技术领域technical field
本发明涉及石油、地质勘探技术领域，尤其涉及一种校正井眼偏心对方位信号影响的方法及装置。The invention relates to the technical fields of petroleum and geological exploration, in particular to a method and a device for correcting the influence of borehole eccentricity on azimuth signals.
背景技术Background technique
目前使用的随钻方位电磁波电阻率仪器主要包括发射天线和接收天线，采用镜像法进行分析。当仪器位于均匀地层时，由于发射和接收线圈的正交性，方位接收线圈中的信号为0。当仪器位于分层地层中时，接收线圈会接收到来自地层边界的反射信号。但是当仪器在井眼中偏心时，不同方向井壁反射的电磁波因不相等而无法抵消，使方位接收线圈中接收到井眼偏心的响应，叠加到我们关心的来自地层边界的反射信号上，干扰我们对地层边界的判断。The currently used azimuth electromagnetic wave resistivity instrument mainly includes transmitting antenna and receiving antenna, which are analyzed by mirror image method. When the tool is located in a uniform formation, the signal in the azimuth receiving coil is zero due to the orthogonality of the transmitting and receiving coils. When the tool is in a layered formation, the receive coil picks up the reflected signal from the formation boundary. However, when the tool is eccentric in the borehole, the electromagnetic waves reflected by the borehole wall in different directions cannot be cancelled, so that the azimuth receiving coil receives the response of the borehole eccentricity, which is superimposed on the reflected signal from the formation boundary that we care about, and interferes Our judgments about stratigraphic boundaries.
现有的解决方式为使用固定校正系数对井眼偏心的影响进行校正，即现有方案认为近、远方位接收天线的信号比与收发距离之间的存在固定关系，并通过该固定关系对井眼偏心产生的影响进行修正。但是在实际应用中发现使用该固定校正系数对井眼偏心的影响校正效果极为有限，在校正后采用该方法任然对地层边界的判断产生较大的影响。The existing solution is to use a fixed correction coefficient to correct the influence of borehole eccentricity, that is, the existing scheme considers that there is a fixed relationship between the signal ratio of the near and far receiving antennas and the transmitting and receiving distance, and through this fixed relationship, the wellbore The effect of eye eccentricity is corrected. However, in practical applications, it is found that the use of this fixed correction coefficient has a very limited correction effect on borehole eccentricity, and the use of this method after correction still has a great impact on the judgment of formation boundaries.
发明内容Contents of the invention
鉴于上述问题，本发明提出了一种校正井眼偏心对方位信号影响的方法及装置，获得的修正参数为综合考虑了地层边界的距离以及地层界面两侧的地层电导率后得到的参数，可对井眼偏心产生的影响进行更加准确的修正。In view of the above problems, the present invention proposes a method and device for correcting the influence of borehole eccentricity on azimuth signals. The obtained correction parameters are parameters obtained after comprehensively considering the distance of the formation boundary and the formation conductivity on both sides of the formation boundary. More accurate corrections are made to the effects of wellbore eccentricity.
第一方面，本申请通过一实施例提供如下技术方案：In the first aspect, the present application provides the following technical solutions through an embodiment:
一种校正井眼偏心对方位信号影响的方法，所述方法包括：A method for correcting the influence of wellbore eccentricity on azimuth signals, the method comprising:
在均匀地层的井眼三维模型中，获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号；其中，所述轴向接收天线、所述第一方位接收天线和所述第二方位接收天线均为随钻方位电磁波电阻率仪器的天线；基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系；根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数；根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。In the borehole three-dimensional model of the uniform formation, the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna are obtained; wherein, the The axial receiving antenna, the first azimuth receiving antenna and the second azimuth receiving antenna are all antennas of the azimuth electromagnetic wave resistivity instrument while drilling; based on the axial signal, the first azimuth signal and the second The orientation signal constructs a polynomial representing the signal relationship; wherein, the signal relationship is the relationship between the signal ratio between the first orientation signal and the second orientation signal and the axial signal; according to the polynomial and the The axial measured signal received by the axial receiving antenna in the borehole is used to obtain a correction coefficient for correcting the borehole eccentricity; according to the correction coefficient, the reflected signal of the borehole wall is eliminated when the instrument in the borehole is eccentric in the actual measurement process , to obtain the third azimuth signal representing the distance to the formation boundary.
优选地，所述获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号，包括：Preferably, the acquiring the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna includes:
获取所述井眼的参数信息；基于所述参数信息，构建所述井眼三维模型；基于所述井眼三维模型进行数值模拟，获得所述轴向信号、所述第一方位信号和所述第二方位信号。Acquiring parameter information of the wellbore; constructing a three-dimensional model of the wellbore based on the parameter information; performing numerical simulation based on the three-dimensional wellbore model to obtain the axial signal, the first azimuth signal and the Second bearing signal.
优选地，所述多项式为：其中，ai为多项式的系数，i取值为0到n，Vzz为均匀地层下的轴向信号，Vzx1为均匀地层下的第一方位信号，Vzx2为均匀地层下的第二方位信号。Preferably, the polynomial is: Among them, ai is the coefficient of the polynomial, i ranges from 0 to n, Vzz is the axial signal under the uniform formation, Vzx1 is the first azimuth signal under the uniform formation, Vzx2 is the second azimuth under the uniform formation Signal.
优选地，所述根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数，包括：Preferably, the correction coefficient for correcting borehole eccentricity is obtained according to the polynomial and the axial measured signal received by the axial receiving antenna in the borehole, including:
基于所述轴向信号、所述第一方位信号与所述第二方位信号，对所述多项式进行数据拟合，确定所述多项式的多项式系数；根据所述多项式系数与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数。Based on the axial signal, the first azimuth signal and the second azimuth signal, data fitting is performed on the polynomial to determine the polynomial coefficient of the polynomial; The axial measured signal received by the axial receiving antenna is used to obtain the correction coefficient for correcting the borehole eccentricity.
