石油勘探与开发2026，Vol.53Issue(4)：863-876,14.DOI:10.11698/PED.20250675
德阳—安岳裂陷东侧震旦系灯影组四段储层差异化发育机理与预测
Differential development mechanisms and prediction of reservoirs in 4th Member of Sinian Dengying Formation on eastern side of Deyang-Anyue rift,Sichuan Basin,China
摘要
Abstract
Reservoirs of the 4th Member of the Sinian Dengying Formation(Deng-4 Member)around the Deyang-Anyue intraplatform rift in the Sichuan Basin are highly heterogeneous,alongside with unclear genesis and distribution of high-quality reservoirs.This study investigates the reservoirs of the Deng-4 Member in the Ningqiang area in the northern segment of eastern side of the rift,compares them with those in the Penglai area in the central segment and the central Sichuan paleouplift in the southern segment,and analyzes the differential development mechanisms of reservoirs on the eastern side of the rift.First,the Deng-4 reservoirs are facies-controlled,with stromatolite,framestone,and thrombolite dolomites serving as the main carriers of reservoir hosts.The preservation of pores was mainly controlled by early dolomitization,acid generation from microbial organic matter,a burial history characterized by prolonged shallow burial followed by late-stage accelerated deep burial,and early hydrocarbon charging.Second,the reservoirs show a differential pattern of development.The rimmed platform-margin reservoirs in the southern and northern segments of the rift have better development than the extensional fault-step platform-margin reservoirs in the central segment of the rift.The mode of prolonged shallow burial followed by late-stage accelerated deep burial in the northern segment is more conducive to the preservation of pores compared to the mode of continuous and uniform burial in the central and southern segment.Third,during the deposition of the lower-upper Deng-4 Member,the platform-margin microbial mound-shoal complex prograded from east to west perpendicularly to the platform-margin belt,and migrated from south to north parallelly to the platform-margin belt.The lower Deng-4 reservoirs are mainly distributed in the central and southern segments,the middle Deng-4 reservoirs in the central segment,and the upper Deng-4 reservoirs in Langzhong-Wangcang area of the northern segment and Penglai area of the central segment.These insights reveal that the Langzhong-Wangcang area in the northern segment of the rift,the central Sichuan paleouplift in the southern segment and the Penglai area in the central segment,has great potential of reservoir development in the Deng-4 Member.关键词
四川盆地/德阳—安岳台内裂陷/灯影组四段/微生物白云岩储层/白云石化/埋藏方式/早期油气充注/微生物有机质生酸Key words
Sichuan Basin/Deyang-Anyue intraplatform rift/the 4th Member of the Dengying Formation/microbial dolomite reservoir/dolomitization/burial mode/early hydrocarbon charging/acid generation from microbial organic matter分类
能源科技引用本文复制引用
金天杰,沈安江,梁峰,乔占峰,段军茂,李茜,杜秋定..德阳—安岳裂陷东侧震旦系灯影组四段储层差异化发育机理与预测[J].石油勘探与开发,2026,53(4):863-876,14.基金项目
国家自然科学基金企业创新发展联合基金项目(U23B20154) （U23B20154）
中国石油天然气集团有限公司前瞻性基础性科研项目(2026DJ010) （2026DJ010）
中国石油天然气股份有限公司勘探开发研究院科技项目(25KTKFSG002) （25KTKFSG002）
