三类油层弱碱三元复合体系动态驱油实验研究  

Experimental Study on the Displacement of Oil by ASP Weak Alkali System in Class Ⅲ Reservoirs

作　　者：闫文华[1] 姚振杰[1] 石晓博[1] 吴安东[2] 潘文辉[3] 

机构地区：[1]提高采收率教育部重点实验室东北石油大学,黑龙江大庆163318 [2]中油辽河油田公司,辽宁辽中110206 [3]中油河南油田公司,河南南阳473132

出　　处：《特种油气藏》2013年第2期102-104,114,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"薄差油层动用条件及层系井网优化研究"(2011ZX05010-002-05)

摘　　要：为提高萨尔图油田三类油层实施弱碱三元复合体系驱油效果,开展室内岩心驱替实验,对比分析了不同注入时机、不同聚合物浓度、不同表面活性剂浓度及不同注入方式的驱油效果。结果表明:对于三类油层,水驱转注三元复合体系的时间越早,采收率越高;三类油层实施弱碱三元复合体系驱油时,主段塞聚合物浓度越高,表面活性剂浓度越高,采出程度越高;注入聚合物前置段塞的体积越大,聚合物后续保护段塞体积越大,采出程度越高;相对分子质量为620×104聚合物的三元复合体系中聚合物浓度大于2 750 mg/L时,在水驱基础上化学驱采出程度大于11%;相对分子质量为700×104(抗盐)和相对分子质量为1 400×104聚合物的三元复合体系在水驱基础上化学驱采出程度均大于20%。In order to improve the efficiency of the displacement of oil by ASP weak alkali in class 3 reservoirs of Saertu Oilfield,experiments of the displacement of oil with cores are conducted in lab and it is analyzed that different injection times,different polymer injection concentrations,different surfactant concentrations and different injection modes influence displacement effectiveness.The results show that for class 3 reservoirs,the earlier the conversion of water flooding to ASP,the higher the recovery factor;for the implementation of ASP weak alkali in class 3 reservoirs,the higher the polymer concentration in main slug and the higher the surfactant concentration,the higher the recovery percentage;when polymer concentration of ASP with molecular mass of 620×10 4 is greater than 2 750 mg/L,recovery percentage with chemical flooding increases by 11% compared with water flooding;and when molecular mass is 700×10 4 and 1 400×10 4,recovery percentage with chemical flooding increases by 20% compared with water flooding.

关 键 词：三类油层 弱碱 三元复合体系 驱油效果 采出程度 萨尔图油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]