低渗透油藏清洁屏蔽暂堵体系评价  

Evaluation of Clean Shielding Temporary Plugging System in Low-permeability Reservoir

作　　者：寸锡宏 赵霞[1] 王超 任晓强 张勇[1] 沈飞[1] 李年银[2] CUN Xihong;ZHAO Xia;WANG Chao;REN Xiaoqiang;ZHANG Yong;SHEN Fei;LI Nianyin(Marine Oil Production Plant of Shengli Oilfield Company,Sinopec,Dongying,Shandong 257237,P R of China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,P R of China)

机构地区：[1]中国石化胜利油田分公司海洋采油厂,山东东营257237 [2]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500

出　　处：《油田化学》2022年第4期630-635,共6页Oilfield Chemistry

基　　金：国家自然科学基金面上项目“多孔介质中酸液的流动反应行为研究”(项目编号51574197);国家自然科学基金石油化工联合基金项目“复杂碳酸盐岩储层转向酸与固体转向剂协同转向机理研究”(项目编号U1762107);中国石油-西南石油大学创新联合体项目“深层超高温碳酸盐岩气藏酸处理增产改造关键技术研究”(项目编号2020CX010501)。

摘　　要：为避免洗井时入井流体大量漏失进入储层,造成油气层损害,以天然树脂与多元醇为主要原料,制备了暂堵剂颗粒,将其与十二烷基苯磺酸钠、分散互溶剂等添加剂复配制得清洁屏蔽暂堵剂体系。研究了暂堵剂颗粒的溶解性、配伍性、最优加量和暂堵剂体系对岩心的封堵解堵性能。结果表明,该暂堵剂能在油类溶剂中完全溶解,与地层水和水源水的配伍性良好,堵剂最佳加量为50%。暂堵剂体系对岩心的封堵率可达96.24%、解堵率为93.59%,且耐冲刷能力强。该暂堵剂体系在现场油井的应用效果较好,日均产油量从2.4 m^(3)增至3.1 m^(3),含水率有一定程度降低,可实现保护油气储层的目的。In order to avoid a large amount of fluid leaking into the reservoir during well cleaning and causing damage to oil and gas reservoir,the clean shielding temporary plugging agent(CSTPA)was prepared using natural resin and polyol as the main raw materials. Then a CSTPA system was prepared by mixing CSTPA,sodium dodecyl benzene sulfonate,dispersing mutual solvent and other additives. The solubility,compatibility,optimum dosage and parallel plugging and de-plugging performance of the system were studied. The results showed that the temporary plugging agent could be completely dissolved in oil solvent. It had good compatibility with formation water and water source water. The optimum dosage of plugging agent was 50%. The plugging rate to core could reach 96.24% and the plugging rate was 93.59%. Furthermore,the scouring resistance was strong. The field effect of the clean shielding temporary plugging system was good. The daily average oil production was increased from 2.4 m^(3) to 3.6 m^(3),the water cut,meanwhile,was reduced to a certain extent,which indicated that the system could achieve the purpose of oil and gas reservoir protection.

关 键 词：低渗透油藏 储层保护 屏蔽暂堵 油溶性堵剂 性能评价 

分 类 号：TE358[石油与天然气工程—油气田开发工程] TE254