渤海海域油气分布特征及主控因素  

Hydrocarbon distribution features and main controlling factors in the Bohai Sea waters

作　　者：刘小平[1,2] 周心怀 吕修祥[1,2] 朱秀香[1,2] 王海军[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学资源与信息学院,北京102249 [3]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《石油与天然气地质》2009年第4期497-502,509,共7页Oil & Gas Geology

基　　金：中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室开放基金项目(EEL2008-5)

摘　　要：渤海海域已探明油气储量中,构造油气藏所占比例最高(66.8%),其次是复合油气藏(25.9%)。占油气田总数34%的大中型油气田,探明油气储量却占总储量的84.4%。低凸起、凹中隆和凸起构造带油气探明储量最多,分别占总探明储量的45.3%,24.9%和22.0%。纵向上,61.0%的已探明石油储量和55.0%的已探明天然气储量集中分布于新近系地层中。93.2%的已探明石油储量和85.0%的已探明天然气储量分布在小于3000m的浅-中层储层内。渤海海域油气分布是海域烃源岩、沉积体系、构造及断裂体系发育与演化等一系列地质过程相互作用的结果。油气围绕富生烃凹陷近距离运移聚集;有利沉积相带、优质岩相及良好的物性决定了渤海海域发育优质储层;郯庐断裂及次级断裂控制了富生烃凹陷、圈闭及输导体系的形成与发育。Among the proved reserves in Bohai Sea waters, those from structural hydrocarbon pools account for the most,taking up 66.8% of the total, while complex pools contain second largest reserves （25.9%）. The number of the large/medium-sized fields only accounts for 34% of the total ,while their proven reserves account for 84.4 % of the total. Proven reserves are most numerous in structures of low salient, swell in sag, and salient, accounting for 45.3% ,24.9% and 22.0% respectively. Vertically,about 61.0% of the proven oil reserves and 55.0% of the proven gas reserves are distributed in the Neogene. About 93.2% of the proven oil reserves and 85.0 % of the proven gas reserves are distributed in the shallow to medium reservoirs with burial depth less than 3 000 m. The hydrocarbon distribution in Bohai Sea waters is the result of a series of geological processes,involving hydrocarbon source rock, depositional systems, structures, as well as fault systems. The hydrocarbons migrated in short distance and accumulated around the hydrocarbon kitchens. Factors such as favorable sedimentary facies belts, high-quality lithofacies, and favorable physical properties played important roles in the development of high-quality reserviors in Bohai Sea waters. The Tanlu fault and its induced faults controlled the formation and development of hydrocarbon kitchens, traps and carrier systems in the study area.

关 键 词：油气藏类型 探明储量 油气分布 渤海海域 

分 类 号：TE122.3[石油与天然气工程—油气勘探]