东营凹陷沙河街组断块油气藏成藏主控因素分析  

Main controlling factors about hydrocarbon accumulation in fault-block reservoir in Shahejie Formation of Dongying Sag

作　　者：于轶星[1,2] 庞雄奇[1,2] 陈冬霞[1,2] 贺玉婷[3] 

机构地区：[1]中国石油大学资源与信息学院盆地与油藏研究中心,北京102249 [2]中国石油大学教育部油气成藏机理重点实验室,北京102249 [3]中国石油化工股份有限公司西南油气分公司勘探开发研究院,贵州贵阳550004

出　　处：《断块油气田》2010年第4期389-392,共4页Fault-Block Oil & Gas Field

基　　金：国家"十五"科技攻关项目"济阳坳陷隐蔽油气藏成藏研究"(2003BA615A02)

摘　　要：东营凹陷断块油气藏发育广泛,沙河街组是勘探开发的重点。对东营凹陷沙河街组断块油气藏基本地质特征进行研究,分析断块油气藏成藏主控因素,从而指导油气勘探。东营凹陷沙河街组断块油气藏主要分布在中央背斜带、北部陡坡带和南部缓坡带,层位上分布在沙一段、沙二段和沙三上亚段。研究认为,东营凹陷沙河街组断块油气藏的聚集和分布受烃源岩、断层、异常压力和储层物性等因素的控制。沙四上亚段和沙三下亚段的优质烃源岩为油气成藏提供了良好的物质基础;异常压力为油气运移提供动力;断层不仅作为油气运移的通道,还控制着圈闭的形成;储层物性控制着油气藏的分布,孔隙度大于15%,渗透率大于10×10-3μm2的储层有利于油气聚集。Fauh-flock reservoirs are extensively distributed in Dongying Depression, and Shahejie Formation is the highlight of exploration and exploitation. According to the statistical analysis of the geological features of fault-block reservoir in Shahejie Formation of Dongying Depression, main controlling factors of fault-block reservoirs are studied for oil-gas exploration. The faultblock reservoirs of Shahejie Formation in Dongying Depression are mainly distributed in the central anticlinal belt, the northern steep slope belt and the southern gentle slope belt. The reservoirs are distributed in the first member, second member and the upper part of third member of Shahejie Formation. According to this study, the distribution and accumulation of fault-flock reservoirs is mainly controlled by the source rocks, faults, abnormal pressure and physical property of reservoir in Shahejie Formation of Dongying Depression. The excellent source rocks from upper Es4 and lower Es3 reservoirs provide the base of hydrocarbon accumulation and the abnormal pressure provides the driving force for hydrocarbon migration. The faults not only control the hydrocarbon migration, but also control the formation of trap. The reservoir distribution is controlled by the physical property of reservoir. The reservoirs, with porosity being higher than 15% and permeability being higher than 10×10-3μm2, are favorable for hydrocarbon accumulation.

关 键 词：断块油气藏 分布特征 主控因素 沙河街组 东营凹陷 

分 类 号：TF122.3[冶金工程—粉末冶金]