优选地，所述根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号，包括：Preferably, according to the correction coefficient, when the instrument in the actual measurement process is eccentric in the borehole, the reflection signal of the borehole wall is eliminated, and the third azimuth signal representing the formation boundary distance is obtained, including:
基于V′zx＝V′zx1-AV′zx2，获得表征地层边界距离的第三方位信号；其中，V'zx为第三方位信号，V'zx1为第一方位接收天线在实际工况下测量得到的第一方位实测信号，V'zx2为第二方位接收天线在实际工况下测量得到的第二方位实测信号，A为校正系数。Based on V'zx = V'zx1 -AV'zx2 , the third azimuth signal representing the distance of the formation boundary is obtained; among them, V'zx is the third azimuth signal, and V'zx1 is the first azimuth receiving antenna measured under actual working conditions The obtained first azimuth measured signal, V'zx2 is the second azimuth measured signal obtained by the second azimuth receiving antenna measured under actual working conditions, and A is the correction coefficient.
第二方面，基于同一发明构思，本申请通过一实施例提供如下技术方案：In the second aspect, based on the same inventive concept, this application provides the following technical solution through an embodiment:
一种校正井眼偏心对方位信号影响的装置，所述装置包括：A device for correcting the influence of wellbore eccentricity on azimuth signals, the device comprising:
模拟参数获取模块，用于在均匀地层的井眼三维模型中，获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号；其中，轴向接收天线、第一方位接收天线和第二方位接收天线均为随钻方位电磁波电阻率仪器的天线；信号关系构建模块，用于基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系；校正系数获取模块，用于根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数；校正模块，用于根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。The simulation parameter acquisition module is used to obtain the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second Azimuth signal; wherein, the axial receiving antenna, the first azimuth receiving antenna and the second azimuth receiving antenna are the antennas of the azimuth electromagnetic wave resistivity instrument while drilling; the signal relationship building block is used for based on the axial signal, the first azimuth receiving antenna An azimuth signal and the second azimuth signal construct a polynomial representing a signal relationship; wherein the signal relationship is the relationship between the signal ratio between the first azimuth signal and the second azimuth signal and the axial signal The correction coefficient acquisition module is used to obtain the correction coefficient for correcting the borehole eccentricity according to the polynomial and the axial measured signal received by the axial receiving antenna in the borehole; the correction module is used to correct the borehole eccentricity according to the The correction coefficient eliminates the reflection signal of the borehole wall when the instrument is eccentric in the borehole during the actual measurement process, and obtains the third azimuth signal representing the formation boundary distance.
优选地，所述模拟参数获取模块，还用于：Preferably, the simulation parameter acquisition module is also used for:
获取所述井眼的参数信息；基于所述参数信息，构建所述井眼三维模型；基于所述井眼三维模型进行数值模拟，获得所述轴向信号、所述第一方位信号和所述第二方位信号。Acquiring parameter information of the wellbore; constructing a three-dimensional model of the wellbore based on the parameter information; performing numerical simulation based on the three-dimensional wellbore model to obtain the axial signal, the first azimuth signal and the Second bearing signal.
优选地，所述校正系数获取模块，具体用于：Preferably, the correction coefficient acquisition module is specifically used for:
基于所述轴向信号、所述第一方位信号与所述第二方位信号，对所述多项式进行数据拟合，确定所述多项式的多项式系数；根据所述多项式系数与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数。Based on the axial signal, the first azimuth signal and the second azimuth signal, data fitting is performed on the polynomial to determine the polynomial coefficient of the polynomial; The axial measured signal received by the axial receiving antenna is used to obtain the correction coefficient for correcting the borehole eccentricity.
优选地，所述校正模块，具体用于：Preferably, the correction module is specifically used for:
基于V′zx＝V′zx1-AV′zx2，获得表征地层边界距离的第三方位信号；其中，V'zx为第三方位信号，V'zx1为第一方位接收天线在实际工况下测量得到的第一方位实测信号，V'zx2为第二方位接收天线在实际工况下测量得到的第二方位实测信号，A为校正系数。Based on V'zx = V'zx1 -AV'zx2 , the third azimuth signal representing the distance of the formation boundary is obtained; among them, V'zx is the third azimuth signal, and V'zx1 is the first azimuth receiving antenna measured under actual working conditions The obtained first azimuth measured signal, V'zx2 is the second azimuth measured signal obtained by the second azimuth receiving antenna measured under actual working conditions, and A is the correction coefficient.
第三方面，基于同一发明构思，本申请通过一实施例提供如下技术方案：In the third aspect, based on the same inventive concept, this application provides the following technical solutions through an embodiment:
一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现第一方面中任一项所述方法的步骤。A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.
本发明实施例提供一种校正井眼偏心对方位信号影响的方法，该方法通过在数值模拟的情况下引入了地层电导率对校正参数的影响，并且在使用轴向接收天线对应的轴向接收信号来表征地层电导率所带来的影响；进一步的，通过构建关于第一方位信号与第二方位信号之间的信号比值与轴向信号之间的关系的多项式来确认校正系数，以此获得的校正系数为考虑了地层电导率影响校正系数；最后，可通过该校正系数对实测过程中的井眼的井壁反射信号进行消除，就可获得表征地层边界距离的第三方位信号，该第三方位信号更加精确，受井眼偏心影响更小。综上，本发明在消除井眼偏心影响时综合考虑了地层电导率的影响因素，对井眼偏心影响的抑制更加彻底，最终可更加准确的确定地层边界距离。The embodiment of the present invention provides a method for correcting the influence of wellbore eccentricity on the azimuth signal. The method introduces the influence of formation conductivity on the correction parameters in the case of numerical simulation, and uses the axial receiving antenna corresponding to the axial receiving signal to characterize the influence of formation conductivity; further, by constructing a polynomial about the relationship between the signal ratio between the first azimuth signal and the second azimuth signal and the axial signal to confirm the correction coefficient, in order to obtain The correction coefficient is a correction coefficient that takes into account the influence of formation conductivity; finally, the reflection signal of the wellbore wall during the actual measurement process can be eliminated by this correction coefficient, and the third azimuth signal representing the formation boundary distance can be obtained. The three-azimuth signal is more accurate and less affected by borehole eccentricity. In summary, the present invention comprehensively considers the influencing factors of formation conductivity when eliminating the influence of wellbore eccentricity, suppresses the influence of wellbore eccentricity more thoroughly, and finally can determine the formation boundary distance more accurately.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.
