大庆石油地质与开发2025，Vol.44Issue(2)：19-27,9.DOI:10.19597/J.ISSN.1000-3754.202309055
四川盆地营山地区须家河组二段致密砂岩气藏特征及有利目标区
Characteristics of tight sandstone gas reservoirs and favorable targets in Xu2 Member of Xujiahe Formation in Yingshan area of Sichuan Basin
摘要
Abstract
In order to understand gas-water relationship and enrichment laws of tight gas reservoirs in Xu2 Member of Xujiahe Formation of Sichuan Basin,response characteristics of logging curves are analyzed based on high-reso-lution sequence stratigraphy theory integrating experimental analysis,logging and seismic data to identify different orders of sequence boundaries and flooding surfaces types.The results show that X2 Member includes 1 long-term base-level cycle and 6 mid-term base-level cycles.MSC1-MSC4 mid-term cycles is a long-term rise cycle with re-gressive lithologic assemblages.MSC5-MSC6 mid-term cycle is a long-term fall cycle with transgressive lithologic assemblages.Lithologic assemblages of rise cycle have high compaction resistance and good properties.Structural adjustments causes thorough gas-water differentiation,forming structural gas reservoir.Mechanical compaction is strong in fall cycle,resulting in severe destruction of primary intergranular porosity of reservoir.The period of large amount of oil and gas charging into reservoir couples with reservoir tightening evolution,with characteristics of si-multaneous tightening and accumulation,and with overall gas-bearing and large-scale enrichment in fall cycle,making it favorable target layer for future reserves upgrading of Xu2 Member in Yingshan structure.The research provides evidence for selection of favorable tight reservoirs developed areas in Yingshan area,as well as for further exploration for favorable target areas of tight gas reservoirs.关键词
致密砂岩/富集模式/须二段/营山构造/四川盆地/川东北地区Key words
tight sandstone/enrichment pattern/Xu2 Member/Yingshan structure/Sichuan Basin/northeastern Sichuan area分类
石油、天然气工程引用本文复制引用
王有智..四川盆地营山地区须家河组二段致密砂岩气藏特征及有利目标区[J].大庆石油地质与开发,2025,44(2):19-27,9.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目"四川盆地大庆探区侏罗系陆相页岩油富集机理与关键评价技术研究"(2022DJ1809). （2022DJ1809）
