CN102052071A - Frustum cylinder-shaped near wellbore zone shear simulation device with sand prevention compacted sand bodies - Google Patents

Abstract

The invention provides a frustum cylinder-shaped near wellbore zone shear simulation device with sand prevention compacted sand bodies. The device comprises a frustum-shaped cylinder which consists of a frustum cylinder and a columnar cylinder which is arranged at a small-aperture end of the frustum cylinder, wherein the frustum-shaped cylinder is provided with a sealing cover A and a sealing cover B; the sealing cover A is positioned at the columnar cylinder end; the sealing cover B is positioned at the frustum cylinder end; the sealing cover A and the sealing cover B are provided with a sealing pipeline joint a and a sealing pipeline joint b respectively; a circular column which is in interference fit with the columnar cylinder is arranged in the columnar cylinder; a cemented sand body is arranged between the lower surface of the circular column and the sealing cover B and is provided with a columnar hole which is communicated with the inner cavity of the circular column; and the compacted sand bodies are arranged in the columnar hole, in the inner cavity of the circular column and between the upper surface of the circular column and the sealing cover A. The shear simulation device provided by the invention can be widely applied to a process for enhancing recovery ratio in oilfield chemical flooding.

Description

Translated fromChinese

带有防砂压实砂体的圆台筒体状近井地带剪切模拟装置Shear simulation device for near-wellbore zone in the shape of a circular platform and a cylinder with sand control and compaction

技术领域technical field

本发明涉及一种近井地带剪切模拟装置，属于油田注聚领域中提高采收率的室内模拟工艺中的近井地带剪切模拟装置。The invention relates to a near-well zone shear simulation device, which belongs to the near-well zone shear simulation device in the indoor simulation process of enhancing recovery in the field of polymer injection in oil fields.