附图说明Description of drawings
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:
图1示出了本发明第一实施例提供的一种校正井眼偏心对方位信号影响的方法的流程图；Fig. 1 shows a flow chart of a method for correcting the influence of wellbore eccentricity on azimuth signals provided by the first embodiment of the present invention;
图2示出了本发明第一实施例中随钻方位电磁波电阻率仪器天线结构及信号收发原理示意图；Fig. 2 shows a schematic diagram of the antenna structure and signal transceiving principle of the azimuth electromagnetic wave resistivity instrument while drilling in the first embodiment of the present invention;
图3示出了本发明第一实施例中轴向接收天线在井眼三维模型中不同参数条件下的相位响应；Fig. 3 shows the phase response of the axial receiving antenna under different parameter conditions in the borehole three-dimensional model in the first embodiment of the present invention;
图4示出了采用数值模拟验证本发明方法在不同环境中，校正后的实部信号和虚部信号校正前后的对比示意图；Fig. 4 shows the comparison schematic diagram of the real part signal after correction and the imaginary part signal before and after correction by using numerical simulation to verify the method of the present invention in different environments;
图5示出了采用数值模拟验证现有校正方法在不同环境中，校正后的实部信号和虚部信号校正前后的对比示意图；Fig. 5 shows the comparison schematic diagram of the corrected real part signal and the imaginary part signal before and after correction in different environments using numerical simulation to verify the existing correction method;
图6示出了本发明第二实施例提供的一种校正井眼偏心对方位信号影响的装置的功能模块图。Fig. 6 shows a functional block diagram of a device for correcting the influence of borehole eccentricity on azimuth signals provided by the second embodiment of the present invention.
具体实施方式Detailed ways
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
在现有的井眼偏心效应的校正中没有考虑地层电导率对校正效果的影响，然而，通过大量的三维有限差分方法对仪器在井眼中偏心的情况进行建模模拟，发现现有的固定系数的校正方法不能同时满足不同模型的井眼偏心校正。通过大量的对比实验分析发现泥浆电阻率对校正效果的影响有限，另外不同的地层电导率对校正效果会产生比较明显的影响。而现有的固定校正系数并没有考虑到地层电导率的影响。因此在本发明中相对于现有技术而言，综合考虑了地层电导率对井眼偏心校正的影响，并最终确定校正系数。The influence of formation conductivity on the correction effect is not considered in the correction of the existing borehole eccentricity effect. However, through a large number of three-dimensional finite difference methods to model and simulate the eccentricity of the tool in the borehole, it is found that the existing fixed coefficient The correcting method can not meet the borehole eccentricity correction of different models at the same time. Through a large number of comparative experiments, it is found that the influence of mud resistivity on the correction effect is limited, and in addition, different formation conductivity will have a more obvious influence on the correction effect. However, the existing fixed correction coefficients do not take into account the influence of formation conductivity. Therefore, compared with the prior art, in the present invention, the influence of the formation conductivity on the correction of borehole eccentricity is comprehensively considered, and the correction coefficient is finally determined.
不同的地层环境对应着不同的地层电导率，在本实施例中，可通过采集随钻方位电磁波电阻率仪器的轴向接收天线接收的信号来反映地层电导率。进一步的说明，请参阅下述实施例。Different formation environments correspond to different formation conductivity. In this embodiment, the formation conductivity can be reflected by collecting signals received by the axial receiving antenna of the azimuth electromagnetic wave resistivity instrument while drilling. For further illustration, see the Examples below.
第一实施例first embodiment
请参阅图1，在本实施例中提供一种校正井眼偏心对方位信号影响的方法，所述方法包括：Please refer to FIG. 1 , in this embodiment, a method for correcting the influence of borehole eccentricity on azimuth signals is provided, and the method includes:
步骤S10：在均匀地层的井眼三维模型中，获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号；其中，所述轴向接收天线、所述第一方位接收天线和所述第二方位接收天线均为随钻方位电磁波电阻率仪器的天线；Step S10: In the three-dimensional wellbore model of the uniform formation, obtain the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna; wherein , the axial receiving antenna, the first azimuth receiving antenna and the second azimuth receiving antenna are all antennas of the azimuth electromagnetic wave resistivity instrument while drilling;
步骤S20：基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系；Step S20: Construct a polynomial representing a signal relationship based on the axial signal, the first orientation signal, and the second orientation signal; wherein, the signal relationship is the first orientation signal and the second orientation signal The relationship between the signal ratio and the axial signal;
步骤S30：根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数；Step S30: Obtain a correction coefficient for correcting borehole eccentricity according to the polynomial and the axial measured signal received by the axial receiving antenna in the borehole;
步骤S40：根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。Step S40: Eliminate the reflection signal of the borehole wall when the tool is eccentric in the borehole during the actual measurement process according to the correction coefficient, and obtain the third azimuth signal representing the formation boundary distance.
在步骤S10中，轴向接收天线，第一方位接收天线，以及第二方位接收天线中均具有接收线圈。In step S10, the axial receiving antenna, the first azimuth receiving antenna, and the second azimuth receiving antenna all have receiving coils.
在均匀地层中各个接收到的各个信号均是由井眼的井壁反射回来的信号，不存在地层边界反射的信号，因此可针对性的进行消除。具体的，轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号。请参阅图2，图2为随钻方位电磁波电阻率仪器天线结构及信号收发原理示意图，其中，T1为发射天线，Rz1为轴向接收天线，Rx1、Rx2为方位接收天线。Each signal received in a uniform formation is a signal reflected by the wellbore wall, and there is no signal reflected by the formation boundary, so it can be eliminated in a targeted manner. Specifically, the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna. Please refer to Fig. 2. Fig. 2 is a schematic diagram of the antenna structure and signal transceiving principle of the azimuth electromagnetic wave resistivity instrument while drilling, where T1 is the transmitting antenna, Rz1 is the axial receiving antenna, and Rx1 and Rx2 are the azimuth receiving antennas.
