萨中油田四种驱油体系对油藏适应性对比分析  

Contrastive analysis on reservoir adaptability of four kinds of oil-displacement systems of Sazhong oilfield

作　　者：刘进祥[1] 孙学法[1] 卢祥国[1] 张云宝[1,2] 肖龙 谢坤 王婷婷[1] 赵劲毅[4] Liu Jinxiang;Sun Xuefa;Lu Xiangguo;Zhang Yunbao;Xiao Long;Xie Kun;Wang Tingting;Zhao Jinyi(Key Laboratory of Enhacecd Oil and Gas Recovery of Educational Ministray,Daqing,Heilongjiang 163318,China;Bohai Oil Research Institute,Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300452,China;No.1 Oil Production Plant of Daqing Oilfield,CNPC,Daqing,Heilongjiang 163001,China;No.2 Oil Production Plant of Daqing Oilfield,CNPC,Daqing,Heilongjiang 163414,China)

机构地区：[1]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 [2]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452 [3]中国石油大庆油田第一采油厂,黑龙江大庆163001 [4]中国石油大庆油田采油二厂,黑龙江大庆163414

出　　处：《油气藏评价与开发》2018年第5期14-22,共9页Petroleum Reservoir Evaluation and Development

基　　金：国家科学自然基金"抗盐型聚合物油藏适应性及其改进方法基础研究"(51574086);国家科技重大专项"渤海双高油田多级窜逸堵调驱一体化技术研究及示范"(2016ZX05058003-010);黑龙江省东北石油大学研究生创新科研重点项目"LD10-1油田化学驱注入工艺优化研究"(YJSCX2017-007NEPU)

摘　　要：为保证化学驱在大庆油田顺利实施,开展了相同条件下聚合物溶液、聚表二元体系、强碱三元复合体系和弱碱三元复合体系的黏度、分子聚集体尺寸(Dh)、分子聚集体形态和岩心渗透率极限及影响因素研究。结果表明,相同条件下体系的黏度和Dh大小顺序为聚表二元>聚合物溶液>弱碱三元>强碱三元;而岩心渗透率极限大小顺序为聚表二元>强碱三元>聚合物溶液>弱碱三元,这是因为Dh越大,驱油体系能通过的岩心渗透率越大,渗透率极限越大。但强碱三元与岩心中矿物反应,堵塞岩石孔道,导致其渗透率极限增大。四种驱油体系黏度和渗透率极限均随剪切强度增加而下降,但剪切作用使聚合物分子发生定向排列,从而使驱油体系中Dh受到剪切后变化规律不明显。For the success of the implement of chemical flooding in Daqing oilfield,the viscosity,molecule coil size and molecular configuration of polymer solution,polymer/surfactant compound system,strong base alkali-surfactant-polymer(ASP)system and weak base ASP system,and the permeability range of the shale core and its influencing factors were studied under the same condition.The results showed that under the same condition,the viscosity and molecule coil size were in a descending order as:polymer/surfactant dual system,polymer solution,weak base ASP system,and strong base ASP system.While for the core permeability limit,the order was:polymer/surfactant dual system,strong base ASP system,polymer solution,and weak base ASP system.The reason was the bigger the molecule coil size was,the higher the core permeability that the oil-displacement systems could get through and the greater the permeability limit would be.But the strong base ASP system could react with the minerals in the cores,which resulted in the blocking of the core pores and the increase of permeability limit.The viscosity and permeability range of four kinds of oil-displacement system decreased with the increase of the shear strength,but the shearing action led to the oriented arrangement of the polymer molecules,the change law of polymer molecules in the oil-displacement system after shearing action was unobvious.

关 键 词：驱油体系 油藏适应性 分子聚集体尺寸 分子聚集体形态 渗透率极限 

分 类 号：TE357[石油与天然气工程—油气田开发工程]