黏度可控凝胶体系注入参数优化  

Injection Parameter Optimization of A Viscosity-Controlled Gel System

作　　者：吕杭 刘向斌[1] 王庆国[1] 周泉[1] 王力[1] LYU Hang;LIU Xiangbin;WANG Qingguo;ZHOU Quan;WANG Li(Production Engineering Research Institute,Daqing Oilfield Company Limited,PetroChina,Daqing,Heilongjiang 163453,China)

机构地区：[1]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《新疆石油地质》2018年第6期708-712,共5页Xinjiang Petroleum Geology

摘　　要：大庆油田聚合物驱后优势渗流通道发育,窜流严重,有效开采难度大。为保持油田持续有效开发,确立了调、堵、驱结合的技术研究。针对调堵需求,研制出一种黏度可控凝胶体系,该体系初始黏度小于20 m Pa·s,10～40 d黏度小于300 mPa·s,成胶黏度2 500 m Pa·s以上。根据聚合物驱后的取心井资料设计物理模型,利用正交试验设计法确定的最佳注入量为0.10 PV,注入浓度为1 000 mg/L,注入速度为0.6 mL/min.应用表明,高渗透层分流率由聚合物驱后后续水驱的66.9%降为0.7%,中渗透层分流率由33.0%升至85.0%,低渗透层分流率由0.1%升至14.3%,该体系对中、低渗透层污染小,对高渗透层有效封堵,可以满足现场需求。After the polymer flooding, Daqing oilfield is characterized by developed preferential flow path, serious channeling and difficulties in efficient production. In order to maintain the sustainable and effective development of the oilfield, researches have been carried out for the technologies of profile modification, water plugging and flooding. Regarding the requirement of profile modification and water plugging, a viscosity-controlled gel system is developed. The initial viscosity of the system is less than 20 mPa·s, during 10-40 days, the system viscosity is less than 300 mPa·s and the gel viscosity is above 2 500 mPa·s. The data from cored wells after polymer flooding are used to design a physical model. The optimal injection volume determined by orthogonal experimental design is 0.10 PV, the injection concentration is 1 000 mg/L and the injection rate is 0.6 mL/min. The actual application shows that after modification the shunt rate of high-permeable layer reduces from 66.9% to 0.7%, that of medium-permeable layer increases from 33.0% to 85.0%, that of low-permeable layer improves from 0.1% to 14.3%. The system has low pollution to medium and low permeable layers and can effectively plug the high-permeable layer, which can meet the demands of field operation.

关 键 词：大庆油田 聚合物驱 黏度可控 注入参数 分流率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]