方位电磁波仪器的基本工作原理可以使用镜像法进行分析，当仪器位于均匀地层时，由于发射和接收线圈的正交性，方位接收线圈(第一方位接收天线、第二方位接收天下，下同)中的信号为0；当仪器位于分层地层中时，接收线圈会接收到来自地层边界的反射信号。但是，由于仪器偏心时也会在方位接收线圈中产生不为0的信号，由于在均匀地层中，不用考虑地层边界反射的信号，只需要对井眼的井壁反射信号进行消除即可，即在均匀地层中时对方位线圈中不为0的信号进行消除。The basic working principle of the azimuth electromagnetic wave instrument can be analyzed using the mirror image method. When the instrument is located in a uniform formation, due to the orthogonality of the transmitting and receiving coils, the azimuth receiving coil (the first azimuth receiving antenna, the second azimuth receiving antenna, the same below) The signal in is 0; when the tool is in a layered formation, the receiving coil will receive the reflected signal from the formation boundary. However, when the tool is eccentric, a non-zero signal will also be generated in the azimuth receiving coil. In a uniform formation, the signal reflected by the formation boundary does not need to be considered, and it is only necessary to eliminate the reflected signal of the borehole wall, that is, In the uniform formation, the non-zero signal in the azimuth coil is eliminated.
在步骤S10中，井眼三维模型的构建包括如下步骤：In step S10, the construction of the borehole three-dimensional model includes the following steps:
步骤S11：获取所述井眼的参数信息。具体的，在本实施例中提供两个井眼的参数信息示例，具体为模型1与模型2：Step S11: Obtain parameter information of the borehole. Specifically, in this embodiment, two wellbore parameter information examples are provided, specifically model 1 and model 2:
表1.三维建模模型参数Table 1. 3D modeling model parameters
步骤S12：基于所述参数信息，构建所述井眼三维模型。Step S12: Construct the three-dimensional model of the borehole based on the parameter information.
步骤S13：基于所述井眼三维模型进行数值模拟，获得所述轴向信号、所述第一方位信号和所述第二方位信号。Step S13: Perform numerical simulation based on the three-dimensional borehole model to obtain the axial signal, the first azimuth signal and the second azimuth signal.
在步骤S13中，数值模拟的方式可为：有限差分方法；此外，还可为有限元法、有限体积法等现有方法，不作限制，亦不再赘述。In step S13, the method of numerical simulation can be: finite difference method; in addition, it can also be existing methods such as finite element method and finite volume method, which are not limited and will not be repeated here.
步骤S20：基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系。Step S20: Construct a polynomial representing a signal relationship based on the axial signal, the first orientation signal, and the second orientation signal; wherein, the signal relationship is the first orientation signal and the second orientation signal The relationship between the signal ratio and the axial signal.
在步骤S20中，对轴向信号进行模拟分析，可以得知传统轴向线圈的响应与地层电导率直接相关且与井眼偏心及泥浆电导率基本无关，如图3所示，图3示出了轴向接收天线在井眼三维模型中不同参数条件下的相位响应。同时，考察了长、短收发距信号响应的比值与轴向接收线圈响应Vzz的关系，其中Vzx1为均匀地层下的第一方位接收天线对应的第一方位信号，Vzx2为均匀地层下的第二方位接收天线对应的第二方位信号，Vzz为均匀地层下的轴向信号。考虑到井眼偏心对方位天线响应影响的原因为电磁波在井壁上的反射，而电磁波的反射大小主要取决于界面两侧的地层介质。我们知道，轴向天线的单发单收相位具有最浅的探测深度，最能反映井壁附近的地层电导率，故本实施例中采用轴向接收线圈响应Vzz作为表征地层电导率的信号。In step S20, the axial signal is simulated and analyzed, and it can be known that the response of the traditional axial coil is directly related to the formation conductivity and has basically nothing to do with the borehole eccentricity and mud conductivity, as shown in Fig. 3. The phase response of the axial receiving antenna under different parameters in the borehole 3D model is studied. At the same time, the ratio of long and short sending and receiving distance signal responses was investigated The relationship with the axial receiving coil response Vzz , where Vzx1 is the first azimuth signal corresponding to the first azimuth receiving antenna under the uniform formation, Vzx2 is the second azimuth signal corresponding to the second azimuth receiving antenna under the uniform formation, Vzz is the axial signal under uniform formation. Considering that the influence of borehole eccentricity on the azimuth antenna response is due to the reflection of electromagnetic waves on the borehole wall, and the magnitude of the reflection of electromagnetic waves mainly depends on the formation medium on both sides of the interface. We know that the single-shot and single-receive phase of the axial antenna has the shallowest detection depth and can best reflect the formation conductivity near the borehole wall, so in this embodiment, the axial receiving coil response Vzz is used as the signal representing the formation conductivity .
