歧口凹陷复式含油气系统及构造控藏模式  

Compound Petroleum Systems and Tectonic Controlled Oil Reservoirs in the Qikou Sag,Bohai Bay Basin

作　　者：周江羽[1] 卢刚臣 李玉海 任建业[1] 于超[3] 祁鹏[1] 钱茂路[3] 

机构地区：[1]中国地质大学(武汉)构造与油气资源教育部重点实验室/资源学院,湖北武汉430074 [2]东方地球物理公司研究院大港分院研究所,天津300280 [3]中国石油大港油田分公司勘探开发研究院,天津300280

出　　处：《大地构造与成矿学》2010年第4期492-498,共7页Geotectonica et Metallogenia

基　　金：中国石油天然气股份有限公司重大专项(No:2008E-0601);国家自然科学基金(40672089)联合资助

摘　　要：构造层序和沉降史分析表明,歧口凹陷在新生代具有显著的幕式构造-沉积演化特征,经历了古近纪裂陷期和新近纪裂后期二个构造活动期、古近纪的裂陷Ⅰ幕和Ⅱ幕、新近纪的稳定热沉降幕和加速沉降幕四幕构造运动。结合凹陷内部重要的构造转换界面、结构和构造演化特点,以及各阶段构造样式和油气成藏聚集规律,将歧口凹陷划分为四大含油气系统:孔店断陷-潜山型含油气系统(Ek)、歧口陡坡断阶型含油气系统(Es)、歧口缓坡断阶型含油气系统(Es1+Ed)、歧口坳陷型含油气系统(N)。通过构造组合样式和油气聚集关系研究,建立了凹陷内部掀斜断块-地垒潜山和凹陷边缘断阶-古隆起披覆潜山构造控藏模式。The Qikou sag located on the middle of the Huanghua depression is a promising site for oil and gas exploration.Study of tectonic sequence and subsidence history shows that the depression underwent four episodes of tectonic movement in the Cenozoic,which include two phases of tectonic activities of Paleogenic synrifting and Neogenic postrifting,the phase I and phase II of the Paleogenic rift,the stabile Neogenic thermal subsidence and accelerated subsidence.Four types of petroleum systems in the Qikou sag are proposed based on the major tectonic boundaries in the depression,the structure and tectonic evolution,as well as the structural patterns and hydrocarbon accumulation,i.e.,the Kongdian fault-buried hill（Ek）,steep slope step-fault（Es2 ＋3）,smooth slope stepfault（Es1 ＋ Ed）,and depression petroleum system（N）.Two models for tectonic controlled oil reservoirs are suggested based on analysis of the tectonic patterns and hydrocarbon accumulation,i.e.,tilted fault block-horst buried hill within the depression,and step-fault-draping buried hill on paleo-uplift near the depression.

关 键 词：复式含油气系统 构造控藏 歧口凹陷 渤海湾盆地 

分 类 号：P542[天文地球—构造地质学] P618.13[天文地球—地质学]