陇东地区延安组下部油藏类型及成因探讨  

Reservoir Types and Causes of Lower Yan'an Formation in Longdong Area

作　　者：范萌萌[1] 卜军 李文厚[3] 袁珍[4] 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]长庆油田分公司第二采油厂岭北作业区,甘肃庆阳745100 [3]西北大学地质学系,陕西西安710069 [4]西安石油大学油气资源学院,陕西西安710065

出　　处：《内蒙古石油化工》2012年第11期1-4,共4页Inner Mongolia Petrochemical Industry

基　　金：国家重点基础研究发展计划(973计划)基金资助项目(2003CB214602)

摘　　要：通过分析鄂尔多斯盆地陇东地区沉积、成岩、构造等条件,结合该区砂体分布和油气分布规律、各层段油藏控制因素和分布规律,研究陇东地区油气藏类型及成藏条件和成藏原因。陇东地区主要发育复合圈闭油藏和岩性油藏,其中,复合圈闭油藏主要是构造-岩性油藏,岩性油藏主要有三类:岩性上倾方向尖灭油藏、上倾方向遮挡油藏、致密砂岩圈闭油藏。岩性油气藏主要与成岩作用、砂体分布及岩相变化等地质因素有关;构造-岩性油气藏主要受构造、岩性两个因素控制。Base on analysis of deposition,diagenesis and structure,companied by sand bodies and hydrocarbon distribution,summarizing on control factor and distribution rule of hydrocarbon reservoirs in each lay,the paper studies the Reservoir type and origin of reservoirs of Longdong area.In this area,combination trap reservoir and lithologic reservoir are the two major types.The former is mainly structure-lithologic reservoir,and the latter contains three types: sandstone updip pinchout reservoir,screened oil accumulation and tight sandstone reservoir.The lithologic reservoirs are mainly associated with diagenesis,spatial distribution of sand bodies and changes of lithofacies,and structure-lithologic reservoirs are controlled by structure and lithology.

关 键 词：陇东地区 延安组 油藏类型 复合圈闭油藏 岩性油藏 

分 类 号：P618[天文地球—矿床学]