双重介质低渗透储层压裂技术研究与应用

Research and application of fracturing technology for dual-media reservoirs with low-permeability

吴小平 陶良军 张雪莲 李伟 张仁俊 余芳

WU Xiaoping TAO Liangjun ZHANG Xuelian LI Wei ZHANG Renjun YU Fang

河南油田公司石油工程技术研究院，河南南阳　473132 渤海石油职业学院，河北任丘　062552 渤海钻探井下作业公司，河北任丘　062552

Petroleum Engineering Technology Research Institute, He’nan Oilfield Company, SINOPEC, Nanyang 473132, China Bohai Petroleum Vocational College, Renqiu 062552, China Downhole Servives Co. of CNPC Bohai Drilling Engineeing Company Limited, Renqiu 062552, China

针对下二门油田梨树凹区块低孔、低渗储层，存在层间收缩缝、砾间缝等多种天然裂缝，具有明显的双重介质储层特征，结合勘探开发过程中的压裂改造实践，对压裂工艺及施工参数进行了优化研究配套,较好地解决了储层压裂易早期砂堵的问题。5井次压后获得高产油流或工业油流，为梨树凹区块储量升级提供了重要依据。

Lishuwa area in Xiaermen oilfield is a reservoir with low porosity and permeability, exists different kind of natural fractures as intrabed shrinkage joint and breaks in gravel, indicating apparent characteristic of dual-media reservoir. Excessive loss of fracturing fluid and early sand block resulted from natural fractures restricts the development of the oil field. The problem as early sand block of the reservoir during fracturing is solved by the technologies including multi-small test technology, multi-stage loss reducing technology with powder earthenware, multi-stage sand addition with varying volume，fractional bridging sanding technology with proppant agent slug, spiral sand addition and optimization of fracturing parameters. Large oil stream or commercial oil flow was obtained for 5 wells/times after fracturing. It provides significant foundation of reserve upgrade for Lishuwa reservoir.