背景技术Background technique

聚合物驱已成为油田开发过程中提高采收率的重要技术之一。在注聚方案的设计阶段，聚合物溶液性能对注聚方案设计起着至关重要的作用，方案设计中涉及的关于聚合物溶液性能的参数均应为实际油藏条件下溶液的性能，对于这些实际油藏条件下的粘度、流变性等参数，目前获取的途径分为现场获取和室内模拟获取两种，现场获取就是在注聚过程中通过钻取样井取样或者在注聚井进行注氮气返排取样(耿玉广，李善维，翁燕萍等.华北油田三次采油先导性试验研究[J].钻采工艺.1998；张振华等.聚合物驱油现场先导试验技术[M].北京：聚合物驱油现场先导试验技术，1996：207；王友启，张以根，姜颜波等.影响聚合物矿场实施效果的几个问题[J].油田化学.1999：244-246.)；室内只能通过对聚合物溶液的模拟剪切得到其近井地带剪切后的溶液性能，模拟剪切方法的准确性直接影响到油藏方案编制、动态跟踪和实施预测的合理性与准确性，最终影响注聚开发效果。目前，室内研究近井地带剪切对聚合物溶液性能的影响，主要采用WARING搅拌器(张群志，赵文强，陈素萍等.不同剪切方式对聚合物溶液及凝胶性能的影响[J].油田化学.2008：256-260；中国海洋石油总公司技术标准.海上油田驱油用丙烯酰胺类耐盐聚合物的性能指标和检测方法[S].中国海洋石油总公司，2006.)、岩心压差剪切(中国海洋石油总公司技术标准.海上油田驱油用丙烯酰胺类耐盐聚合物的性能指标和检测方法[S].中国海洋石油总公司，2006；杨怀军，张杰，张景春.缔合聚合物溶液岩芯剪切流变行为研究[J].西南石油大学学报.2007：102-105；中国石油天然气总公司技术标准.驱油用丙烯酰胺类聚合物性能测定[S].中国石油天然气总公司，1993：1994-1-6.)、毛细管剪切(周海刚，杜灿敏，刑志军.聚合物在注聚管道中降解的模拟研究[J].2003：247-249；中国石油天然气总公司技术标准.驱油用丙烯酰胺类聚合物性能测定[S].中国石油天然气总公司，2007.)、近井地带速率剪切模拟实验装置(舒政，叶仲斌，张健等.聚合物溶液近井地带速率剪切模拟实验装置设计[J].油气地质与采收率.2010：55-58.)等方法进行研究。利用WARING搅拌器剪切聚合物溶液实际上是纯粹的机械剪切，由于剪切方式与地层渗流剪切方式的差异，因此它并不能真实反映聚合物溶液进入地层时被剪切的实际情况。岩心剪切的方法是利用注入泵使中间容器中的聚合物溶液通过装有模拟岩心的岩心夹持器，从而实现对聚合物溶液的剪切；该方法需要的设备主要包括注入泵，中间容器，岩心夹持器等部件，在一定程度上可以模拟聚合物溶液受剪切以后的溶液性能，但是该方法由于剪切速度是不连续变化的，只能模拟地层中某个点的剪切，不能模拟近井地带流速连续剧烈变化导致的对聚合物的剪切及其他作用。毛细管剪切由于是聚合物在毛细管内部的流动产生的，其流动状态为管流，与地层渗流的流动状态不同，剪切方式与地层渗流剪切也不同，因此它也不能真实反映聚合物溶液进入地层时被剪切的实际情况；近井地带速率剪切模拟实验装置的核心仍然是岩心剪切，只是采用填砂管来代替岩心，为了实现剪切速率的变化，采用了3根不同直径的填砂管，通过改变注入速度以实现不同速率的剪切，聚合物溶液经历第一段填砂管剪切后再经历第二根填砂管剪切，最后经历第3段填砂管剪切，每根填砂管剪切后，聚合物溶液有一个放置和收集的过程，然后才会进行后面一根填砂管剪切，这个过程与实际的近井地带剪切工艺不符合。Polymer flooding has become one of the important techniques for enhancing oil recovery in oilfield development. In the design stage of the polymer injection scheme, the performance of the polymer solution plays a crucial role in the design of the polymer injection scheme. The parameters related to the performance of the polymer solution involved in the scheme design should be the performance of the solution under the actual reservoir conditions. These parameters such as viscosity and rheology under actual reservoir conditions are currently obtained in two ways: on-site acquisition and indoor simulation acquisition. On-site acquisition is through drilling sample wells during the polymer injection process or nitrogen injection in polymer injection wells Flowback Sampling (Geng Yuguang, Li Shanwei, Weng Yanping et al. Pilot Experimental Research on Tertiary Oil Recovery in Huabei Oilfield [J]. Drilling and Production Technology. 1998; Zhang Zhenhua et al. Field Pilot Experimental Technology of Polymer Flooding [M]. Beijing: Polymer Flooding On-site pilot test technology, 1996: 207; Wang Youqi, Zhang Yigen, Jiang Yanbo, etc. Several issues affecting the implementation effect of polymer mines [J]. Oilfield Chemistry. 1999: 244-246.); Indoors can only pass through the polymer solution The simulated shearing method can be used to obtain the solution properties after shearing in the near-wellbore zone. The accuracy of the simulated shearing method directly affects the rationality and accuracy of reservoir planning, dynamic tracking and implementation prediction, and ultimately affects the effect of polymer injection development. At present, the indoor research on the effect of shearing in the near-wellbore zone on the properties of polymer solutions mainly uses WARING agitators (Zhang Qunzhi, Zhao Wenqiang, Chen Suping, etc. Effects of different shearing methods on the properties of polymer solutions and gels[J]. Oilfield Chemistry .2008: 256-260; Technical Standards of China National Offshore Oil Corporation. Performance indicators and testing methods of acrylamide salt-tolerant polymers used in offshore oilfield flooding [S]. China National Offshore Oil Corporation, 2006.), core pressure difference Shearing (Technical Standards of China National Offshore Oil Corporation. Performance indicators and detection methods of acrylamide salt-tolerant polymers used in offshore oilfield flooding [S]. China National Offshore Oil Corporation, 2006; Yang Huaijun, Zhang Jie, Zhang Jingchun. Association polymerization Study on Shear Rheological Behavior of Solid Solution Core[J]. Southwest Petroleum University Journal. 2007: 102-105; China National Petroleum Corporation Technical Standard. Performance Determination of Acrylamide Polymers for Oil Displacement [S]. China Petroleum and Natural Gas Headquarters, 1993: 1994-1-6.), capillary shearing (Zhou Haigang, Du Canmin, Xing Zhijun. Simulation research on polymer degradation in polymer injection pipelines [J]. 2003: 247-249; China Petroleum and Natural Gas Corporation Company Technical Standards. Performance Determination of Acrylamide Polymers for Oil Displacement [S]. China National Petroleum Corporation, 2007.), Near Well Zone Velocity Shear Simulation Experimental Device (Shu Zheng, Ye Zhongbin, Zhang Jian, etc. Polymer Solution Design of experimental device for rate-shear simulation in near-wellbore [J]. Oil and Gas Geology and Recovery. 2010: 55-58.) and other methods for research. Shearing the polymer solution with a WARING agitator is actually pure mechanical shearing. Due to the difference between the shearing method and the formation seepage shearing method, it cannot truly reflect the actual situation of the polymer solution being sheared when it enters the formation. The method of core shearing is to use the injection pump to make the polymer solution in the intermediate container pass through the core holder equipped with simulated rock core, so as to realize the shearing of the polymer solution; the equipment required for this method mainly includes injection pump, intermediate container , core holders and other components can simulate the performance of the polymer solution after being sheared to a certain extent, but this method can only simulate the shear at a certain point in the formation because the shear rate changes discontinuously. The shear and other effects on the polymer caused by continuous and severe changes in the flow rate near the wellbore cannot be simulated. Capillary shear is generated by the flow of polymer inside the capillary, and its flow state is pipe flow, which is different from the flow state of formation seepage, and the shearing method is also different from that of formation seepage shear, so it cannot truly reflect the polymer solution. The actual situation of being sheared when entering the formation; the core of the near-wellbore zone rate shear simulation experiment device is still the core shear, but the sand filling tube is used instead of the core. In order to realize the change of the shear rate, three tubes with different diameters are used. Different rates of shearing can be achieved by changing the injection rate. The polymer solution undergoes the shearing of the first sand-filling pipe, then the shearing of the second sand-filling pipe, and finally the shearing of the third sand-filling pipe. After each sand-packing pipe is cut, the polymer solution has a process of placing and collecting, and then the following sand-packing pipe is cut. This process does not conform to the actual near-wellbore shearing process.

