技术领域technical field
本发明属于丛式井钻井技术领域，尤其涉及一种反磁矩补偿磁化场随钻旋转测距装置及测距防碰方法。The invention belongs to the technical field of cluster well drilling, and in particular relates to a diamagnetic moment compensation magnetization field rotary ranging device while drilling and a ranging anti-collision method.
背景技术Background technique
丛式井钻井过程中，由于隔水管的井斜误差、直井段的井斜误差、仪器测量误差和人为因素等各种影响因素，导致正钻井轨迹不能严格按照预定轨迹钻进，致使正钻井与已钻井轨迹碰撞的事故时有发生，造成油气井停产、报废而产生巨大经济损失，处理不当还可能会产生严重环境污染及施工人员伤亡。因此，解决井眼防碰问题，在丛式井钻井过程中具有重要的现实意义。During the drilling process of cluster wells, due to various influencing factors such as riser inclination error, vertical well inclination error, instrument measurement error and human factors, the positive drilling trajectory cannot be drilled strictly according to the predetermined trajectory, resulting in positive drilling and Accidents of collisions between drilling trajectories occur from time to time, causing oil and gas wells to be shut down and scrapped, resulting in huge economic losses. Improper handling may also cause serious environmental pollution and construction personnel casualties. Therefore, solving the problem of borehole anti-collision has important practical significance in the drilling process of cluster wells.
预防井眼碰撞的方法有两大类，第一类方法是精确控制井眼轨迹，使井眼轨迹严格按照预先设计的不会导致碰撞的轨迹钻进；第二类方法是钻进过程中实施监控正钻井与邻井之间的距离，使得正钻井在防碰安全距离内钻进。第一类方法通过提高井眼轨迹测量计算仪器的精度，以减少井眼轨迹误差来实现，但这种方法只是钻前的预防功能，无法做到钻时实时监测正钻井与邻井之间的距离，因此无法从根源上避免井眼碰撞。第二类方法能够实时监测正钻井与邻井之间的距离，使这个距离一直保持一个合理的不会导致碰撞的值，该类方法能够从根源上解决井眼防碰撞的问题，是丛式井防碰钻进的主要研究方向。There are two types of methods to prevent wellbore collisions. The first method is to precisely control the wellbore trajectory so that the wellbore trajectory is drilled in strict accordance with the pre-designed trajectory that will not cause collisions; the second method is to implement Monitor the distance between the well being drilled and the adjacent well, so that the well being drilled is drilled within the anti-collision safety distance. The first type of method is realized by improving the accuracy of the wellbore trajectory measurement and calculation instrument to reduce the wellbore trajectory error, but this method is only a preventive function before drilling, and cannot achieve real-time monitoring of the relationship between the ongoing drilling and adjacent wells during drilling. Therefore, the wellbore collision cannot be avoided from the root. The second type of method can monitor the distance between the well being drilled and the adjacent well in real time, and keep this distance at a reasonable value that will not cause collision. This type of method can solve the problem of wellbore anti-collision from the root, and is a cluster type. The main research direction of well anti-collision drilling.
