增压型走滑转换带对大型圈闭的控制作用——以蓬莱19-3油田为例  

Control of contractional strike-slip transfer zone on large traps:a case study of Penglai 19-3 Oilfield

作　　者：杨波 吴庆勋 黄振 陈少伟 陈欣怡 YANG Bo;WU Qingxun;HUANG Zhen;CHEN Shaowei;CHEN Xinyi(Tianjin Branch of CNOOC(China)Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《海洋地质前沿》2025年第2期30-42,共13页Marine Geology Frontiers

基　　金：中国海洋石油有限公司“十四五”重大科技项目“近海重点潜在富烃洼陷评价技术”(KJGG2022-0301)。

摘　　要：蓬莱19-3特大型整装油田是渤海油田郯庐断裂带油气成藏的典型代表之一。目前油田发现三级石油地质储量达10亿t,但对其大型圈闭的形成机制尚无针对性报道。为了弄清蓬莱19-3油田圈闭的成因机制,本研究基于三维地震、钻井、构造正演模拟、沙箱物理模拟等地质资料分析,认为增压型走滑转换带控制了蓬莱19-3油田大型圈闭的形成,继而进一步探讨了增压型走滑转换带对蓬莱19-3油田大型圈闭的控制机制。蓬莱19-3构造是由多级、多类型转换带共同控制的大型背形构造,具有“间歇式增压隆升”和“排烃期定型”两大特点;其形成的大型圈闭与盖层、烃源岩晚期排烃形成了良好的时空配置关系。转换带研究对今后在走滑断裂带内寻找大中型油气田具有一定的借鉴意义。The Penglai 19-3 ultra large integrated oilfield is one of the typical representatives of oil and gas accumulation of the Bohai oilfields in the Tan-Lu Fault Zone.At present,tertiary petroleum geological reserves of the oilfield have reached one billion tons,but there is no targeted report on the formation mechanism of its large-scale traps.To clarify the formation mechanism of traps in Penglai 19-3 Oilfield,geological data were analyzed based on 3D seismic,drilling,structural forward simulation,sandbox physics simulation,and so on.It was believed that the contractional strike slip transfer zone controlled the formation of large traps in Penglai 19-3 Oilfield,and the controlling effect was further explored.The Penglai 19-3 Structure is a large-scale antiform structure controlled by multiple levels and types of transfer zones,characterized by"intermittent contractional uplifting"and"structural finalization during hydrocarbon expulsion".The large traps formed have a good spatiotemporal configuration relationship with late hydrocarbon expulsion from cap rocks and source rocks.The study of the transition zone has certain reference significance for finding large and medium-sized oil and gas fields in the strike-slip fault zone in the future.

关 键 词：蓬莱19-3油田 走滑断裂 增压型走滑转换带 控圈作用 

分 类 号：P744.4[天文地球—海洋科学] P736