摘要
基于野外、钻井和地震资料分析,恢复四川盆地德阳—安岳侵蚀裂陷槽形成演化过程,并对勘探领域进行划分和评价。结果表明:①德阳—安岳侵蚀裂陷槽及周缘震旦系灯影组沉积特征具有明显差异。侵蚀裂陷槽北段灯影组发育深水沉积,盆地北部灯影组发育盆地—斜坡—台地边缘—局限台地沉积模式,中—南段灯影组为碳酸盐台地沉积环境。②德阳—安岳侵蚀裂陷槽是伸展裂陷和岩溶侵蚀作用叠加改造而成,侵蚀裂陷槽北段以拉张裂陷作用为主,中段和南段为桐湾多幕次侵蚀作用改造而成。基于侵蚀裂陷槽分段性成因,将其及周缘灯影组划分为盆地北部台缘岩性丘滩体、中部台内岩溶丘滩体和中—南部槽内岩溶残丘3大勘探领域,其中盆地中—南部槽内岩溶残丘是盆地天然气勘探战略突破新领域,北部台缘岩性丘滩体是盆地天然气万亿立方米资源增储新阵地。
Based on analysis of field survey,drilling and seismic data,the formation and evolution process of Deyang-Anyue erosion rift trough in Sichuan Basin was reconstructed,and exploration areas were divided and evaluated.The results show that:(1)Dengying Formation in and around Deyang-Anyue erosion rift trough varies widely in sedimentary characteristics.The Dengying Formation in the northern part of the erosion rift trough developed deep-water sediments,the Dengying Formation in the northern part of the basin varied gradually from basin to slope,platform margin,and limited platform facies,and the Dengying Formation in the middle and southern parts of the trough developed carbonate platform facies.(2)Deyang-Anyue erosion rift trough is formed by extensional rift and karst erosion jointly,the north section of the erosion rift trough is mainly the product of tensile rift,while the middle and south sections are formed by erosion in multi-episodes of Tongwan period.(3)Based on the segmented origins of the erosion rift trough,Dengying Formation in and around it is divided into three exploration fields:lithologic mound and beach bodies at the northern platform margin of the basin,karst mound and beach bodies in the central platform,and karst residual mounds in the central southern trough of the basin,among them,the karst residual mounds in the central southern trough of the basin are a new frontier for natural gas exploration in the basin,and the lithologic mound and beach bodies at the northern platform margin are a new position for increasing the reserves of trillions of cubic meters of natural gas resources in the basin.
作者
马奎
文龙
张本健
李勇
钟佳倚
王云龙
彭瀚霖
张玺华
严威
丁一
陈骁
MA Kui;WEN Long;ZHANG Benjian;LI Yong;ZHONG Jiayi;WANG Yunlong;PENG Hanlin;ZHANG Xihua;YAN Wei;DING Yi;CHEN Xiao(Research Institute of Petroleum Exploration and Development,PetroChina Southwest Oil and Gas Field Company,Chengdu 610041,China;Chengdu University of Techonology,Chengdu 610059,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2022年第2期274-284,共11页
Petroleum Exploration and Development
基金
国家重点研发计划项目(2017YFC0603106)
中国石油西南油气田公司科技处项目(20200301-01)。
关键词
四川盆地
震旦系灯影组
深水沉积
侵蚀裂陷槽
分段性成因
槽内岩溶残丘
台缘岩性丘滩体
Sichuan Basin
Sinian Dengying Formation
deep water deposits
erosion rift trough
segmented origin
karst mounds
platform marginal lithologic mounds and shoals
