大庆石油地质与开发2025，Vol.44Issue(2)：50-57,8.DOI:10.19597/J.ISSN.1000-3754.202402014
低渗透砂岩储层解水锁剂优选及效果评价
Optimization and effect evaluation of water lock release agent for low permeability sandstone reservoir:A case study of X gas field in Ordos Basin
摘要
Abstract
In order to solve the problem that low permeability sandstone gas reservoirs,especially gas reservoirs with edge and bottom water,are prone to serious water lock in the process of exploration and development,several methods including surface tension test,contact angle test,gas drive fluid core displacement experiment and nucle-ar magnetic resonance technique are used to study the optimization of water lock release agent and the evaluation of water lock release effect.The results show that,in condition of about 3 times salinity of simulated formation water and in the core with permeability≥2.0×10-3 µm2,the optimized system of 0.3%(mass fraction)Pei 2 water lock re-lease agent+simulated formation water still shows good effect on reducing water lock damage.Nuclear magnetic res-onance T2 spectrum test experiment and nuclear magnetic imaging technique are used to compare the displacement effect of single simulated formation water and the addition of water lock release agent.The results show that the cor-responding peak area after displacement is significantly reduced compared with the peak area without water lock re-lease agent,fully confirming the good effect of optimized water lock release agent system in reducing water lock damage.The research provides effective method for optimizing and evaluating water lock release agent,which is helpful to maximize water lock release effect of optimized water lock release agent system.关键词
低渗透/边底水气藏/水锁/解水锁剂/效果评价/核磁共振/鄂尔多斯盆地Key words
low permeability/gas reservoirs with edge and bottom water/water lock/water lock release agent/effect evaluation/nuclear magnetic resonance/Ordos Basin分类
石油、天然气工程引用本文复制引用
蒲万芬,侯帅,沈超,杜代军,刘锐,郭健,徐东晓..低渗透砂岩储层解水锁剂优选及效果评价[J].大庆石油地质与开发,2025,44(2):50-57,8.基金项目
国家自然科学基金项目"黏度可控的原位增黏体系构建及高效驱油机理研究"(U19B2010) （U19B2010）
国家自然科学基金项目"基于水/原油与水/岩石界面耦合的两亲二维纳米碳驱油研究"(42172347). （42172347）