综上，现有的模拟剪切方法在剪切方式、剪切距离、剪切强度、剪切介质等多方面与实际情况存在差异，导致现有的评价方法不能很好的评价近井地带剪切对聚合物溶液性能产生的影响，因此在室内模拟过程中存在局限性。In summary, the existing simulated shearing methods are different from the actual situation in many aspects such as shearing mode, shearing distance, shearing strength, shearing medium, etc. Therefore, there are limitations in the indoor simulation process.

发明内容Contents of the invention

本发明的目的是提供一种能够在剪切方式、剪切距离、剪切强度、剪切介质等方面都与实际情况吻合的近井地带模拟装置，通过装置形状的变化实现剪切强度和剪切距离的变化，通过采用相同或相似的渗流介质实现剪切方式的一致，使得模拟的近井地带渗流环境更加接近实际情况。The purpose of the present invention is to provide a near-wellbore simulation device that can match the actual situation in terms of shearing mode, shearing distance, shearing strength, and shearing medium. By using the same or similar seepage media to achieve the same shear mode, the simulated seepage environment near the wellbore is closer to the actual situation.

本发明提供的一种近井地带剪切模拟装置包括由圆台筒体与设置在所述圆台筒体小口径端的圆柱筒体组成的圆台状筒体；所述圆台状筒体上设有密封盖A和密封盖B；所述密封盖A位于所述圆柱筒体端，所述密封盖B位于所述圆台筒体端，所述密封盖A和密封盖B上分别设有密封管线接头a和密封管线接头b；所述圆柱筒体内设有与之过盈配合的圆环柱体；所述圆环柱体的下表面与所述密封盖B之间设有胶结砂体，所述胶结砂体内设有与所述圆环柱体的内腔相连通的圆柱孔；所述圆柱孔中、所述圆环柱体的内腔中和所述圆环柱体的上表面和所述密封盖A之间均设有压实砂体。A near-wellbore shear simulation device provided by the present invention includes a frustum-shaped cylinder body composed of a frustum-shaped cylinder body and a cylindrical cylinder body arranged at the small-diameter end of the cone-shaped cylinder body; a sealing cover is provided on the frustum-shaped cylinder body A and sealing cover B; the sealing cover A is located at the end of the cylinder body, the sealing cover B is located at the end of the cylindrical body, and the sealing cover A and the sealing cover B are respectively provided with sealing pipeline joints a and Seal the pipeline joint b; the cylindrical cylinder body is provided with a circular cylinder with an interference fit; a cemented sand body is provided between the lower surface of the circular cylinder and the sealing cover B, and the cemented sand The body is provided with a cylindrical hole communicating with the inner cavity of the circular cylinder; in the cylindrical hole, in the inner cavity of the circular cylindrical body, and on the upper surface of the circular cylindrical body and the sealing cover There are compacted sand bodies between A.