进一步的，在本实施例中可构建多项式以确定长、短收发距信号响应的比值与轴向接收线圈响应Vzz之间的关系，在本实施例中多项式可采用二次多项式、三次多项式、四次多项式等，多项式的次数及项数不作限制，也即多项式可为：其中，ai为多项式的系数，i取值为0到n，Vzz为均匀地层下的轴向信号，Vzx1为均匀地层下的第一方位信号，Vzx2为均匀地层下的第二方位信号。。具体可以根据实际工况条件进行尝试以确认效果。在本实施例中以二次多项式为例进行详细阐述，具体如下：Further, in this embodiment, a polynomial can be constructed to determine the ratio of long and short sending and receiving distance signal responses Relation with the axial receiving coil response Vzz , polynomials in the present embodiment can adopt quadratic polynomials, cubic polynomials, quartic polynomials, etc., and the number of polynomials and the number of items are not limited, that is, the polynomials can be: Among them, ai is the coefficient of the polynomial, i ranges from 0 to n, Vzz is the axial signal under the uniform formation, Vzx1 is the first azimuth signal under the uniform formation, Vzx2 is the second azimuth under the uniform formation Signal. . Specifically, you can try it according to the actual working conditions to confirm the effect. In this embodiment, the quadratic polynomial is taken as an example to elaborate, specifically as follows:
其中，a、b、c为多项式的系数，Vzz为均匀地层下的轴向信号，Vzx1为均匀地层下的第一方位信号，Vzx2为均匀地层下的第二方位信号。通过即可表示地层电导率与之间的关系，可见通过Vzz对井眼偏心的修正引入了地层电导率的影响。 Among them, a, b, and c are polynomial coefficients, Vzz is the axial signal under the uniform formation, Vzx1 is the first azimuth signal under the uniform formation, and Vzx2 is the second azimuth signal under the uniform formation. pass That is to say, the formation conductivity and It can be seen that the correction of borehole eccentricity through Vzz introduces the influence of formation conductivity.
步骤S30：根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数。Step S30: Obtain a correction coefficient for correcting borehole eccentricity according to the polynomial and the axial measured signal received by the axial receiving antenna in the borehole.
在步骤S30中，具体实施包括如下步骤：In step S30, the specific implementation includes the following steps:
步骤S31：基于所述轴向信号、所述第一方位信号与所述第二方位信号，对所述多项式进行数据拟合，确定所述多项式的多项式系数。其中，所述轴向信号、所述第一方位信号与所述第二方位信号均可由在均匀地层的井眼三维模型中的数值模拟得到。进行数据拟合时可采用最小二乘法，最后可确定多项式的各个系数，如确定二次多项式中的系数a、b、c。Step S31: Based on the axial signal, the first orientation signal and the second orientation signal, data fitting is performed on the polynomial, and polynomial coefficients of the polynomial are determined. Wherein, the axial signal, the first azimuth signal and the second azimuth signal can all be obtained by numerical simulation in a three-dimensional wellbore model of a uniform formation. The least square method can be used for data fitting, and finally each coefficient of the polynomial can be determined, such as determining the coefficients a, b, and c in the quadratic polynomial.
步骤S32：根据所述多项式系数与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数。其中，以上述的为例，校正系数其中A为校正系数。Step S32: Obtain a correction coefficient for correcting borehole eccentricity according to the polynomial coefficients and the axial measured signal received by the axial receiving antenna in the borehole. Among them, with the above As an example, the correction factor Where A is the correction factor.
步骤S40：根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。Step S40: Eliminate the reflection signal of the borehole wall when the tool is eccentric in the borehole during the actual measurement process according to the correction coefficient, and obtain the third azimuth signal representing the formation boundary distance.
在步骤S40中，由于已经确定了校正系数，而通过校正系数就可对井眼的井壁反射信号(井壁反射信号无法完全自行抵消)进行消除，最终获得第三方位信号。即，在实际的钻井测量过程中可基于V′zx＝V′zx1-AV′zx2，获得表征地层边界距离的第三方位信号。其中，A为校正系数，V'zx为第三方位信号，可用于表征井眼与地层边界之间的距离，V'zx1为第一方位接收天线在实际工况下测量得到的第一方位实测信号，V'zx2为第二方位接收天线在实际工况下测量得到的第二方位实测信号。最后获得的第三方位信号V′zx为结合了地层电导率对井眼偏心的影响校正后得到的方位信号，可以更加准确的反应地层边界的距离。In step S40, since the correction coefficient has been determined, the borehole wall reflection signal of the borehole (the borehole wall reflection signal cannot be completely canceled by itself) can be eliminated through the correction coefficient, and finally the third azimuth signal is obtained. That is, in the actual drilling measurement process, the third azimuth signal representing the formation boundary distance can be obtained based on V'zx =V'zx1 -AV'zx2 . Among them, A is the correction coefficient,V'zx is the third azimuth signal, which can be used to represent the distance between the borehole and the formation boundary,V'zx1 is the first azimuth measured by the first azimuth receiving antenna under actual working conditions signal, V'zx2 is the second azimuth actual measurement signal obtained by the second azimuth receiving antenna under actual working conditions. The finally obtained third azimuth signalV′zx is the azimuth signal obtained after correction combined with the influence of formation conductivity on borehole eccentricity, which can more accurately reflect the distance of the formation boundary.
对构建模型3对本实施例提供的方法在分层地层情况下进行模拟验证，模型3为水平井模型。For the construction of model 3, the method provided in this embodiment is simulated and verified in the case of layered formations, and model 3 is a horizontal well model.
表2模型3参数Table 2 Model 3 parameters
在模型3情况下，仪器在偏心井眼中的响应如图4所示。本文使用泥浆电阻率Rm＝1000Ω·m，均匀地层计算的校正系数进行校正。从图4中我们可以看到，模型3的条件下，经过使用本方法校正的不同偏心距的方位信号基本重合，其中(a)为方位信号的实部校正前和校正后对比示意图，(b)为方位信号的虚部校正前和校正后对比示意图；图5，为采用现有技术的矫正效果的对比图，其中(c)为方位信号的实部校正前和校正后对比示意图，(d)为方位信号的虚部校正前和校正后对比示意图。可见以上数值模拟结果验证了本实施例中方法对井眼偏心校正的有效性。In the case of Model 3, the response of the tool in an eccentric borehole is shown in Fig. 4. In this paper, the mud resistivity Rm = 1000Ω·m, and the correction coefficient calculated for uniform formation are used for correction. From Figure 4, we can see that under the condition of model 3, the azimuth signals with different eccentricities corrected by this method basically overlap, where (a) is a schematic diagram of the comparison of the real part of the azimuth signal before and after correction, (b ) is a comparison diagram of the imaginary part of the azimuth signal before and after correction; FIG. ) is a comparison diagram of the imaginary part of the azimuth signal before and after correction. It can be seen that the above numerical simulation results verify the effectiveness of the method in this embodiment for borehole eccentricity correction.