目前，钻井测距防碰监测方法技术主要有震动监测法、单电缆引导系统(SingleWireGuidance，SWG)、旋转磁场测距系统((RotatingMagnetRangingService，RMRS)及电磁铁防碰实时测距系统等。震动监测法是一种可以避免碰撞的预警方法，主要有套管震动监测法与随钻震动监测法。套管震动监测法通过检测地面已钻井套管头震动信号，并对信号进行处理以判断正钻井是否到达碰撞危险范围，由于震动传播受套管长度及固井质量影响，该预警方法准确性不够高。随钻震动监测法是在已钻生产井中下入声波传感器，通过监测震动能量变化判断正钻井钻头与传感器之间的大致距离进行防碰预警，该防碰方法应用时需要与正钻井钻头同步移动才能准确的判断钻头与已钻井之间的最短距离，钻头及钻杆与井身碰撞产生震动还会干扰钻头震动监测，同时震动传播衰减快慢受地层影响，因此井底震动监测法预警范围小且准确性不够高。At present, the drilling ranging and anti-collision monitoring methods mainly include vibration monitoring method, single cable guidance system (SingleWireGuidance, SWG), rotating magnetic field ranging system (RotatingMagnetRangingService, RMRS) and electromagnet anti-collision real-time ranging system, etc. Vibration monitoring The method is an early warning method that can avoid collisions, mainly including the casing vibration monitoring method and the vibration monitoring while drilling method. The casing vibration monitoring method detects the vibration signal of the casing head that has been drilled on the ground and processes the signal to judge whether the drilling is underway. The accuracy of the early warning method is not high enough because the vibration propagation is affected by the casing length and cementing quality. The vibration monitoring method is to install an acoustic wave sensor in the drilled production well and judge the normality by monitoring the vibration energy change. The approximate distance between the drilling bit and the sensor is used for anti-collision warning. When this anti-collision method is applied, it needs to move synchronously with the drilling bit to accurately judge the shortest distance between the drill bit and the drilled well. Vibration can also interfere with drill bit vibration monitoring, and the attenuation speed of vibration propagation is affected by the formation. Therefore, the early warning range of the bottom hole vibration monitoring method is small and the accuracy is not high enough.
SWG系统工作原理是在已钻井中下入一根电缆通入一个恒定的电流，使得电缆的周围会产生一个固定的磁场，通过正钻井钻头附近MWD中的磁场测量单元对电缆产生的磁场进行测量，由泥浆将数据传输至地面经计算确定出已钻井相对于正钻井的距离和方位。这种工具的缺点是必须在已钻邻井中下入电缆，这样会影响生产井的正常生产，并且需要动用大量的工具设备来完成此项工作。RMRS系统是主要应用于蒸汽辅助重力泄油中随钻指导注入井平行于生产井钻进的辅助工具，同时该系统也能够应用于丛式井正钻井防碰钻进。虽然该工具在平行井距离控制方面准确度较高，但是用于正钻井防碰时还需要对该系统改进，同时由于防碰监测时需要在已钻井中下入探管进行引导，因此防碰监测工作量大，使用不方便。电磁铁防碰实时测距系统使用的是两个磁矩大小相等，方向相反的电磁铁关于磁通门传感器测点反向排列，实时测量周期旋转磁化场用于计算正钻井与已钻井之间的距离，用于丛式井随钻测距防碰。该方法实验测试效果较好，但要发挥该工具的有效性则要求安装于钻头后端的无磁钻铤仪器长度必须达到1.2m以上，这势必会影响钻井的导向功能。同时，该工具要求大电流供电并且要求很高的线圈匝数来产生较大的磁场，其实际应用具有一点难度。The working principle of the SWG system is to run a cable into the drilled well and pass a constant current, so that a fixed magnetic field will be generated around the cable, and the magnetic field generated by the cable will be measured by the magnetic field measurement unit in the MWD near the drilling bit. , the data is transmitted from the mud to the ground to determine the distance and azimuth of the well being drilled relative to the well being drilled. The disadvantage of this tool is that the cable must be drilled in the adjacent well, which will affect the normal production of the production well, and a large number of tools and equipment must be used to complete the work. The RMRS system is an auxiliary tool mainly used in steam-assisted gravity drainage to guide the drilling of injection wells parallel to production wells. At the same time, the system can also be used in anti-collision drilling of cluster wells. Although this tool has high accuracy in controlling the distance of parallel wells, it needs to be improved when it is used for anti-collision in drilling. The monitoring workload is heavy and inconvenient to use. The electromagnet anti-collision real-time ranging system uses two electromagnets with equal magnetic moments and opposite directions to be arranged in reverse with respect to the fluxgate sensor measuring points, and the real-time measurement period rotating magnetization field is used to calculate the distance between drilling and drilling. The distance is used for ranging-while-drilling and anti-collision in cluster wells. The experimental results of this method are good, but to make full use of the effectiveness of the tool, the length of the non-magnetic drill collar installed at the rear end of the drill bit must be more than 1.2m, which will inevitably affect the steering function of drilling. At the same time, the tool requires a large current power supply and requires a high number of coil turns to generate a large magnetic field, and its practical application is a little difficult.