上述的模拟装置，所述密封盖A和密封盖B与所述圆台状筒体均为螺纹密封连接或过盈配合，为所述圆台状筒体起到密封作用。所述密封盖A和密封盖B均可以由能承受一定压力的材料制成。In the above-mentioned simulation device, the sealing cover A and the sealing cover B and the frustum-shaped cylindrical body are both threaded and sealed or have an interference fit, which serve as a seal for the frusto-conical cylindrical body. Both the sealing cover A and the sealing cover B can be made of materials capable of withstanding a certain pressure.

上述的模拟装置，所述密封盖A与所述密封管线接头a为螺纹密封连接或过盈配合，所述密封管线接头a可与室内驱替管线紧密衔接以提供液流通道。In the above-mentioned simulation device, the sealing cover A and the sealing pipeline joint a are in a threaded sealing connection or interference fit, and the sealing pipeline joint a can be tightly connected with the indoor displacement pipeline to provide a liquid flow channel.

上述的模拟装置，所述密封盖B与所述密封管线接头b为螺纹密封连接或过盈配合，所述密封管线接头b可与室内驱替管线紧密衔接以提供液流通道。In the above-mentioned simulation device, the sealing cover B and the sealing pipeline joint b are in a threaded sealing connection or interference fit, and the sealing pipeline joint b can be tightly connected with the indoor displacement pipeline to provide a liquid flow channel.

上述的模拟装置，所述圆台状筒体上设有至少一个取样口；所述取样口上设有密封盖C；所述密封盖C与所述圆台状筒体为螺纹密封连接或过盈配合。通过所述取样口可以获取驱替工作液样品，从而可以测试其压力等参数。在不使用的时候可以使用密封盖C封闭所述取样口的通道。In the above-mentioned simulation device, at least one sampling port is provided on the frustum-shaped cylinder; a sealing cap C is provided on the sampling port; the sealing cap C and the frusto-conical cylinder are in threaded sealing connection or interference fit. A sample of the displacement working fluid can be obtained through the sampling port, so that parameters such as its pressure can be tested. When not in use, the sealing cap C can be used to close the channel of the sampling port.

上述的模拟装置，所述取样口的个数可以根据需要进行调节。In the above-mentioned simulation device, the number of the sampling ports can be adjusted as required.

上述的模拟装置，所述圆环柱体为圆环水泥柱体、圆环不锈钢柱体或圆环合金钢柱体；所述圆环柱体的下表面和所述圆柱筒体与所述圆台筒体的交界面重合；所述圆环柱体的厚度可以根据实际套管尺寸与钻井采用钻头尺寸及其扩径情况确定，所述圆环柱体的内环直径与实际目标井的射孔弹型号匹配。In the above-mentioned simulation device, the annular cylinder is an annular cement cylinder, an annular stainless steel cylinder or an annular alloy steel cylinder; the lower surface of the annular cylinder and the cylindrical body and the circular platform The interface of the cylinder body coincides; the thickness of the circular cylinder can be determined according to the actual casing size and the drill bit size used for drilling and its diameter expansion. The bomb model matches.

上述的模拟装置，所述圆柱孔的直径大于或等于所述圆环柱体的内环直径；所述圆柱孔的高度小于所述胶结砂体的高度；所述圆柱孔用来模拟射孔炮眼，其内环直径和高度取决于拟模拟的射孔弹型号参数。In the above simulation device, the diameter of the cylindrical hole is greater than or equal to the diameter of the inner ring of the circular cylinder; the height of the cylindrical hole is smaller than the height of the cemented sand body; the cylindrical hole is used to simulate the perforation blast hole , the diameter and height of the inner ring depend on the model parameters of the perforating charge to be simulated.

上述的模拟装置，所述压实砂体近所述密封盖A的表面上设有过滤装置；所述过滤装置可为筛管、筛网或滤网；所述过滤装置主要用来模拟油井内的防砂筛管。The above-mentioned simulation device, the compacted sand body is provided with a filter device on the surface near the sealing cover A; the filter device can be a screen, a screen or a filter screen; the filter device is mainly used to simulate sand control screen.

