底水气藏开发对策研究现状  

Development countermeasures for bottom-water gas reservoirs

作　　者：李娟 汪周华[2] 欧家强 李钊名 杨洋 吴金川 李松岑 LI Juan;WANG Zhouhua;OU Jiaqiang;LI Zhaoming;YANG Yang;WU Jinchuan;LI Songcen(Northern Central Sichuan Gas Production Management Department,PetroChina Southwest Oil&Gasfield Com-pany,Suining,Sichuan 629000,China;National Key Laboratory of Oil and Gas Reservoir Geology and Exploita-tion,Southwest Petroleum University,Chengdu,Sichuan 610500,China)

机构地区：[1]中国石油西南油气田公司川中北部采气管理处,四川遂宁629000 [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：《天然气勘探与开发》2024年第3期46-56,共11页Natural Gas Exploration and Development

基　　金：国家科技重大专项(编号:2016ZX05052)。

摘　　要：底水气藏在我国天然气勘探开发中占有重要地位,但底水气藏之间构造及储层物性差异大,气水关系复杂,水侵方式难以预测,导致常规开发对策适应性差,严重影响底水气藏开发效果。为此,广泛调研国内外底水气藏开发实例,对比不同底水气藏的地质构造特征差异,分析水侵方式与开发效果,总结不同储渗类型的底水气藏在不同开发阶段适宜的开发对策。研究结果表明:①碳酸盐岩底水气藏常见裂缝发育,储层以裂缝-孔隙型与缝洞型为主,碎屑岩底水气藏常见局部微裂缝发育,储层以孔隙型居多。②不同储渗类型的底水气藏在水侵方式上具有较大的差异性,针对目标气藏应采取适合于该气藏特征的开发对策。③底水气藏在不同的开发阶段都有特定治水目标,早期阶段通过优化开发技术政策参数与优选完井方式延长无水采气期,中期阶段通过单井排水、堵水以及阻水等措施缓解局部气井出水,晚期阶段以恢复动用地质储量与水淹井复产为目标选择开发对策。该研究成果为底水气藏的开发提供借鉴与参考。Bottom-water gas reservoirs play an important role in China's natural gas exploration and development.However,these reservoirs differ greatly in tectonic and physical properties,with complex gas-water relationships,as well as unpredictable water invasion patterns,leading to the limitations of conventional development countermeasures,which impede the development of bottom-water gas reservoirs.In this paper,development practices of bottom-water gas reservoirs at home and abroad were investigated.These reservoirs were compared for geological and tectonic features,and analyzed for water invasion patterns and development effects.Finally,the development countermeasures were summarized for bottom-water gas reservoirs with different reservoir and infiltration types in different development stages.The results are shown as follows:(i)Carbonate bottom-water gas reservoirs commonly contain developed fractures,and they are mainly fractured-porous and fractured-vuggy reservoirs,while clastic bottom-water gas reservoirs are commonly observed with localized microfractures,and they are mostly porous reservoirs.(ii)Bottom-water gas reservoirs with different reservoir and filtration types are distinct in water invasion patterns,so the development countermeasures should be customized for target gas reservoir depending on its characteristics.(iii)Bottom-water gas reservoirs in different development stages correspond to specific water control objectives:in the early stage,the parameters of development countermeasures are optimized and the best completion method is selected to prolong the water-free production period;in the middle stage,single-well water drainage,plugging,and blocking are implemented to mitigate the water production of gas wells;and in the late stage,the development countermeasures are determined with the objectives of restoring the producing geological reserves and resuming the recovery of water-flooded wells.The research results provide references for the development of bottom-water gas reservoirs.

关 键 词：底水气藏 储渗特征 开发效果 水侵方式 开发对策 治水措施 

分 类 号：TE37[石油与天然气工程—油气田开发工程]