低张力体系在低渗透油藏中降压增注实验研究  

Experimental Study of Pressure-decrease and Injection-increase Using Low Surface-tension System in Low Permeable Oil Reservoir

作　　者：文光华[1] 赖南君[1] 董军[1] 王捷[1] 肖霞[1] 宋晓慧[1] 

机构地区：[1]西南石油大学化学化工学院,成都610500

出　　处：《精细石油化工进展》2012年第7期18-21,共4页Advances in Fine Petrochemicals

摘　　要：简要介绍了表面活性剂降压增注原理,由阴离子表面活性剂SDBS和两性表面活性剂DJ-M以质量比4∶1复配而成的低张力体系,能将油水界面张力在较宽温度和较大矿化度范围内降低至10-3 mN/m数量级。考察了复配低张力体系降压增注和驱油性能,结果表明,复配低张力体系能使注水压力平均降低37.5%,增加注水量,采油率提高8个百分点。Principle for surfactant to decrease pressure and increase injection was briefly introduced. The tension on the interface of oil - water decreased to the magnitude of 10-3 mN/m in wide temperature and salinity range using the low surface -tension system comprising anionic surfactant SDBS and amphoteric DJ - M in the mass ratio of 4 ： 1. The performamces such as pressure - decrease, injection - increase, and oil flooding were examined. The result showed that the water - injection pressure decreasedby 37.5 %. the water - injection increased,and the oil -production rate increased by 8%.

关 键 词：低张力体系 表面活性剂 低渗透油藏 注水压力 采收率 

分 类 号：TE348[石油与天然气工程—油气田开发工程]