上述的模拟装置，所述装置还包括设置在所述圆台筒体的下表面上的另一个圆柱筒体；该圆柱筒体可以用于与密封盖B连接，形成封闭腔体；也可以在所述装置长度不能满足需要的时候，该圆柱筒体与后续其他装置连接；或因功能需要与其他装置连接但又不改变流动速度时，该圆柱筒体用于提供连接的螺纹等。The above-mentioned simulation device, the device also includes another cylindrical body arranged on the lower surface of the cylindrical body; this cylindrical body can be used to connect with the sealing cover B to form a closed cavity; it can also be used in the When the length of the above-mentioned device cannot meet the needs, the cylindrical body is connected with other subsequent devices; or when the function needs to be connected with other devices without changing the flow velocity, the cylindrical body is used to provide thread for connection, etc.

上述的模拟装置，所述胶结砂体的渗透率和孔隙度与目标井的地层相关参数一致或相近，所采用的材质可为露头砂、石英砂、玻璃微珠或陶粒等。In the above-mentioned simulation device, the permeability and porosity of the cemented sand body are consistent or similar to the stratum-related parameters of the target well, and the material used may be outcrop sand, quartz sand, glass beads or ceramsite.

上述的模拟装置，所述压实砂体主要是用来模拟所述过滤装置与所述圆环柱体之间以及所述圆柱孔内为防砂而充填的砾石；所述压实砂体的渗透率和孔隙度与目标井的防砂参数一致或相近。In the above-mentioned simulation device, the compacted sand body is mainly used to simulate the gravel filled between the filter device and the circular cylinder and in the cylindrical hole for sand control; the penetration of the compacted sand body The ratio and porosity are consistent or similar to the sand control parameters of the target well.

本发明的剪切模拟装置由于采用了以上技术方案，可以模拟工作液在近井地带地层渗流时由于距离井筒中心距离的变化导致的渗流介质和渗流速度的变化；可以模拟由于渗流介质的变化导致的剪切方式变化；可以模拟近井地带剪切导致的聚合物溶液性能的变化。本发明提供的剪切模拟装置可以广泛应用于油田化学驱提高采收率工艺中。Due to the adoption of the above technical scheme, the shear simulation device of the present invention can simulate the change of seepage medium and seepage velocity caused by the change of the distance from the center of the wellbore when the working fluid seeps in the formation near the wellbore; it can simulate the change of the seepage medium caused by the change of the seepage medium. Changes in the shear mode of the wellbore; can simulate the change in the properties of the polymer solution caused by the shear in the near wellbore zone. The shear simulation device provided by the invention can be widely used in oil field chemical flooding enhanced recovery process.

附图说明Description of drawings

图1为本发明的近井地带剪切模拟装置的整体结构示意图。Fig. 1 is a schematic diagram of the overall structure of the near-wellbore zone shear simulation device of the present invention.

具体实施方式Detailed ways

下面结合附图对本发明作进一步说明，但本发明并不局限于以下实施例。The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

本发明的近井地带剪切模拟装置如图1所示，图中各标记如下：1密封管线接头a、2密封盖A、3筛管、4压实石英砂体、5开孔套管、6圆环水泥柱体、7圆柱孔、8取样口、9胶结石英砂体、10圆台筒体、11密封盖C、12密封管线接头b、13密封盖B、14，15圆柱筒体。The near-wellbore zone shear simulation device of the present invention is shown in Figure 1, and each label in the figure is as follows: 1 sealed pipeline joint a, 2 sealing cap A, 3 screen pipe, 4 compacted quartz sand body, 5 open-hole casing, 6 circular cement cylinder, 7 cylindrical hole, 8 sampling port, 9 cemented quartz sand body, 10 circular platform cylinder, 11 sealing cover C, 12 sealing pipeline joint b, 13 sealing cover B, 14, 15 cylindrical cylinder.