发明内容Contents of the invention
本发明针对目前丛式井钻井测距与防碰监测方法存在的不足，提出一种反磁矩补偿磁化场随钻旋转测距装置及测距防碰方法，该装置能够随钻实时测量正钻井与邻井之间的距离，不需要停钻，也不需要在另一口井中下入其他引导设备，不影响已钻井的作业。同时，该方法采用磁测点近距离反磁矩补偿，能够有效增强旋转磁化场大小，提高磁场测距有效性；该磁测距仪器较短，能够极大减小或消处仪器工具对钻井导向的影响；且该工具采用永磁铁磁源，仪器设计制作及工作更加方便。Aiming at the deficiencies in the current method of cluster well drilling distance measurement and anti-collision monitoring, the present invention proposes a diamagnetic moment compensation magnetization field rotating distance measurement device while drilling and a distance measurement anti-collision method. The device can measure the positive drilling in real time while drilling The distance from adjacent wells does not need to stop drilling, nor does it need to run other guiding equipment in another well, and does not affect the operation of the already drilled well. At the same time, the method uses short-distance diamagnetic moment compensation at magnetic measuring points, which can effectively enhance the size of the rotating magnetization field and improve the effectiveness of magnetic field ranging; the magnetic ranging instrument is relatively short, which can greatly reduce or eliminate the impact of tools on drilling The influence of orientation; and the tool uses a permanent magnet magnetic source, making the design and work of the instrument more convenient.
为了解决上述技术问题，本发明采用如下技术方案：In order to solve the above technical problems, the present invention adopts the following technical solutions:
本发明公开了一种反磁矩补偿磁化场随钻旋转测距装置，包括永磁铁组、反向补偿电磁铁及磁场测量传感器，所述永磁铁组、所述反向补偿电磁铁及所述磁场测量传感器成一条直线安装在钻头与无磁钻铤之间。The invention discloses a diamagnetic moment compensation magnetization field rotation distance measuring device while drilling, which comprises a permanent magnet group, a reverse compensation electromagnet and a magnetic field measurement sensor, the permanent magnet group, the reverse compensation electromagnet and the The magnetic field measurement sensor is installed in a straight line between the drill bit and the non-magnetic drill collar.
进一步，所述永磁铁组包括多个表面磁感应强度约为1.5T(或更高)的等效磁矩同向平行排列的柱状永磁铁。Further, the permanent magnet group includes a plurality of columnar permanent magnets with surface magnetic induction of about 1.5T (or higher) and equivalent magnetic moments arranged in parallel in the same direction.
进一步，所述反向补偿电磁铁的等效磁矩与所述柱状永磁铁等效磁矩方向相反。Further, the direction of the equivalent magnetic moment of the reverse compensation electromagnet is opposite to that of the columnar permanent magnet.
进一步，所述磁场测量传感器为单轴磁场传感器，其磁场测点位于该旋转测距装置的轴线上，磁场测量方向与所述轴线垂直，通过调整所述反向补偿电磁铁电流使得旋转轴处测点垂向磁场小于0.1nT。Further, the magnetic field measuring sensor is a single-axis magnetic field sensor, and its magnetic field measuring point is located on the axis of the rotating distance measuring device, and the magnetic field measuring direction is perpendicular to the axis. By adjusting the current of the reverse compensation electromagnet, the rotation axis is The vertical magnetic field at the measuring point is less than 0.1nT.
