广覆式生烃理念在辽河东部凸起油气成藏中的应用  

Application of widely-covered hydrocarbon generation concept to hydrocarbon accumulation in Eastern Uplift,Liaohe Depression

作　　者：于鹏[1] 

机构地区：[1]辽河油田勘探开发研究院,辽宁盘锦124010

出　　处：《西安石油大学学报（自然科学版）》2014年第4期24-30,7,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中石油重点科技项目"辽河探区有利预探区带综合评价和目标优选"(编号:2008D-0702-02)

摘　　要：从烃源岩地层展布特征、生烃特征及影响生烃因素等方面分析辽河东部凸起古生界烃源岩,指出石炭—二叠系的煤系地层具有广覆式生烃特点,为油气藏的形成提供了丰富的源岩基础。从生储盖组合关系的角度将东部凸起油气藏类型划分为新生古储、自生自储和上生下储3种类型。油气成藏主控因素有2个:一是距离源岩较近的砂岩储层最易成藏;二是断裂相对不发育的区带使早期形成油气藏更易于保存。The distribution characteristics,the hydrocarbon generating characteristics and the factors influencing the hydrocarbon generating of hydrocarbon source rocks of hydrocarbon source rocks in Eastern Uplift,Liaohe Depression are studied,and it is pointed out that Carboniferous- Permian coal-bearing strata are of the feature of widely-covered hydrocarbon generation,which provides the rich basis of source rock for the formation of oil-gas reservoirs. According to the types of source-reservoir-cap rock association,oil-gas reservoirs in the studied area are classified to three types: young source- ancient reservoir type,self source-self reservoir type and top sourcebottom reservoir type. There are two factors controlling hydrocarbon accumulation: one is that hydrocarbon is the easy to accumulate in the sandstone reservoirs near source rocks; the other is that hydrocarbon is easy to be preserved in the zones where faults are not developed.

关 键 词：辽河东部凸起 古生界烃源岩 生储盖组合类型 广覆式生烃 成藏条件 主控因素 

分 类 号：TE121[石油与天然气工程—油气勘探]