CAJ | 학술논문

港西北坡位于大港探区北大港潜山构造带东北翼,沙三段沉积前与其沉积时期,受断裂活动迁移性控制,发生多次构造掀斜与构造反转,沙三段遭受多期剥蚀,在其顶、底及内部存在不整合界面.不整合面对油气运移和富集有重要作用,其附近存在地层削截与地层超覆现象,在港西岛物源控制下形成地层圈闭.在港西北坡西南缘沙三段寻找地层不整合油气藏,以构造背景为基础,开展层序地层学研究,追踪有利砂体分布范围,建立油气成藏模式.
항서북파위우대항탐구북대항잠산구조대동북익,사삼단침적전여기침적시기,수단렬활동천이성공제,발생다차구조흔사여구조반전,사삼단조수다기박식,재기정、저급내부존재불정합계면.불정합면대유기운이화부집유중요작용,기부근존재지층삭절여지층초복현상,재항서도물원공제하형성지층권폐.재항서북파서남연사삼단심조지층불정합유기장,이구조배경위기출,개전층서지층학연구,추종유리사체분포범위,건립유기성장모식.
The north slop of Gangxi is located in the northeastern tectonic belt of the Beidagang buried hill．Before and in the sedimentary period Of Es3 member,as it was controlled by the migration of faulted activity,there were multiple tectonic tilting and tectonic inversions，so Es3 member was denuded，and there were unconformable records on the top，bottom and internal of Es3 member．Unconformable surfaces had an important impact on the migration and concentration of hydrocarbon，formation truncation and overlapping occurred around unconformable surfaces．For the goal of finding unconformity reservoir of Es3 member in southwestern margin of north slop of Gangxi．By classifying and comparing sequence，tracing the distribution range of favor sand，the pattern of hydrocarbon accumulation was established，and finally a breakthrough in the exploration of unconformity hydrocarbon reservoir in Es3 member had been made.