本发明还公开了一种反磁矩补偿磁化场随钻旋转测距防碰方法，该方法包括以下步骤：The invention also discloses a anti-collision method for diamagnetic moment compensation and magnetization field rotation while drilling for distance measurement and collision prevention. The method includes the following steps:
步骤一，将永磁铁组、反向补偿电磁铁及磁场测量传感器固定安装在一根无磁金属短接中构成反磁矩补偿磁化场随钻旋转测距装置，无磁短接测距装置安装在无磁钻铤与钻头之间；Step 1, fixedly install the permanent magnet group, reverse compensation electromagnet and magnetic field measurement sensor in a non-magnetic metal short-circuit to form a reverse magnetic moment compensation magnetization field rotating ranging device while drilling, and install the non-magnetic short-circuit distance measuring device Between the non-magnetic drill collar and the drill bit;
步骤二，无磁短接测距装置随着钻杆一起转动，当正钻井周围不存在已钻井套管时，磁场传感器测量垂向磁化场周期波动接近0nT；当正钻井周围防碰范围内存在已钻井套管时，磁场传感器测量到周期性的磁化场波动，波动峰峰值大小满足式(1)函数关系：Step 2: The non-magnetic short-circuit ranging device rotates together with the drill pipe. When there is no drilled casing around the drilling, the magnetic field sensor measures the periodic fluctuation of the vertical magnetization field close to 0nT; When the casing is drilled, the magnetic field sensor measures periodic magnetization field fluctuations, and the peak-to-peak fluctuations satisfy the functional relationship of formula (1):
Bpp＝f(ma1,ma2,…,maN,χa,φ,δ,D)(1)Bpp ＝f(ma1 ,ma2 ,…,maN ,χa ,φ,δ,D)(1)
式(1)中ma1,ma2,…,maN为永磁铁组每个永磁铁的等效磁矩，χa为已钻邻井套管的有效磁化率，φ为套管的外径，δ为套管的厚度，这些参数在进行磁场测距防碰前测量得到，为已知变量，即式(1)可变为旋转垂向磁场峰峰值Bpp关于正钻井磁测点邻井距离D的单变量函数：In formula (1), ma1 , ma2 ,..., maN is the equivalent magnetic moment of each permanent magnet in the permanent magnet group, χa is the effective magnetic susceptibility of the casing in the drilled adjacent well, and φ is the outer diameter of the casing , δ is the thickness of the casing, these parameters are measured before the magnetic field ranging and anti-collision, and are known variables, that is, the formula (1) can be changed to the peak-to-peak value of the rotating vertical magnetic field Bpp for the adjacent well at the magnetic measuring point of the drilling Univariate function of distance D:
Bpp＝f(D)(2)Bpp =f(D)(2)
步骤三，通过MDR建立反磁矩补偿磁化场随钻旋转计算模型，在式(1)已知参数和测量得到垂向磁场磁Bpp的条件下，使用粒子群优化算法和反磁矩补偿磁化场随钻旋转计算模型，找到使得计算垂向磁场峰峰值与测量垂向磁场峰峰值差异尽量小的距离D，调整正钻井实时钻进使得正钻井钻头保持在安全钻进范围内，以实现正钻井与邻井之间的随钻防碰。Step 3: Establish the rotation-while-drilling calculation model of the diamagnetic moment compensation magnetization field throughMDR , and use the particle swarm optimization algorithm and the diamagnetic moment compensation magnetization The field rotation while drilling calculation model is used to find the distance D that makes the difference between the peak-to-peak value of the calculated vertical magnetic field and the peak-to-peak value of the measured vertical magnetic field as small as possible, and adjust the real-time drilling of the positive drilling to keep the bit of the positive drilling within the safe drilling range to achieve positive Anti-collision while drilling between drilling well and adjacent well.