本发明的剪切模拟装置包括由圆台筒体10与分别设置在圆台筒体10的小口径端和大口径端的圆柱筒体14和圆柱筒体15组成的圆台状筒体，用于提供径向变化的渗流通道；圆台状筒体上设有密封盖A2和密封盖B13，用于对圆台状筒体起到封闭作用；密封盖A2和密封盖B13均由不锈钢制成；密封盖A2和密封盖B13均通过螺纹与圆台状筒体密封连接；密封盖A2上设有密封管线接头a1，密封盖A2与密封管线接头a1通过螺纹密封连接，用于与室内驱替管线紧密衔接以提供液流通道；密封盖B13上设有密封管线接头b12，密封盖B13与密封管线接头b12通过螺纹密封连接，用于与室内驱替管线紧密衔接以提供液流通道；圆台状筒体上设有3个取样口8，在需要的时候，可以将外界与圆台状筒体连通，从而获取工作液进行性能测试；取样口8上设有密封盖C11，在不使用的时候可以用密封盖C11封闭取样口8的通道；圆柱筒体14内设有与圆柱筒体14过盈配合的圆环水泥柱体6，圆环水泥柱体6的下表面和圆台筒体10与圆柱筒体14的交界面重合，圆环水泥柱体6上设有开孔套管5，开孔套管5的开孔大小与圆环水泥柱体6的内环直径相等；圆台筒体10内设有胶结石英砂体9，胶结石英砂体9的渗透率、孔隙度与目标井的地层相关参数一致；胶结石英砂体9内设有与圆环水泥柱体6的内腔相连通的圆柱孔7，用来模拟射孔炮眼，圆柱孔7的直径与圆环水泥柱体6的内环直径相等，圆柱孔7的高度小于胶结石英砂体9的高度；圆柱孔7中、圆环水泥柱体6的内腔中和开孔套管5与密封盖A2之间设有压实石英砂体4，压实石英砂体4的渗透率、孔隙度与目标井的地层相关参数一致，可以将砾石按照能够获得与模拟目标井的防砂参数(孔隙度、渗透率)条件下进行制作；压实石英砂体4的表面上设有筛管3，用来模拟实际油井防砂结构中的筛管。The shear simulation device of the present invention comprises a frustum-shaped cylindrical body composed of a cylindrical body 10 and a cylindrical body 14 and a cylindrical body 15 respectively arranged on the small-diameter end and the large-diameter end of the cylindrical body 10, for providing radial Changing seepage channels; the frustum-shaped cylinder is provided with a sealing cover A2 and a sealing cover B13 for sealing the frustum-shaped cylinder; both the sealing cover A2 and the sealing cover B13 are made of stainless steel; the sealing cover A2 and the sealing The cover B13 is sealed and connected with the circular frustum-shaped cylinder through threads; the sealing cover A2 is provided with a sealing pipeline joint a1, and the sealing cover A2 and the sealing pipeline joint a1 are connected through thread sealing, which is used to closely connect with the indoor displacement pipeline to provide liquid circulation The sealing cover B13 is provided with a sealing pipeline joint b12, and the sealing cover B13 and the sealing pipeline joint b12 are connected by thread sealing, which is used to closely connect with the indoor displacement pipeline to provide a liquid flow channel; there are 3 Sampling port 8, when needed, can connect the outside world with the frustum-shaped cylinder, so as to obtain working fluid for performance testing; sampling port 8 is provided with a sealing cover C11, which can be used to close the sampling port when not in use 8 channels; the cylindrical body 14 is provided with an annular cement cylinder 6 that is interference fit with the cylindrical body 14, and the lower surface of the annular cement cylinder 6 coincides with the interface between the circular table body 10 and the cylindrical body 14 , the annular cement cylinder 6 is provided with a perforated casing 5, and the size of the opening of the perforated casing 5 is equal to the diameter of the inner ring of the annular cement cylinder 6; , the permeability and porosity of the cemented quartz sand body 9 are consistent with the stratum-related parameters of the target well; the cemented quartz sand body 9 is provided with a cylindrical hole 7 communicating with the inner cavity of the annular cement cylinder 6 to simulate jetting The diameter of the cylindrical hole 7 is equal to the diameter of the inner ring of the annular cement cylinder 6, and the height of the cylindrical hole 7 is less than the height of the cemented quartz sand body 9; in the cylindrical hole 7, in the inner cavity of the annular cement cylinder 6 A compacted quartz sand body 4 is arranged between the perforated casing 5 and the sealing cap A2. The permeability and porosity of the compactedquartz sand body 4 are consistent with the formation-related parameters of the target well, and the gravel can be obtained and simulated according to the The production is carried out under the conditions of the sand control parameters (porosity, permeability) of the target well; thescreen tube 3 is arranged on the surface of the compactedquartz sand body 4, which is used to simulate the screen tube in the sand control structure of the actual oil well.

