大庆石油地质与开发2025，Vol.44Issue(2)：28-37,10.DOI:10.19597/J.ISSN.1000-3754.202309039
四川盆地中—北部中二叠统构造-沉积分异作用与油气勘探方向
Middle Permian tectono-depositional differentiation and oil and gas exploration direction in northern-central Sichuan Basin
摘要
Abstract
Sichuan Basin has abundant oil and gas resources,and Permian strata are important exploration target se-ries.In order to clarify the initial time of Middle Permian tectono-depositional differentiation in northern-central Si-chuan Basin and to guide natural gas exploration,new and old drilled wells and seismic section data are integrated to analyze tectono-depositional response characteristics of Middle Permian Qixia-Maokou formations in northern-central Sichuan Basin,confirming that Permian tectono-depositional differentiation in Sichuan Basin started from middle-late Qixia Formation,and regional extension led to tectono-depositional differentiation within basin.The re-sults shows that sedimentary environment of Qixia Formation in northern-central Sichuan Basin is dominated by car-bonate gentle slope sedimentation,with small scale of beach bodies developed due to weak tectono-depositional dif-ferentiation,while tectono-depositional differentiation intensified in middle-late Maokou Formation,resulting in al-ternations of uplifts and sags in northern-central Sichuan Basin,with large-scale development of multi-stages plat-form margin reef beaches.The differentiation not only resulted in superimposed development of multi-stages plat-form margin zone reservoirs in Qixia-Maokou formations,but also led to the formation of several sets of source rocks in rifted deep water area,showing good source-reservoir-seal configuration relationship.Deep and large faults formed in the same period can effectively connect source rocks and improve reservoir property,providing favorable conditions for gas accumulation.The research greatly expands exploration domains of Middle Permian northern-cen-tral Sichuan Basin,and points out the direction for exploration of Middle Permian Qixia-Maokou formations.关键词
四川盆地中―北部/中二叠统/构造-沉积分异作用/油气勘探方向Key words
northern-central Sichuan Basin/Middle Permian/tectono-depositional differentiation/oil and gas exploration direction分类
石油、天然气工程引用本文复制引用
谭万仓,王显东,李强,鲁鹏,王营,赵亮,牛鹏飞..四川盆地中—北部中二叠统构造-沉积分异作用与油气勘探方向[J].大庆石油地质与开发,2025,44(2):28-37,10.基金项目
国家自然科学基金项目"白云岩-膏盐岩共生体系中白云岩储层埋藏溶蚀增孔效应与实验研究"(42202191). （42202191）