本发明的有益效果：Beneficial effects of the present invention:
本发明提供的这种反磁矩补偿磁化场随钻旋转测距装置能够随钻实时测量正钻井与邻井之间的距离，不需要停钻，也不需要在另一口井中下入其他引导设备，不影响已钻井的作业。同时，这种反磁矩补偿磁化场随钻旋转测距防碰方法采用磁测点近距离反磁矩补偿，能够有效增强旋转磁化场大小，提高磁场测距有效性；该磁测距仪器较短，能够有效减小或消处仪器工具对钻井导向的影响；且该工具采用永磁铁磁源，仪器设计制作及工作更加方便。The diamagnetic moment compensation magnetization field rotating distance measuring device while drilling provided by the present invention can measure the distance between the well being drilled and the adjacent well in real time while drilling, without stopping the drilling or installing other guiding equipment in another well , does not affect the operation of the well already drilled. At the same time, this diamagnetic moment compensation magnetization field rotation and ranging anti-collision method while drilling uses the magnetic measuring point short-distance diamagnetic moment compensation, which can effectively enhance the size of the rotating magnetization field and improve the effectiveness of magnetic field ranging; Short, can effectively reduce or eliminate the influence of tools and tools on drilling guidance; and the tool uses a permanent magnet magnetic source, making the design and work of the tool more convenient.
附图说明Description of drawings
下面结合附图和具体实施方式对本发明作进一步详细的说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1为本发明反磁矩补偿磁化场随钻旋转测距装置结构剖面示意图；Fig. 1 is the schematic cross-sectional view of the structure of the diamagnetic moment compensation magnetization field-while-drilling rotary ranging device of the present invention;
图中：1、永磁铁组；2、反向补偿电磁铁；3、磁场测量传感器。In the figure: 1. Permanent magnet group; 2. Reverse compensation electromagnet; 3. Magnetic field measurement sensor.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
如图1所示为本发明的一种实施例，一种反磁矩补偿磁化场随钻旋转测距装置，包括永磁铁组1、反向补偿电磁铁2及磁场测量传感器3安装在无磁金属短接中，所述永磁铁组1、所述反向补偿电磁铁2及所述磁场测量传感器3成一条直线，防碰无磁金属短接安装在钻头与无磁钻铤之间。所述永磁铁组1包括八个表面磁感应强度约1.5T的同向磁矩排列的正四边形柱状永磁铁。As shown in Figure 1, it is an embodiment of the present invention, a kind of diamagnetic moment compensation magnetization field while drilling rotary distance measuring device, comprising permanent magnet group 1, reverse compensation electromagnet 2 and magnetic field measurement sensor 3 installed in non-magnetic In the metal short, the permanent magnet group 1, the reverse compensation electromagnet 2 and the magnetic field measurement sensor 3 are in a straight line, and the anti-collision non-magnetic metal short is installed between the drill bit and the non-magnetic drill collar. The permanent magnet group 1 includes eight regular quadrilateral columnar permanent magnets arranged in the same direction with a surface magnetic induction of about 1.5T.
利用此测距装置进行反磁矩补偿磁化场随钻旋转防碰测距步骤为：Using this distance measuring device to perform diamagnetic moment compensation and magnetization field rotation while drilling anti-collision distance measurement steps are as follows:
步骤一，将永磁铁组、反向补偿电磁铁及磁场测量传感器固定安装在一根无磁金属固定短接中构成反磁矩补偿磁化场随钻旋转测距装置；八个边长为3.5cm，长度为12cm的正四边形柱状永磁铁分两排平行排列，等效磁矩方向与无磁短接轴线垂直，永磁铁组中心位于短接轴线上；磁场测传感器采用单轴磁通门传感器，精度为0.1nT，垂直于无磁短接轴线安装，传感器测点位于短接轴线上距离永磁铁组中心0.4m；补偿电磁铁圆柱体铁芯长为5cm，半径为1cm，圆柱轴线垂直于短接轴线，中心在短接轴线上位于传感器测点和永磁铁组中心之间，且距离测点5cm。在磁屏蔽环境中通过调整电磁铁电流，使得测点处磁场抵消后传感器测量磁场不高于0.1nT。固定此时的永磁铁组、磁场传感器及补偿电磁铁。采用恒流源稳定电磁铁供电电流。