驱油剂与储层岩石作用及其对渗流特性影响  

ACTIONS BETWEEN THE OIL DISPLACING AGENTS AND RESERVOIR ROCKS AND INFLUENCES ON THE FLOW CHARACTERISTICS

作　　者：宋国芬[1] 王春丽[2] 卢祥国[3] SONG Guofen WANG Chunli LU Xiangguo(Daqing Oilfield Engineering Co Ltd. ofDaqing Oilfield Co Ltd., Daqing 163712, China No. 5 Oil Production Plant of Daqing Oilfield Co Ltd., Daqing 163218, China MOE Key Laboratory of EOR, Northeast Petroleum University, Daqing 163318, China)

机构地区：[1]大庆油田有限责任公司大庆油田工程有限公司,黑龙江大庆163712 [2]大庆油田有限责任公司第五采油厂,黑龙江大庆163218 [3]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2017年第2期95-101,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金面上项目"抗盐型聚合物油藏适应性及其改进方法基础研究"(51574086);大庆油田重点科技攻关课题"杏十二区弱碱三元复合驱采出液乳化对受效影响研究"(DQYT-0505003-2015-JS-370)经费资助

摘　　要：利用化学分析方法、现代油藏工程理论、仪器检测分析和物理模拟方法,开展了碱液浸泡对天然岩心孔隙结构的影响以及碱与表面活性剂对渗流特性影响研究,并进行了机理分析和探讨。结果表明:强碱可与目标油藏岩石中矿物成分发生剧烈溶蚀作用,造成颗粒运移和渗流阻力增加;与强碱相比,弱碱与岩石矿物反应程度较低,油藏适应性较好;与聚合物溶液相比,"碱/表面活性剂/聚合物"三元复合体系中聚合物分子线团尺寸较小,聚合物在多孔介质内滞留量减小,渗流阻力降低。非离子表面活性剂在聚合物分子链上吸附是造成聚合物分子线团尺寸增加、聚合物滞留量增大和渗流阻力增加的主要原因。With the help of the following methods ： chemical analysis, modern reservoir engineering theory, equipment test-analysis and physical simulation, the influences of the alkalic solution invasion and steep on the natural core pore structures were studied, so did the effects of the alkali and surfactants on the seepage characteristics, and furthermore the mechanism was analyzed and explored. The results show that the strong alkali corrosion can occur severely on the mineral components in the reservoir rocks, this case results in the increased particle migration and seepage resistances; Compared with the strong alkali, the weak alkali corrosion is not severe on the mineral compo- nents in the rocks, so the adaptability with the oil reservoirs is much better; Compared with the polymer solution, the sizes of the polymer molecular mass of the ASP complex system are pretty smaller, the retention of the polymer in the porous media decreases and the seepage resistance also drops. The adsorption of the non-ionic surfactants on the polymer chains is the main reason of the increases of the molecular mass size, polymer retention and flow resistance.

关 键 词：碱 表面活性剂 地层溶蚀 渗流特性 影响因素 物理模拟 

分 类 号：TE122.1[石油与天然气工程—油气勘探]