海洋地质前沿2025，Vol.41Issue(5)：55-64,10.DOI:10.16028/j.1009-2722.2024.065
大坎波斯盆地盐构造变形及其对盐上层系油气成藏的控制
Salt structural deformation and its control over hydrocarbon accumulation of post-salt layer system in the Great Campos Basin
摘要
Abstract
The Great Campos Basin is a salt rich oil and gas basin,with significant discoveries made in recent years in the pre-salt layers,while the post-salt layers are in a low exploration valley.In order to clarify the remain-ing exploration potential of the post-salt strata in the Great Campos Basin,a systematic analysis was conducted on the control effect of salt structural deformation on the stratigraphic structure,sedimentary evolution,and hydrocar-bon accumulation of the post-salt strata.The results are as follows:under the control of salt structure deformation,the post-salt layers develop detachment salt raft zone,diapir salt ridge zone,and nappe salt wall zone from west to east.The deformation of salt structures has restricted and transformed the deep water sedimentation of the post-salt drift strata.Early-stage salt structure deformation generally plays a limited role in overflow,guidance,and shielding of late-stage deep-water sedimentation,while late-stage salt structure deformation generally plays a transformation role in diapir and cutting of early-stage deep-water sedimentation.The deformation of salt struc-ture provides traps and migration pathways for the hydrocarbon accumulation in post-salt strata.Tectonic strati-graphic traps related to salt rock roll are generally developed in the detachment salt raft belt,mainly including rollover anticlines traps,stratum pinch out traps and fault block traps;The diapir salt ridge zone mainly develops structural traps related to salt rock diapirs,such as salt top anticline traps,salt flank barrier traps,and turtle back anticline traps.Salt windows and salt related faults that have been in an open state for a long time constitute the dominant channels for oil and gas migration.The research findings provide significant reference value for guiding the next-phase oil and gas exploration in the Great Campos Basin.关键词
盐构造变形/深水沉积/大坎波斯盆地/圈闭/运移通道Key words
salt structure deformation/deep water sedimentation/the Great Campos Basin/traps/transport path-way分类
地质学引用本文复制引用
程涛,陶维祥,李明刚,尹川,贾怀存..大坎波斯盆地盐构造变形及其对盐上层系油气成藏的控制[J].海洋地质前沿,2025,41(5):55-64,10.基金项目
中国海洋石油有限公司"十四五"重大科技项目"'两岸一带'重点盆地油气富集规律和成藏差异性研究"(KJGG2022-0901) （KJGG2022-0901）