Step 1, fixedly install the permanent magnet group, reverse compensation electromagnet and magnetic field measurement sensor in a non-magnetic metal fixed short circuit to form a reverse magnetic moment compensation magnetization field rotating distance measuring device while drilling; the length of the eight sides is 3.5cm , the regular quadrilateral columnar permanent magnets with a length of 12cm are arranged in two parallel rows, the direction of the equivalent magnetic moment is perpendicular to the non-magnetic short-circuit axis, and the center of the permanent magnet group is located on the short-circuit axis; the magnetic field measurement sensor adopts a single-axis fluxgate sensor, The accuracy is 0.1nT, installed perpendicular to the non-magnetic short-circuit axis, the sensor measuring point is located on the short-circuit axis and 0.4m away from the center of the permanent magnet group; the length of the compensation electromagnet cylinder is 5cm, the radius is 1cm, and the cylinder axis is perpendicular to the short-circuit Connecting the axis, the center is located between the measuring point of the sensor and the center of the permanent magnet group on the shorting axis, and is 5cm away from the measuring point. In the magnetic shielding environment, by adjusting the electromagnet current, the magnetic field measured by the sensor after the magnetic field at the measuring point is canceled is not higher than 0.1nT. Fix the permanent magnet group, magnetic field sensor and compensation electromagnet at this time. A constant current source is used to stabilize the supply current of the electromagnet.
步骤二，无磁短接测距装置安装在无磁钻铤与钻头之间随着钻杆一起转动，当正钻井周围不存在已钻井套管时，磁场传感器测量垂向磁化场周期波动接近0nT；当正钻井周围防碰范围内存在已钻井套管时，磁场传感器测量到周期性的磁化场波动，磁场波动峰峰值大小满足式(1)函数关系：Step 2. The non-magnetic short-circuit distance measuring device is installed between the non-magnetic drill collar and the drill bit and rotates with the drill pipe. When there is no drilled casing around the drilling, the magnetic field sensor measures the periodic fluctuation of the vertical magnetization field close to 0nT ; When there is drilling casing in the anti-collision range around the drilling, the magnetic field sensor measures the periodic magnetization field fluctuation, and the peak-to-peak value of the magnetic field fluctuation satisfies the functional relationship of formula (1):
Bpp＝f(ma1,ma2,…,maN,χm,φ,δ,D)(1)Bpp ＝f(ma1 ,ma2 ,…,maN ,χm ,φ,δ,D)(1)
式(1)中ma1,ma2,…,maN为永磁铁组每个永磁铁的等效磁矩，χm为已钻邻井套管的材料磁化率，φ为套管的外径，δ为套管的厚度，这些参数在进行磁场测距防碰前测量得到，为已知变量，即式(1)可变为旋转垂向磁场峰峰值Bpp关于正钻井磁测点到邻井距离D的单变量函数：In formula (1), ma1 , ma2 ,..., maN is the equivalent magnetic moment of each permanent magnet in the permanent magnet group, χm is the material magnetic susceptibility of the drilled adjacent well casing, and φ is the outer diameter of the casing , δ is the thickness of the casing. These parameters are measured before the magnetic field ranging and anti-collision. They are known variables, that is, the formula (1) can be converted into the peak-to-peakvalue of the rotating vertical magnetic field. Univariate function of well distance D:
Bpp＝f(D)(2)Bpp =f(D)(2)
通过MDR建立反磁矩补偿磁化场随钻旋转计算模型，测量得到套管参数，在近地表测试井已知距离D的前提下，通过修正退磁因子，建立反磁矩补偿磁化场随钻旋转计算模型中防碰距离D与旋转垂向磁场峰峰值Bpp之间的准确计算关系。The rotation-while-drilling calculation model of the diamagnetic moment compensation magnetization field is established by MDR, and the casing parameters are measured. On the premise of the known distance D of the near-surface test well, the demagnetization factor is corrected to establish the diamagnetic moment compensation magnetization field rotation-while-drilling calculation. The accurate calculation relationship between the anti-collision distance D and the peak-to-peak value Bpp of the rotating vertical magnetic field in the model.
