天然气工业2026，Vol.46Issue(7)：60-76,17.DOI:10.3787/j.issn.1000-0976.2026.07.006
四川盆地筇竹寺组页岩气"槽-隆"时空耦合富集规律
Aulacogen-uplift spatiotemporal coupling enrichment patterns of shale gas in the Qiongzhusi Formation,Sichuan Basin
摘要
Abstract
The structural superimposition of Deyang-Anyue aulacogen and Leshan-Longnvsi paleo-uplift has a macro-control effect on the enrichment of shale gas in the Qiongzhusi Formation.Existing understanding is mainly static,macroscopic and qualitative,making it difficult to meet the demand of dynamic,precise and predictable evaluation of sweep spots in the process of expansion.To determine the factors controlling the shale gas accumulation in this area,focusing on the aulacogen-uplift superimposed area in the Sichuan Basin,this paper conducts whole-process dynamic coupling analysis of tectonism,sedimentation and hydrocarbon accumulation by means of fine seismic interpretation,paleogeomorphic restoration,structural reconstruction during hydrocarbon accumulation period,and geochemical test.Based on this,the aulacogen-uplift spatiotemporal coupling enrichment pattern of shale gas in the Qiongzhusi Formation is clarified.The following results are obtained.First,during the deposition of the Qiongzhusi Formation,episodic tectonic activity controlled the micro-paleogeomorphic differentiation of the aulacogen,and syn-depositional structures and micro-paleogeomorphology jointly governed the heterogeneous distribution of high-quality shale reservoirs.Organic-rich shale is developed in low-lying areas,exhibiting favorable reservoir properties and serving as the material basis for large-scale reservoir formation.Second,during the critical periods of hydrocarbon accumulation,the structural high of the paleo-uplift migrated continuously southward,dynamically controlling thermal maturity,pore evolution and gas content distribution,and ultimately governing the planar differential enrichment of shale gas.Third,the high-degree spatiotemporal coupling between high-quality source-reservoir and favorable accumulation processes within the superimposed aulacogen-uplift setting is key to shale gas enrichment.Fourth,four types of plays are identified in the Qiongzhusi Formation:continuously coupled(Type Ⅰ),stage-coupled(Type Ⅱ),and late-stage modified(Type Ⅲ)enriched plays,as well as spatiotemporally mismatched or locally destroyed(Type Ⅳ)play.In conclusion,this study improves the dynamic accumulation theories of shale gas in the Qiongzhusi Formation,and provides important theoretical support for the accurate sweet spot prediction and large-scale,efficient development of deep shale gas in the Sichuan Basin.关键词
四川盆地/筇竹寺组/槽-隆/时空耦合/页岩气/富集规律/评价优选Key words
Sichuan Basin/Qiongzhusi Fm/Aulacogen-uplift/Spatiotemporal coupling/Shale gas/Enrichment pattern/Evaluation and selection分类
能源科技引用本文复制引用
石学文,高翔,吴伟,宋芳,朱逸青,杨雨然,杨一茗,王烨,伍秋姿,张入化..四川盆地筇竹寺组页岩气"槽-隆"时空耦合富集规律[J].天然气工业,2026,46(7):60-76,17.基金项目
新型油气勘探开发国家科技重大专项"四川盆地全油气系统与新领域勘探技术"(编号:2025ZD1400400)、中国石油天然气股份有限公司科技项目"新区新层系有利区优选与勘探评价关键技术研究"(编号:2023ZZ21YJ04)、中央在川高校院所"聚源兴川"项目"复杂区页岩气勘探选区评价技术示范及应用"(编号:2024ZHCG0183). （编号:2025ZD1400400）
