高温非均质油藏聚合物凝胶调驱实验研究  

Experimental study on polymer gel profile control and flooding in high-temperature heterogeneous reservoirs

作　　者：廖建军 李华斌[1,2] 邓金玭 何刚 刘思思 张肖 Jianjun Liao;Huabin Li;Jinpin Deng;Gang He;Sisi Liu;Xiao Zhang(College of Energy Sources,Chengdu University of Technology,Chengdu,Sichuan 610059,China;State Key Laboratory of Oil and Gas Reservoir and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《日用化学工业（中英文）》2023年第4期373-381,共9页China Surfactant Detergent & Cosmetics

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(HBYT-KTY-2020-JS-50312)。

摘　　要：华北油田高温非均质油藏经过长期开采后,含水率高且非均质性进一步增强,而常规化学驱油措施控水增油效果较差。针对这一问题,通过室内体系筛选、物理模拟与理论分析相结合,研究了聚合物凝胶的抗高温性能、调剖效果以及控水增油能力。结果表明:筛选出的凝胶体系具有优异的抗高温性能与黏弹性模量,完全成胶后黏度最高可达4371.2 mPa·s,经30天高温老化后,黏度保留率为90.5%,弹性模量和黏性模量分别为10.4和1.3 Pa。同时该体系具有较强的封堵能力,在一定渗透率级差范围内,该体系的剖面改善能力与控水增油能力随着渗透率级差的增大而增大。当渗透率级差从2.13增加到8.16时,调剖后剖面改善率从58%增加到92.8%;当渗透率级差从2.06增加到8.08时,调驱后采收率增幅从10.2%增加到19.5%。After long-term exploitation of the high-temperature heterogeneous reservoirs in North China Oilfield,the water content becomes high and the heterogeneity is further enhanced,while conventional chemical flooding measures have poor effects in water control and enhancement of oil production.To solve this problem,the hightemperature resistance and the effects in profile control,water control and oil increase for polymer gels were studied through the combination of indoor screening,physical simulation,and theoretical analysis.The results showed that,the selected gel system had excellent high-temperature resistance and viscoelasticity,and the maximum viscosity was 4371.2 mPa·s after complete gelation.After 30 days of high temperature aging,the viscosity retention rate was 90.5%,and the elastic modulus and viscous modulus were 10.4 and 1.3 Pa,respectively.The system had strong plugging ability.In a certain range of permeability contrast,the abilities of profile improvement,water control and enhancement of oil production of the system were increased with the increase of permeability contrast.When the permeability contrast was increased from 2.13 to 8.16,the profile improvement rate after profile control was increased from 58%to 92.8%;when the permeability contrast was increased from 2.06 to 8.08,the recovery rate after profile control and flooding was increased from 10.2%to 19.5%.

关 键 词：高温非均质油藏 聚合物凝胶 交联机理 调驱能力 采收率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]