渤海湾盆地黄骅坳陷港北多层系潜山结构特征与成藏模式  

Structural characteristics and hydrocarbon accumulation models of Gangbei multi-layer buried hill in Huanghua Depression,Bohai Bay Basin

作　　者：高长海[1,2] 孟士达 查明[1,2] 楼达[3] 李宏军[3] 潘守旭 GAO Changhai;MENG Shida;ZHA Ming;LOU Da;LI Hongjun;PAN Shouxu(Shandong Provincial Key Laboratory of Deep Oil & Gas(China University of Petroleum (East China)), Qingdao 266580, China;Shandong Provincial Key Laboratory of Reservoir Geology(China University of Petroleum (East China)), Qingdao 266580, China;Research Institute of Exploration and Development, PetroChina Dagang Oilfield Company, Tianjin 300280, China)

机构地区：[1]山东省深层油气重点实验室(中国石油大学(华东)),山东青岛266580 [2]山东省油藏地质重点实验室(中国石油大学(华东)),山东青岛266580 [3]中国石油大港油田勘探开发研究院,天津300280

出　　处：《中国石油大学学报（自然科学版）》2022年第3期36-45,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：山东省自然科学基金项目(ZR2021MD077);国家科技重大专项(2017ZX05001-001-006)。

摘　　要：渤海湾盆地黄骅坳陷港北潜山于中、古生界取得勘探突破,开启多层系潜山油气勘探新领域。由于多层系潜山复杂的多元结构特征及成藏地质条件,导致对其结构特征、地层展布以及成藏特征等认识不清。根据地震、测井、录井、试油及测试等资料,对港北潜山的结构特征与成藏模式进行研究。结果表明受控于多期次构造、沉积演化及港西断裂翘倾作用,港北潜山横向上呈“东西成排、南北分段”的构造格局,纵向上呈多层系叠置的“屋脊状”三元结构特征,由下古生界、上古生界和中生界3套地层组成,分别以奥陶系碳酸盐岩、二叠系碎屑岩和侏罗系火山岩为主要储层,这些优质储层与内幕隔层组合形成多层系潜山;港北多层系潜山具有良好的油气成藏地质条件,发育2套烃源岩、3套储集层、8套储盖组合,受控于输导体系构建的2类源储配置及2期油气充注,形成“晚期双源混注、断储复合输导、源储配置控藏、多层系差异聚集”的潜山成藏模式;多层系潜山广泛发育于渤海湾盆地中、古生界,且勘探潜力大,是今后潜山勘探的重要目标。Exploration breakthrough has been made in the Gangbei buried hill in Huanghua Depression of the Bohai Bay Basin developed in the Mesozoic and Paleozoic,which results in a new field of multi-layer buried hill oil and gas exploration.Due to the complex multi-structure characteristics and accumulation geological conditions of multi-layer buried hills,the structural characteristics,stratigraphic distribution and accumulation characteristics are unclear.Combined with seismic data,well logging,oil testing and sample testing,the structural characteristics and accumulation model of the Gangbei buried hill were discussed.The results show that the Gangbei buried hill presents a tectonic framework of"east-west row and south-north segment"horizontally and a"ridge-like"ternary structure with multi-layer superimposition vertically,which is controlled by multi-stage tectonic-sedimentary evolution and the tilting of the Gangxi fault.It is composed of three sets of strata of Lower Paleozoic,Upper Paleozoic and Mesozoic,and the main reservoirs are the Ordovician carbonate rock,Permian clastic rock and Jurassic volcanic rock,respectively.The combination of these high-quality reservoirs and inner barriers forms a multi-layer buried hill.The Gangbei multi-layer buried hill has good geological conditions for hydrocarbon accumulation,and developed two sets of source rocks,three sets of reservoirs,and eight sets of reservoir-cap assemblages.Controlled by the two types of source-reservoir configurations constructed by the transport system and the two stages of hydrocarbon charging,the Gangbei buried hill forms the hydrocarbon accumulation model of"the late dual source mixed injection,fault reservoir compound transport,source reservoir configuration controlled reservoir,and multi-layer differential accumulation".The multi-layer buried hills are widely developed in the Mesozoic and Paleozoic in the Bohai Bay Basin,and has a great exploration potential,making it an important target for future buried hill exploration.

关 键 词：多层系潜山 结构特征 成藏模式 港北潜山 黄骅坳陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]