本发明的上述剪切模拟装置中，密封盖A2和密封盖B13的材质还可以是能够承受一定压力的玻璃钢；密封盖A2和密封盖B13还可以通过过盈配合与圆台状筒体密封连接；密封盖A2与密封管线接头a1还可以通过过盈配合密封连接；密封盖B13与密封管线接头b12还可以通过过盈配合密封连接；取样口8的个数可以根据需要进行调节，密封盖C11还可以通过过盈配合与圆台状筒体密封连接。圆环水泥柱体6还可以为圆环不锈钢柱体或圆环合金钢柱体；圆环水泥柱体6的内环直径和圆柱孔7的直径均可以根据实际目标井的射孔弹型号进行调节；圆柱孔7的直径可以大于圆环水泥柱体6的内环直径；胶结石英砂体9还可以为胶结露头砂体、胶结玻璃微珠或胶结陶粒等，其渗透率、孔隙度可与目标井的地层相关参数相近；压实石英砂体4的渗透率、孔隙度可与目标井的防砂参数相近；筛管3还可以为筛网或滤网。In the above-mentioned shear simulation device of the present invention, the material of the sealing cover A2 and the sealing cover B13 can also be glass fiber reinforced plastics capable of withstanding a certain pressure; the sealing cover A2 and the sealing cover B13 can also be sealed and connected with the truncated cylindrical body through interference fit; The sealing cover A2 and the sealing pipeline joint a1 can also be sealed and connected through an interference fit; the sealing cover B13 and the sealing pipeline joint b12 can also be sealed and connected through an interference fit; the number ofsampling ports 8 can be adjusted according to needs, and the sealing cover C11 can also It can be sealed and connected with the cone-shaped cylinder through interference fit. Theannular cement cylinder 6 can also be an annular stainless steel cylinder or an annular alloy steel cylinder; the diameter of the inner ring of theannular cement cylinder 6 and the diameter of thecylindrical hole 7 can be determined according to the type of perforating bullet of the actual target well. Adjustment; the diameter of thecylindrical hole 7 can be greater than the inner ring diameter of theannular cement cylinder 6; the cementedquartz sand body 9 can also be a cemented outcrop sand body, cemented glass beads or cemented ceramsite, etc., and its permeability and porosity can be adjusted. It is similar to the formation-related parameters of the target well; the permeability and porosity of the compactedquartz sand body 4 can be similar to the sand control parameters of the target well; thescreen pipe 3 can also be a screen or a filter.

使用本发明的剪切模拟装置时，将密封管线接头a1与室内驱替管线紧密连接，使驱替工作液进入圆台状筒体内。驱替工作液首先在圆柱筒体14内的压实石英砂体4内渗流，然后通过圆柱水泥环体6的内环后进入圆台筒体10内，在压实石英砂体4和胶结石英砂体9中沿径流方向内渗流；需要对驱替工作液的性能进行测量的时候，从取样口8获取驱替工作液进行性能测试；测试完毕后的驱替工作液可以从密封管线接头b12排出圆柱筒体15。When using the shear simulation device of the present invention, the sealed pipeline joint a1 is tightly connected with the indoor displacement pipeline, so that the displacement working fluid enters the cylindrical cylindrical body. The displacement working fluid first seeps in the compactedquartz sand body 4 in thecylindrical body 14, then passes through the inner ring of thecylindrical cement annulus 6 and then enters thecircular table body 10, and flows between the compactedquartz sand body 4 and the cemented quartz sand body. seepage in thebody 9 along the runoff direction; when it is necessary to measure the performance of the displacement working fluid, obtain the displacement working fluid from thesampling port 8 for performance testing; after the test, the displacement working fluid can be discharged from the sealed pipeline joint b12Cylindrical barrel 15.

