聚/表二元驱提高采收率研究  

Study on Enhanced Oil Recovery by Polymer and Surfactant Binary Flooding

作　　者：张继红[1] 王烁 ZHANG Ji-hong;WANG Shuo(School of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《当代化工》2023年第1期40-43,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金,非均质中低渗透油藏凝胶调驱井区筛选方法研究与应用(项目编号:51874096)。

摘　　要：聚/表二元驱在现阶段已凭借自身的优势被人们广泛应用,这是因为聚/表二元驱不仅拥有聚合物可以提高波及体积的特点,还拥有表面活性剂可以降低界面张力的特点,这两点相结合就大大提高了采出程度。由于在水驱后,仍然有大量的剩余油未被采出,为了验证聚/表二元驱的驱替效果,开展了静置时间、聚合物质量浓度、表面活性剂质量浓度、注入量、段塞尺寸大小一系列的对比实验。结果表明:二元驱溶液的驱油效果会明显高于单一聚合物溶液或单一表面活性剂溶液,主要是由于油水重新分布,黏度增大,波及体积也随之增大,剩余油从而被进一步驱替出来。聚合物质量浓度、注入量是影响采出程度的关键因素,而段塞尺寸在增加到某种程度时,采出程度趋于稳定。At present, polymer/surface binary flooding has been widely used because polymer/surface binary flooding not only has the characteristic that polymer can improve sweep volume, but also has the characteristic that surfactant can reduce interfacial tension. The combination of these two points greatly improves the recovery degree. Since there is still a large amount of remaining oil not recovered after water flooding, in order to verify the displacement effect of polymer/surface binary flooding, a series of comparative experiments on standing time, polymer mass concentration,surfactant mass concentration, injection volume and slug size were carried out. The experimental results showed that,the oil displacement effect of binary flooding solution was significantly higher than that of single polymer solution or single surfactant solution, mainly due to the redistribution of oil and water, the increase of viscosity and sweep volume, and the remaining oil was further displaced. Polymer mass concentration and injection volume were the key factors affecting the recovery degree, and the recovery degree tended to be stable when the slug size increased to a certain extent.

关 键 词：聚/表二元驱 注入量 段塞尺寸 采出程度 

分 类 号：TE327[石油与天然气工程—油气田开发工程]