本发明实施例提供一种校正井眼偏心对方位信号影响的方法，该方法通过在数值模拟的情况下引入了地层电导率对校正参数的影响，并且在使用轴向接收天线对应的轴向接收信号来表征地层电导率所带来的影响；进一步的，通过构建关于第一方位信号与第二方位信号之间的信号比值与轴向信号之间的关系的多项式来确认校正系数，以此获得的校正系数为考虑了地层电导率影响校正系数；最后，可通过该校正系数对实测过程中的井眼的井壁反射信号进行消除，就可获得表征地层边界距离的第三方位信号，该第三方位信号更加精确，受井眼偏心影响更小。综上，本发明在消除井眼偏心影响时综合考虑了地层电导率的影响因素，对井眼偏心影响的抑制更加彻底，最终可更加准确的确定地层边界距离。The embodiment of the present invention provides a method for correcting the influence of wellbore eccentricity on the azimuth signal. The method introduces the influence of formation conductivity on the correction parameters in the case of numerical simulation, and uses the axial receiving antenna corresponding to the axial receiving signal to characterize the influence of formation conductivity; further, by constructing a polynomial about the relationship between the signal ratio between the first azimuth signal and the second azimuth signal and the axial signal to confirm the correction coefficient, in order to obtain The correction coefficient is a correction coefficient that takes into account the influence of formation conductivity; finally, the reflection signal of the wellbore wall during the actual measurement process can be eliminated by this correction coefficient, and the third azimuth signal representing the formation boundary distance can be obtained. The three-azimuth signal is more accurate and less affected by borehole eccentricity. In summary, the present invention comprehensively considers the influencing factors of formation conductivity when eliminating the influence of wellbore eccentricity, suppresses the influence of wellbore eccentricity more thoroughly, and finally can determine the formation boundary distance more accurately.
第二实施例second embodiment
请参照图6，基于同一发明构思，在本实施例中提供一种校正井眼偏心对方位信号影响的装置300，所述装置300包括：Please refer to Fig. 6, based on the same inventive concept, a device 300 for correcting the influence of borehole eccentricity on azimuth signals is provided in this embodiment, and the device 300 includes:
模拟参数获取模块301，用于在均匀地层的井眼三维模型中，获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号；其中，所述轴向接收天线、所述第一方位接收天线和所述第二方位接收天线均为随钻方位电磁波电阻率仪器的天线；The simulation parameter acquisition module 301 is used to obtain the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna in the three-dimensional wellbore model of the uniform formation. Two azimuth signals; wherein, the axial receiving antenna, the first azimuth receiving antenna and the second azimuth receiving antenna are all antennas of the azimuth electromagnetic wave resistivity instrument while drilling;
信号关系构建模块302，用于基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系；A signal relationship construction module 302, configured to construct a polynomial representing a signal relationship based on the axial signal, the first orientation signal, and the second orientation signal; wherein, the signal relationship is the first orientation signal and the The relationship between the signal ratio between the second azimuth signals and the axial signal;
校正系数获取模块303，用于根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数；A correction coefficient acquisition module 303, configured to obtain a correction coefficient for correcting borehole eccentricity according to the polynomial and the axial measured signal received by the axial receiving antenna in the borehole;
校正模块304，用于根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。The correction module 304 is used to eliminate the reflection signal of the borehole wall when the tool is eccentric in the borehole during the actual measurement process according to the correction coefficient, so as to obtain the third azimuth signal representing the boundary distance of the formation.
作为一种可选的实施方式，所述模拟参数获取模块301，还用于：As an optional implementation, the simulation parameter acquisition module 301 is also used for:
获取所述井眼的参数信息；基于所述参数信息，构建所述井眼三维模型；基于所述井眼三维模型进行数值模拟，获得所述轴向信号、所述第一方位信号和所述第二方位信号。Acquiring parameter information of the wellbore; constructing a three-dimensional model of the wellbore based on the parameter information; performing numerical simulation based on the three-dimensional wellbore model to obtain the axial signal, the first azimuth signal and the Second bearing signal.
作为一种可选的实施方式，所述多项式为：其中，ai为多项式的系数，i取值为0到n，Vzz为均匀地层下的轴向信号，Vzx1为均匀地层下的第一方位信号，Vzx2为均匀地层下的第二方位信号。As an optional implementation, the polynomial is: Among them, ai is the coefficient of the polynomial, i ranges from 0 to n, Vzz is the axial signal under the uniform formation, Vzx1 is the first azimuth signal under the uniform formation, Vzx2 is the second azimuth under the uniform formation Signal.
作为一种可选的实施方式，所述校正系数获取模块303，具体用于：As an optional implementation manner, the correction coefficient acquisition module 303 is specifically used for:
基于所述轴向信号、所述第一方位信号与所述第二方位信号，对所述多项式进行数据拟合，确定所述多项式的多项式系数；根据所述多项式系数与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数。Based on the axial signal, the first azimuth signal and the second azimuth signal, data fitting is performed on the polynomial to determine the polynomial coefficient of the polynomial; The axial measured signal received by the axial receiving antenna is used to obtain the correction coefficient for correcting the borehole eccentricity.
作为一种可选的实施方式，所述校正模块304，具体用于：As an optional implementation manner, the correction module 304 is specifically configured to:
基于V′zx＝V′zx1-AV′zx2，获得表征地层边界距离的第三方位信号；其中，V'zx为第三方位信号，V'zx1为第一方位接收天线在实际工况下测量得到的第一方位实测信号，V'zx2为第二方位接收天线在实际工况下测量得到的第二方位实测信号，A为校正系数。Based on V'zx = V'zx1 -AV'zx2 , the third azimuth signal representing the distance of the formation boundary is obtained; among them, V'zx is the third azimuth signal, and V'zx1 is the first azimuth receiving antenna measured under actual working conditions The obtained first azimuth measured signal, V'zx2 is the second azimuth measured signal obtained by the second azimuth receiving antenna measured under actual working conditions, and A is the correction coefficient.
