摘要
为了研究含油气盆地油源断裂处油气富集规律,在油源断裂输导油气条件及其演化阶段研究的基础上,根据油源断裂活动时期和源内、源外油气中转站形成时期,确定了油源断裂输导源内和源外中转站油气时期,建立了油源断裂输导油气演化阶段的确定方法,并利用其确定渤海湾盆地歧口凹陷南大港断裂向沙一下亚段输导油气演化阶段。结果表明:南大港断裂向沙一下亚段输导沙三段源内中转站油气阶段从馆陶组沉积开始至明化镇组沉积中期,输导沙三段源内外中转站油气阶段从明化镇组沉积中期至结束;经历了2个演化阶段,输导油气时期相对较长,有利于来自下伏沙三段源岩的油气在沙一下亚段内大规模聚集成藏。根据本文方法确定油源断裂输导油气演化阶段,能合理解释目前南大港断裂处沙一下亚段油气最富集的现象。此方法适用于油源断裂输导油气演化阶段的确定。
In order to study the law of hydrocarbon enrichment at the oil-source fault in the petroliferous basin,based on the study on the conditions and evolution stage of oil-source fault transport,the method of determining the evolution stage of oil-source fault transport is established by determining the activity period of oil-source fault and the formation period of the oil-source fault transport in the oil source and the oil source outside the oil transfer station.The method is used to determine the evolution stage of oil and gas transport from Nandagang fault to the Lower Member of the Shahejie Formation in Qikou sag,Bohai Bay basin.The results show that,the oil and gas stage of Nandagang fault to the Lower Member of the Shahejie Formation to the Third Member of the Shahejie internal transfer station starts from the deposition of Guantao Formation to the middle deposition of Minghuazhen Formation;The oil and gas stage of the transfer station of the third stage is from the middle deposition to the end of the Minghuazhen Formation.After two evolutionary stages,the oil and gas transporting period is relatively long,which is conducive to the large-scale accumulation and accumulation of oil and gas from the underlying source rocks of the Third Member of the Shahejie Formation in the Lower Member of the Shahejie Formation.According to the method of this paper,it can reasonably explain the phenomenon of oil and gas enrichment in the lower sub-member of the Nandagang fault.This method is suitable for determining the evolution stage of oil and gas transport by oil-source faults.
作者
何春波
张亚雄
于英华
袁红旗
He Chunbo;Zhang Yaxiong;Yu Yinghua;Yuan Hongqi(School of Earth Sciences,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第4期1066-1074,共9页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(41572126)
黑龙江省自然科学基金项目(LH2022D013)
黑龙江省中央支持地方高校青年骨干人才项目(14011202101)。
关键词
油源断裂
输导油气
演化阶段
歧口凹陷
oil-source fault
transporting oil and gas
evolution stage
Qikou sag
