G区块梯次降浓段塞组合聚合物驱方案优化研究  

Optimization of Polymer Flooding Scheme With Step-decreasing Concentration of Slug Combination in Block G

作　　者：张承丽[1] 阮国良 孙铎 刘灏亮 ZHANG Cheng-li;RUAN Guo-liang;SUN Duo;LIU Hao-liang(Department of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;PetroChina Yumen Oilfield Branch Company,Jiuquan Gansu 735019,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]中国石油玉门油田分公司,甘肃酒泉735019

出　　处：《当代化工》2022年第1期160-163,共4页Contemporary Chemical Industry

基　　金：黑龙江省自然科学基金项目(项目编号:LH2020E013);东北石油大学优秀科研人才培育基金项目(项目编号LJYCHB201901);黑龙江省博士后科研启动金资助项目(项目编号LBH-Q20075)。

摘　　要：针对G区块目前含水率较高、采收率低、剩余油储量大、水驱开发难度大的问题,下一步将采用聚合物驱挖潜剩余油。考虑梯次降浓段塞组合聚驱的方式,使用700万相对分子质量抗盐聚合物和2500万相对分子质量聚合物进行交替注入,设计3种不同段塞组合聚驱方案,预测并对比不同方案聚驱效果。根据数值模拟结果,优选出方案2为合理聚驱方案,与常规水驱相比,提高采收率8.41%,累积增油3.794×10^(5)t,经济效益最好。研究结果为G区块聚合物驱方案的制定提供技术支持和科学保障,更好地指导矿场聚合物驱试验的实施。In view of problems of development in Block G, including high water cut, low recovery, large remaining oil and difficulties of water flooding, polymer flooding will be used to recover remaining oil in the next. In this paper, the method of step-decreasing concentration of slug combination for polymer flooding was studied. Polymers of 25 million and 7 million molecular weight salt-resistant polymers were injected alternately, and three schemes of different slug-combination of polymer flooding were designed, the effects of polymer flooding of different schemes were predicted and compared by numerical simulation. According to the result of numerical simulation, Scheme 2 was selected to be the reasonable one. Compared with water flooding, the oil recovery was enhanced by 8.41%, and the cumulative oil production was increased by 3.794×10^(5)t, which got the best economic benefit. The research results of this paper provide technical support and scientific guarantee for the polymer flooding scheme in Block G, and guide the field test better.

关 键 词：剩余储量 聚合物驱 数值模拟 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]