需要说明的是，本发明实施例所提供的一种校正井眼偏心对方位信号影响的300，其具体实现及产生的技术效果和前述方法实施例相同，为简要描述，装置实施例部分未提及之处，可参考前述方法实施例中相应内容。It should be noted that the embodiment of the present invention provides a 300 for correcting the influence of borehole eccentricity on azimuth signals. Its specific implementation and technical effects are the same as those of the aforementioned method embodiments. For details, reference may be made to the corresponding content in the aforementioned method embodiments.
需要说明的是，本发明实施例所提供的用户终端中，上述每个步骤的具体实现及产生的技术效果和前述方法实施例相同，为简要描述，本实施例未提及之处可参考前述方法实施例中相应内容。It should be noted that, in the user terminal provided by the embodiment of the present invention, the specific implementation and technical effects of each of the above steps are the same as those of the foregoing method embodiments. For a brief description, reference may be made to the aforementioned The corresponding content in the method embodiment.
第三实施例third embodiment
在本实施例中还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如下的步骤：In this embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:
在均匀地层的井眼三维模型中，获取轴向接收天线对应的轴向信号，第一方位接收天线对应的第一方位信号，以及第二方位接收天线对应的第二方位信号；其中，轴向接收天线、第一方位接收天线和第二方位接收天线均为随钻方位电磁波电阻率仪器的天线；基于所述轴向信号、所述第一方位信号与所述第二方位信号构建表示信号关系的多项式；其中，所述信号关系为所述第一方位信号与所述第二方位信号之间的信号比值与所述轴向信号的关系；根据所述多项式与所述井眼中的所述轴向接收天线接收的轴向实测信号，获得对井眼偏心进行校正的校正系数；根据所述校正系数对实测过程中的仪器在井眼中偏心时对井壁反射信号进行消除，获得表征地层边界距离的第三方位信号。In the three-dimensional model of the wellbore in the uniform formation, the axial signal corresponding to the axial receiving antenna, the first azimuth signal corresponding to the first azimuth receiving antenna, and the second azimuth signal corresponding to the second azimuth receiving antenna are obtained; The receiving antenna, the first azimuth receiving antenna and the second azimuth receiving antenna are all antennas of the azimuth electromagnetic wave resistivity instrument while drilling; constructing a signal relationship based on the axial signal, the first azimuth signal and the second azimuth signal polynomial; wherein, the signal relationship is the relationship between the signal ratio between the first azimuth signal and the second azimuth signal and the axial signal; according to the polynomial and the axis in the borehole The axial measured signal received by the receiving antenna is used to obtain the correction coefficient for correcting the borehole eccentricity; according to the correction coefficient, the reflected signal of the borehole wall is eliminated when the instrument is eccentric in the borehole during the actual measurement process, and the distance representing the formation boundary is obtained. the third position signal.
本发明提供的装置集成的功能模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实现上述实施例的方法中的全部或部分流程，也可以通过计算机程序来指令相关的硬件来完成，所述的计算机程序可存储于一计算机可读存储介质中，该计算机程序在被处理器执行时，可实现上述各个方法实施例的步骤。其中，所述计算机程序包括计算机程序代码，所述计算机程序代码可以为源代码形式、对象代码形式、可执行文件或某些中间形式等。所述计算机可读介质可以包括：能够携带所述计算机程序代码的任何实体或装置、记录介质、U盘、移动硬盘、磁碟、光盘、计算机存储器、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、电载波信号、电信信号以及软件分发介质等。需要说明的是，所述计算机可读介质包含的内容可以根据司法管辖区内立法和专利实践的要求进行适当的增减，例如在某些司法管辖区，根据立法和专利实践，计算机可读介质不包括电载波信号和电信信号。If the functional modules integrated in the device provided by the present invention are realized in the form of software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments in the present invention can also be completed by instructing related hardware through computer programs, and the computer programs can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can realize the steps of the above-mentioned various method embodiments. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, computer-readable media Excludes electrical carrier signals and telecommunication signals.
在此提供的算法和显示不与任何特定计算机、虚拟系统或者其它设备固有相关。各种通用系统也可以与基于在此的示教一起使用。根据上面的描述，构造这类系统所要求的结构是显而易见的。此外，本发明也不针对任何特定编程语言。应当明白，可以利用各种编程语言实现在此描述的本发明的内容，并且上面对特定语言所做的描述是为了披露本发明的最佳实施方式。The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other device. Various generic systems can also be used with the teachings based on this. The structure required to construct such a system is apparent from the above description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the content of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.
类似地，应当理解，为了精简本公开并帮助理解各个发明方面中的一个或多个，在上面对本发明的示例性实施例的描述中，本发明的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明的单独实施例。Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.
本领域那些技术人员可以理解，可以对实施例中的设备中的模块进行自适应性地改变并且把它们设置在与该实施例不同的一个或多个设备中。可以把实施例中的模块或单元或组件组合成一个模块或单元或组件，以及此外可以把它们分成多个子模块或子单元或子组件。除了这样的特征和/或过程或者单元中的至少一些是相互排斥之外，可以采用任何组合对本说明书(包括伴随的权利要求、摘要和附图)中公开的所有特征以及如此公开的任何方法或者设备的所有过程或单元进行组合。除非另外明确陈述，本说明书(包括伴随的权利要求、摘要和附图)中公开的每个特征可以由提供相同、等同或相似目的的替代特征来代替。Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
此外，本领域的技术人员能够理解，尽管在此的一些实施例包括其它实施例中所包括的某些特征而不是其它特征，但是不同实施例的特征的组合意味着处于本发明的范围之内并且形成不同的实施例。例如，在下面的权利要求书中，所要求保护的实施例的任意之一都可以以任意的组合方式来使用。Furthermore, those skilled in the art will understand that although some embodiments herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. And form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
本发明的各个部件实施例可以以硬件实现，或者以在一个或者多个处理器上运行的软件模块实现，或者以它们的组合实现。本领域的技术人员应当理解，可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本发明实施例的网关、代理服务器、系统中的一些或者全部部件的一些或者全部功能。本发明还可以实现为用于执行这里所描述的方法的一部分或者全部的设备或者装置程序(例如，计算机程序和计算机程序产品)。这样的实现本发明的程序可以存储在计算机可读介质上，或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到，或者在载体信号上提供，或者以任何其他形式提供。The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all functions of some or all components in the gateway, proxy server, and system according to the embodiments of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.