Claims (10)

Translated fromChinese

1.一种近井地带剪切模拟装置，其特征在于：所述装置包括由圆台筒体与设置在所述圆台筒体小口径端的圆柱筒体组成的圆台状筒体；所述圆台状筒体上设有密封盖A和密封盖B；所述密封盖A位于所述圆柱筒体端，所述密封盖B位于所述圆台筒体端，所述密封盖A和密封盖B上分别设有密封管线接头a和密封管线接头b；所述圆柱筒体内设有与之过盈配合的圆环柱体；所述圆环柱体的下表面与所述密封盖B之间设有胶结砂体，所述胶结砂体内设有与所述圆环柱体的内腔相连通的圆柱孔；所述圆柱孔中、所述圆环柱体的内腔中和所述圆环柱体的上表面和所述密封盖A之间均设有压实砂体。1. A near-wellbore zone shear simulation device is characterized in that: the device comprises a frustum-shaped cylinder composed of a frustum-conical cylinder and a cylindrical cylinder arranged at the small-caliber end of the frustum-conical cylinder; the frustum-shaped cylinder The body is provided with a sealing cover A and a sealing cover B; the sealing cover A is located at the end of the cylinder body, the sealing cover B is located at the end of the cylindrical body, and the sealing cover A and the sealing cover B are respectively provided with There are a sealed pipeline joint a and a sealed pipeline joint b; a circular cylinder with an interference fit is provided in the cylindrical cylinder; cemented sand is provided between the lower surface of the circular cylinder and the sealing cover B body, the cemented sand body is provided with a cylindrical hole communicating with the inner cavity of the circular cylinder; in the cylindrical hole, in the inner cavity of the circular cylindrical body and on the upper A compacted sand body is arranged between the surface and the sealing cover A.2.根据权利要求1所述的模拟装置，其特征在于：所述密封盖A和密封盖B与所述圆台状筒体均为螺纹密封连接或过盈配合。2 . The simulation device according to claim 1 , characterized in that: the sealing cover A and the sealing cover B and the frustum-shaped cylindrical body are both thread-tightly connected or interference fit. 3 .3.根据权利要求1或2所述的模拟装置，其特征在于：所述密封盖A与所述密封管线接头a为螺纹密封连接或过盈配合。3. The simulation device according to claim 1 or 2, characterized in that: the sealing cover A and the sealing pipeline joint a are in a threaded sealing connection or an interference fit.4.根据权利要求1-3中任一所述的模拟装置，其特征在于：所述密封盖B与所述密封管线接头b为螺纹密封连接或过盈配合。4. The simulation device according to any one of claims 1-3, characterized in that: the sealing cover B and the sealing pipeline joint b are in a threaded sealing connection or an interference fit.5.根据权利要求1-4中任一所述的模拟装置，其特征在于：所述圆台状筒体上设有至少一个取样口；所述取样口上设有密封盖C。5. The simulation device according to any one of claims 1-4, characterized in that: at least one sampling port is provided on the truncated cylindrical body; a sealing cover C is provided on the sampling port.6.根据权利要求5所述的模拟装置，其特征在于：所述密封盖C与所述圆台状筒体为螺纹密封连接或过盈配合。6 . The simulation device according to claim 5 , characterized in that: the sealing cover C and the frustum-shaped cylinder are in a threaded sealing connection or an interference fit. 7 .7.根据权利要求1-6中任一所述的模拟装置，其特征在于：所述圆环柱体为圆环水泥柱体、圆环不锈钢柱体或圆环合金钢柱体；所述圆环柱体的下表面和所述圆柱筒体与所述圆台筒体的交界面重合。7. The simulation device according to any one of claims 1-6, characterized in that: the circular cylinder is a circular cement cylinder, a circular stainless steel cylinder or a circular alloy steel cylinder; The lower surface of the ring cylinder coincides with the interface between the cylinder body and the frustum cylinder body.8.根据权利要求1-7中任一所述的模拟装置，其特征在于：所述圆柱孔的直径大于或等于所述圆环柱体的内环直径；所述圆柱孔的高度小于所述胶结砂体的高度。8. The simulation device according to any one of claims 1-7, characterized in that: the diameter of the cylindrical hole is greater than or equal to the diameter of the inner ring of the circular cylinder; the height of the cylindrical hole is smaller than the The height of the cemented sand body.9.根据权利要求1-8中任一所述的模拟装置，其特征在于：所述压实砂体近所述密封盖A的表面上设有过滤装置；所述过滤装置为筛管、筛网或滤网。9. According to the simulation device described in any one of claims 1-8, it is characterized in that: the surface of the compacted sand body near the sealing cover A is provided with a filtering device; the filtering device is a screen tube, a screen mesh or strainer.10.根据权利要求1-9中任一所述的模拟装置，其特征在于：所述装置还包括设置在所述圆台筒体大口径端的另一个圆柱筒体。10. The simulation device according to any one of claims 1-9, characterized in that: the device further comprises another cylindrical body arranged at the large-diameter end of the circular frustum body.

Images