大粒径调剖颗粒封堵机理及深部运移性能评价  

Plugging mechanism of large size profile control particles and deep migration performance

作　　者：陈宇豪[1] 王克亮[1] 李根[1] 逯春晶[1] CHEN Yuhao;WANG Keliang;LI Gen;LU Chunjing(Key Laboratory of Enhanced Oil Recovery,Ministry of Education,Northeast Petroleum University,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学提高采收率教育部重点实验室,黑龙江大庆163318

出　　处：《岩性油气藏》2019年第1期159-164,共6页Lithologic Reservoirs

基　　金：黑龙江省普通本科高等学校青年创新人才基金项目"带活性基团的多孔材料的合成及气体分离性能的研究"(编号:UNPYSCT-2018041)资助

摘　　要：大粒径弹性调剖颗粒不同于常规调剖剂,通过合理运用可以有效改善地层深部的非均质性,然而目前受实验装置的限制,大粒径颗粒的室内注入实验研究十分有限。针对这一问题制作了裂缝模型及颗粒顶替装置,并设计了基于现场应用的一种粒径为1～5 mm的弹性调剖颗粒的封堵及深部运移性能评价实验。通过连接在顶替装置上的压力传感器记录压力数据,绘制了注入压力-时间曲线,总结了相关的数据分析方法;在数据处理方面提出颗粒变形通过压力这一参数用来评价颗粒的深部运移能力及其对目标裂缝的封堵能力,并通过改变颗粒体系中颗粒的含量来研究颗粒用量对于封堵和运移效果的影响。实验结果表明,调剖颗粒体系中颗粒的含量越高,封堵及深部运移作用的效果越好;1 mm粒径颗粒深部运移能力较强,3 mm粒径颗粒封堵能力较强,均适用于深部调剖,而5 mm粒径颗粒刚性封堵能力太强,不适用于深部调剖;在实际应用中应结合实施措施区块的地质条件以及措施实施目的进行颗粒选择。该项实验的设计及相应分析方法简单、有效,所需装置也较易获取,可为同类大粒径调剖颗粒性能研究的室内实验提供借鉴。Large size elastic profile control particle is different from conventional profile control agent. It can effectively improve the heterogeneity of deep formation by reasonable use. However,due to the limitation of experimental equipment,the laboratory injection experiment of large size particles is limited. In order to solve this problem,fracture model and particle displacement device were made,and a kind of plugging and deep migration performance evaluation experiment of elastic profile control particle with particle size of 1-5 mm was designed based on field application. Based on the pressure data that were recorded by pressure sensors connected to the displacement device,pressure-time curves were drawn and relevant data analysis methods were summarized. The particle deformation through pressure was proposed to evaluate the deep migration ability and plugging ability of particle,and the effects of particle content on plugging and migration were investigated by changing the content of particles in the profile agent system. The experiment results show that the higher the particle content in profile control particle system,the better the effect of plugging and deep migration. The migration ability of 1 mm particle is stronger and the plugging ability of 3 mm particle is stronger. Both 1 mm particle and 3 mm particle can be applied to the deep profile control. The rigid plugging ability of 5 mm particle diameter is so strong that it’s not suitable for the deep profile control. In field application,the particle selection should be carried out in combination with the geological condition of the target block and the purpose of the profile control. The design of the experiment and the corresponding analysis method are simple and effective,and the required devices are easier to obtain. This experimental method can be used for reference in laboratory experiments on the performance of similar large size profile control particles.

关 键 词：大粒径弹性颗粒 封堵能力 深部运移能力 颗粒含量 

分 类 号：TE357[石油与天然气工程—油气田开发工程]