江汉盆地新沟嘴组致密油藏成藏特征及其形成环境  

Tight Oil Reservoir of Xingouzui Formation in Jianghan Basin:Characteristics and Its Environment

作　　者：程亮[1,2] 刘德华[2] 关富佳[1,2] 陈立欣[3] 

机构地区：[1]长江大学非常规油气湖北省协同创新中心,武汉430100 [2]长江大学和石油工程学院,武汉430100 [3]江汉油田江汉采油厂,潜江433124

出　　处：《科学技术与工程》2016年第6期148-156,共9页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05004-001-004)资助

摘　　要：江汉盆地新沟嘴组下段Ⅱ油组发育一套厚层泥岩沉积,并发育多套碳酸盐岩、粉砂岩夹层,具备形成致密油藏的良好条件。从烃源岩、储层特征,含油饱和度及其主控因素等方面详细总结了致密油藏特征,在此基础上,利用岩心、测井、分析化验等资料分析了江汉盆地新下Ⅱ油组致密油藏的形成环境。分析结果认为,致密油藏具有自生自储、烃源岩成熟度低,储层致密且厚度小、层数多,油藏含油饱和度低,油藏大面积准连续分布的特征。亚热带湿润气候下的盐湖沉积环境是决定致密油藏特点的主要因素。综合烃源岩及储层发育条件,初步确定了江汉盆地致密油藏有利分布区域。II oil layer of Xingouzui formation （ Exl- II ） in Jianghan basin has a thick mudstone sediments and development of many sets of carbonate rock and siltstone interlining, provide good conditions for tight oil accumulation. The characteristic of tight oil from source rock and reservoir characteristics, oil saturation, were summarized the main control factor was analyzed. On this basis, using the core, logging and analysis assay data to analyze the forming environment of the tight oil in Jianghan basin. The results of the analysis thinks, Xingouzui Formation tight oil has the following features： authigenic reservoir , source rocks is low mature, tight reservoir and small thickness, multi layer number, oil saturation is low, reservoir largely and continuously distribution. The salt water lake sedi- mentary environment under the subtropical zone humid climatic is main controlling factors of tight oil formation. Comprehensive conditions of source rock and reservoir development, preliminarily determines the density of Jianghan basin reservoir favorable distribution area.

关 键 词：江汉盆地 新沟嘴组 致密油 油藏特征 形成环境 

分 类 号：TE121.11[石油与天然气工程—油气勘探]