渤中凹陷西洼中央构造带新近系油气差异富集主控因素及成藏模式  

Main controlling factors of hydrocarbon accumulation and reservoir forming patterns in central structural belt of Neogene in the west of Bozhong sag

作　　者：郭瑞 张新涛 徐春强 杨传超 张震 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《东北石油大学学报》2017年第6期46-54,共9页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05023-006)

摘　　要：为了揭示渤中凹陷西洼中央构造带新近系油气差异富集规律,分析古隆起的发育特征、断层活动性、断—砂耦合接触关系及断层侧封条件,明确新近系油气差异富集的主控因素。结果表明:古隆起发育控制油气的宏观分布,其汇烃效率的强弱决定油气平面富集程度。断层活动性控制油气富集层位,主成藏期油源断层断距大于150m,断层活动速率大于10m/Ma,断层生长指数呈渐衰转盛型与直线上升型,油气主要富集于明下段;反之,油气主要富集于馆陶组,断砂耦合接触关系控制明下段油气的富集,复合型接触关系的砂体运移效率最高。馆陶组的油气富集主要受控于断层的侧封条件,当断层泥比率大于0.3时,断层侧向封堵性较好。建立的"断隆联控、差异富集"油气差异成藏模式,可有效指导渤中凹陷西洼的油气勘探部署。In order to reveal differential enrichment of hydrocarbons in the central structural belt in the west of Bozhong sag,this paper systematically studies characteristics of paleo-uplift,fault activity,configurations of faults and sand bodies and fault lateral sealing. The main controlling factors of hydrocarbon accumulation are summarized. Results show that the paleo-uplift controls the macroscopic distribution of oil and gas,oil and gas plane accumulation degree are controlled by the hydrocarbon gathering efficiency of paleo-uplif. The oil and gas accumulation horizon are controlled by the fault activity,when the fault throw was greater than 150 m,the fault activity rate was greater than 10 m/Ma,the fault growth index shows the gradually-declined-turned acted type and linear rising type,the oil and gas were mainly concentrated in Minghuazhen formation. However,in Guantao formation,the configurations of faults and sand bodies control the oil and gas accumulation in Minghuazhen formation,and the compound type has a higher oil and gas migration efficiency. The oil and gas accumulation in Guantao formation are controlled by the lateral sealing conditions of faults. When SGR is greater then 0. 3,the fault has a better lateral sealing. Finally,the paper established an oil and gas enrichment mode of " paleo-uplift and fault jointly control reservoirs and differential accumulation" in research area,which serves as an effective guidance to the exploration deployment of oil and gas exploration in western of Bozhong sag.

关 键 词：渤中凹陷西洼 新近系 油气成藏 古隆起 断层活动性 断一砂耦合 断层侧封性 

分 类 号：TE121.2[石油与天然气工程—油气勘探]