步骤三，将无磁短接测距装置安装在无磁钻铤与钻头之间随正钻井钻头一起钻进，井下磁场测量装置在钻杆每旋转一圈采集360个数据，每1～10圈(其它大于1圈的磁场采样值也适用，6圈较佳)计算一次旋转垂向磁场峰峰值Bpp的平均值。随钻过程中，旋转垂向磁场峰峰值Bpp的平均值实时传输至地面计算机，在步骤二建立的防碰距离D与旋转垂向磁场峰峰值Bpp之间准确计算关系的条件下，使用粒子群优化算法找到使得计算垂向磁场峰峰值与随钻测量垂向磁场峰峰值平均值差异尽量小的距离D'，此距离D'即为测点到邻井之间的距离。调整正钻井实时钻进使得正钻井钻头保持在安全钻进范围内，以实现正钻井与邻井之间的随钻防碰。Step 3: Install the non-magnetic short-circuit ranging device between the non-magnetic drill collar and the drill bit to drill together with the drill bit. The downhole magnetic field measurement device collects 360 data per revolution of the drill pipe, and every 1 to 10 revolutions (Other magnetic field sampling values greater than 1 turn are also applicable, 6 turns is better) Calculate the average value of the peak-to-peak value Bpp of the vertical magnetic field for one rotation. During the drilling process, the average value of the peak-to-peak value of the rotating vertical magnetic field Bpp is transmitted to the ground computer in real time. Under the condition of the accurate calculation relationship between the anti-collision distance D established in step 2 and the peak-to-peak value of the rotating vertical magnetic field Bpp , use The particle swarm optimization algorithm finds the distance D' that makes the difference between the peak-to-peak value of the calculated vertical magnetic field and the peak-to-peak average value of the vertical magnetic field measured while drilling as small as possible. This distance D' is the distance between the measuring point and the adjacent well. Adjust the real-time drilling of the well being drilled so that the drill bit of the well being drilled remains within the safe drilling range, so as to realize the anti-collision while drilling between the well being drilled and the adjacent well.
本发明提供的这种反磁矩补偿磁化场随钻旋转测距装置能够随钻实时测量正钻井与邻井之间的距离，不需要停钻，也不需要在另一口井中下入其他引导设备，不影响已钻井的作业。同时，这种反磁矩补偿磁化场随钻旋转测距防碰方法采用磁测点近距离反磁矩补偿，能够有效增强旋转磁化场大小，提高磁场测距有效性；该磁测距仪器较短，能够有效减小或消处仪器工具对钻井导向的影响；且该工具采用永磁铁磁源，仪器设计制作及工作更加方便。The diamagnetic moment compensation magnetization field rotating distance measuring device while drilling provided by the present invention can measure the distance between the well being drilled and the adjacent well in real time while drilling, without stopping the drilling or installing other guiding equipment in another well , does not affect the operation of the well already drilled. At the same time, this diamagnetic moment compensation magnetization field rotation and ranging anti-collision method while drilling uses the magnetic measuring point short-distance diamagnetic moment compensation, which can effectively enhance the size of the rotating magnetization field and improve the effectiveness of magnetic field ranging; Short, can effectively reduce or eliminate the influence of tools and tools on drilling guidance; and the tool uses a permanent magnet magnetic source, making the design and work of the tool more convenient.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610009640.8ACN105649613A (en) | 2016-01-05 | 2016-01-05 | Reverse magnetic moment compensation magnetic field while-drilling rotating ranging device and ranging anti-collision method |
| Application Number | Priority Date | Filing Date | Title |
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| CN201610009640.8ACN105649613A (en) | 2016-01-05 | 2016-01-05 | Reverse magnetic moment compensation magnetic field while-drilling rotating ranging device and ranging anti-collision method |
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| CN105649613Atrue CN105649613A (en) | 2016-06-08 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201610009640.8APendingCN105649613A (en) | 2016-01-05 | 2016-01-05 | Reverse magnetic moment compensation magnetic field while-drilling rotating ranging device and ranging anti-collision method |
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