应该注意的是上述实施例对本发明进行说明而不是对本发明进行限制，并且本领域技术人员在不脱离所附权利要求的范围的情况下可设计出替换实施例。在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本发明可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中，这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777451.9ACN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777451.9ACN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
| Publication Number | Publication Date |
|---|---|
| CN110454154Atrue CN110454154A (en) | 2019-11-15 |
| CN110454154B CN110454154B (en) | 2020-08-25 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910777451.9AActiveCN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
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| CN (1) | CN110454154B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256806A (en)* | 2021-12-10 | 2023-06-13 | 中国石油天然气集团有限公司 | Centering azimuth array lateral instrument and eccentricity compensation method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619099A (en)* | 2003-10-15 | 2005-05-25 | 施卢默格海外有限公司 | Inductive Measurement of Wellbore Effect Reduction |
| CN1644875A (en)* | 2003-12-02 | 2005-07-27 | 施卢默格海外有限公司 | Apparatus and method for addressing borehole eccentricity effects |
| CN102493766A (en)* | 2011-11-30 | 2012-06-13 | 中国石油集团钻井工程技术研究院 | Borehole track control method and borehole track control system |
| WO2016108840A1 (en)* | 2014-12-30 | 2016-07-07 | Halliburton Energy Services, Inc. | Electromagnetic ranging with azimuthal electromagnetic logging tool |
| US20160369625A1 (en)* | 2015-06-22 | 2016-12-22 | Conocophillips Company | Crustal and disturbance field survey correction |
| CN108547611A (en)* | 2018-03-01 | 2018-09-18 | 杭州迅美科技有限公司 | Horizontal well complex environment is with brill electromagnetic wave resistivity logging rapid simulation method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619099A (en)* | 2003-10-15 | 2005-05-25 | 施卢默格海外有限公司 | Inductive Measurement of Wellbore Effect Reduction |
| CN1644875A (en)* | 2003-12-02 | 2005-07-27 | 施卢默格海外有限公司 | Apparatus and method for addressing borehole eccentricity effects |
| CN102493766A (en)* | 2011-11-30 | 2012-06-13 | 中国石油集团钻井工程技术研究院 | Borehole track control method and borehole track control system |
| WO2016108840A1 (en)* | 2014-12-30 | 2016-07-07 | Halliburton Energy Services, Inc. | Electromagnetic ranging with azimuthal electromagnetic logging tool |
| US20160369625A1 (en)* | 2015-06-22 | 2016-12-22 | Conocophillips Company | Crustal and disturbance field survey correction |
| CN108547611A (en)* | 2018-03-01 | 2018-09-18 | 杭州迅美科技有限公司 | Horizontal well complex environment is with brill electromagnetic wave resistivity logging rapid simulation method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256806A (en)* | 2021-12-10 | 2023-06-13 | 中国石油天然气集团有限公司 | Centering azimuth array lateral instrument and eccentricity compensation method |
| CN116256806B (en)* | 2021-12-10 | 2025-07-01 | 中国石油天然气集团有限公司 | A central azimuth array lateral instrument and eccentricity compensation method |
| Publication number | Publication date |
|---|---|
| CN110454154B (en) | 2020-08-25 |
| Publication | Publication Date | Title |
|---|---|---|
| RU2431871C2 (en) | Anti-symmetrised electro-magnetic measurements | |
| US8614578B2 (en) | Attenuation of electromagnetic signals passing through conductive material | |
| US20150338378A1 (en) | Ultrasonic signal time-frequency decomposition for borehole evaluation or pipeline inspection | |
| CN109581501B (en) | Method for modeling depth domain speed of desert area | |
| CA2895025C (en) | Sourceless density determination apparatus, methods, and systems | |
| WO2009137287A1 (en) | Characterizing at least one property of a liner that lines a well | |
| US20190034568A1 (en) | Advanced downhole waveform interpretation | |
| CN115144906B (en) | Amplitude eccentricity correction method and device for ultrasonic logging | |
| CN106324665A (en) | Method and system of inverting fracture density | |
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| CN116241239B (en) | Well cementation evaluation method, device, equipment and storage medium based on far and near monopoles | |
| CN110454154B (en) | Method and device for correcting influence of borehole eccentricity on azimuth signal | |
| Maalouf et al. | Inversion-based method to mitigate noise in borehole sonic logs | |
| Tilsley-Baker et al. | The importance of extra-deep azimuthal resistivity in reservoir development: An update on recent field experiences | |
| Li et al. | Calibration method of azimuth electromagnetic boundary detection logging while drilling based on air–seawater double-layer dielectric as reflection interface | |
| CN103439748A (en) | Method for detecting stratum, method for calculating oil and gas saturation of stratum, combination electrode and detector | |
| Sun et al. | Automated resistivity inversion for efficient formation evaluation in high-angle and horizontal wells | |
| Yu et al. | An Advanced Technique for Simultaneous in Situ Inspection of Multiple Metallic Tubulars | |
| CA3062497C (en) | Three-dimensional fracture radius model | |
| WO2024093791A1 (en) | Scale system and scale method for through-casing electromagnetic instrument | |
| WANG et al. | A phased arc array acoustic LWD transmitter constructed by arcuate piezoelectric vibrators | |
| CN103412330B (en) | A kind of seismic attributes data processing method and device | |
| EP2718747A1 (en) | Method of mapping a subterranean formation based upon wellbore position and seismic data and related system | |
| Yu et al. | The reduction of near zone effects on the multi-component induction logging tool | |
| Malarkodi et al. | Interlaboratory comparisons of hydrophone calibration in the 3–500 kHz frequency range |
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