摘要
通过对四川盆地德阳—安岳裂陷及周缘构造、沉积、储集层及成藏组合等方面的深化研究,取得4项新认识。①德阳—安岳裂陷发育期,拉张动力作用下裂陷内发育多组断裂,形成震旦系灯影组二段(简称灯二段)多条垒控丘滩带;裂陷发展期边界断层控制灯影组四段(简称灯四段)发育规模台缘丘滩带;萎缩期,裂陷边缘发育寒武系沧浪铺组规模台缘颗粒滩。②灯二段、灯四段、沧浪铺组和寒武系龙王庙组4套规模丘滩体储集层与裂陷内外发育的筇竹寺组烃源岩及灯影组泥质灰(云)岩等多套烃源岩大面积叠合,形成良好的生储盖组合;致密岩性在侧向和上倾方向的封堵,形成各气藏独立保存的大型岩性气藏。③综合评价出6个大型岩性气藏有利勘探区带,分别是裂陷内北部灯二段垒控丘滩体、南部灯四段孤立岩溶丘滩体,北斜坡区灯二段、灯四段、沧浪铺组多期台缘丘滩体叠合区,裂陷西侧灯二段、灯四段台缘丘滩体,南斜坡区灯四段台缘丘滩体等。④在裂陷内灯二段垒控丘滩体上评价优选的蓬探1井和北斜坡台缘丘滩体上评价优选的角探1井,在多个目的层获得高产气流,发现了新的大气区,有望再形成(2~3)×10^(12) m^(3)的超级大气区,展示了与克拉通内裂陷相关的大型岩性气藏群巨大勘探前景。
By examining structures,sediments,reservoirs and accumulation assemblages in the Deyang-Anyue rift and its surrounding area,four new understandings are obtained.First,during the initiation period of Deyang-Anyue rift,multiple groups of faults developed in the rift due to the effect of tensile force,bringing about multiple mound and shoal belts controlled by horsts in the second member of Dengying Formation;in the development stage of the rift,the boundary faults of the rift controlled the development of mound and shoal belts at the platform margin in the fourth member of Dengying Formation;during the shrinkage period of the rift,platform margin grain shoals of Canglangpu Formation developed in the rift margin.Second,four sets of large-scale mound and shoal reservoirs in the second member of Dengying Formation,the fourth member of Dengying Formation,Canglangpu Formation and Longwangmiao Formation overlap with several sets of source rocks such as Qiongzhusi Formation source rocks and Dengying Formation argillaceous limestone or dolomite developed inside and outside the rift,forming good source-reservoir-cap rock combinations;the sealing of tight rock layers in the lateral and updip direction results in the formation model of large lithologic gas reservoirs of oil pool before gas,continuous charging and independent preservation of each gas reservoir.Third,six favorable exploration zones of large-scale lithologic gas reservoirs have been sorted out through comprehensive evaluation,namely,mound and shoal complex controlled by horsts in the northern part of the rift in the second member of Dengying Formation,isolated karst mound and shoal complex of the fourth member of Dengying Formation in the south of the rift,the superimposed area of multi-stage platform margin mounds and shoals of the second and fourth members of Dengying Formation and Canglangpu Formation in the north slope area,the platform margin mounds and shoals of the second and fourth members of Dengying Formation in the west side of the rift,the platform m
作者
魏国齐
杨威
谢武仁
苏楠
谢增业
曾富英
马石玉
金惠
王志宏
朱秋影
郝翠果
王小丹
WEI Guoqi;YANG Wei;XIE Wuren;SU Nan;XIE Zengye;ZENG Fuying;MA Shiyu;JIN Hui;WANG Zhihong;ZHU Qiuying;HAO Cuiguo;WANG Xiaodan(Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2022年第3期465-477,共13页
Petroleum Exploration and Development
基金
国家科技重大专项“大型油气田及煤层气开发”(2016ZX05007-002)
中国石油天然气股份有限公司科技项目(2021DJ0605)。
关键词
克拉通内裂陷
大型岩性气藏
成藏机制
四川盆地
震旦系—寒武系
德阳—安岳裂陷
台缘丘滩
intracratonic rift
large lithologic gas reservoir
accumulation mechanism
Sichuan Basin
Sinian-Cambrian
Deying-Anyue rift
mound and shoal belt
