碳酸盐岩油藏聚合物凝胶调堵体系的性能评价及应用  

Performance evaluation and application of polymer gel plugging system in carbonate reservoir

作　　者：陈利新[1,2] 姜振学 李彬儒[1] 王霞 孙新 郭继香 CHEN Lixin;JIANG Zhenxue;LI Binru;WANG Xia;SUN Xin;GUO Jixiang(Unconventional Oil and Gas Institute in China University of Petroleum(Beijing),Beijing 102249,China;Donghe Oil and Gas Production Management Zone of Tarim Oilfield Company,PetroChina,Korla 841000,China)

机构地区：[1]中国石油大学(北京)非常规油气科学技术研究院,北京102249 [2]中国石油塔里木油田分公司东河采油气管理区,新疆库尔勒841000

出　　处：《中国石油大学学报（自然科学版）》2023年第2期115-122,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2017ZX05008-004-001);国家自然科学基金项目(52174047);中国科学院战略性先导科技专项(XDA14010302)。

摘　　要：针对碳酸盐岩油藏经过长期注水开发后波及效率降低、水窜严重、提高采收率效果差的难题,提出利用流道调整配合注水开发的方法,研发耐温耐盐聚合物凝胶调堵体系,考察其在高温高盐油藏条件下的应用性能。根据油藏条件及剩余油情况分析耐温耐盐聚合物整体调堵可行性。结果表明:体系耐温可达140℃,耐盐2.36×10^(5) mg/L,岩心封堵率为95.21%;采用“两头封堵”(即注水井与采油井同步作业)措施后,含水率由100%下降至50%;施工前、后相同生产时间累积增油800 t,平均日增油5.5 t。In view of the problems of low sweep efficiency,serious water channeling,and poor recovery during enhanced oil recovery schemes in carbonate reservoirs after long-term water injection programs,a method of flow channeling coupled with water injection scheme was proposed.A high-temperature and high-salt resistant polymer gel system was developed to plug high permeable zones,whose performance under these extreme conditions has been investigated.And the feasibility of the overall plugging of the temperature and salt resistant polymer was analyzed according to the reservoir conditions and the remaining oil.The results show that the temperature resistance of the system can reach 140℃,the salt resistance is 2.36×10^(5) mg/L,and the core plugging rate is 95.21%.After adopting the measure of"two ends plugging"(i.e.,simultaneous injection and production),the water cut is reduced by 50%resulting in an oil increase of 800 t with an average daily oil production increase of 5.5 t.

关 键 词：碳酸盐岩油藏 注水开发 流道调整 聚合物凝胶 

分 类 号：TE344[石油与天然气工程—油气田开发工程]