鄂尔多斯盆地大牛地气田奥陶系风化壳储层特征及分布  

Characteristics and Distribution of Ordovician Weathering Crust Reservoirs in Daniudi Gas Field, Ordos Basin

作　　者：刘梅[1] 丁晓琪[1,2] 万友利[1] 白晓亮[2] 陈倩倩[1] 乐锦鹏[1] 

机构地区：[1]成都理工大学能源学院 [2]西南石油大学油气藏地质及开发工程国家重点实验室

出　　处：《海相油气地质》2014年第1期35-42,共8页Marine Origin Petroleum Geology

基　　金：国家重大科技专项<鄂尔多斯盆地大牛地致密低渗气田开发示范工程>(编号2011ZX05045-003)部分成果

摘　　要：据岩心观察、薄片镜下鉴定、物性特征分析及测井资料,大牛地气田奥陶系马家沟组风化壳储层类型为低孔低渗致密性储层。可将储层分为四类,其中最主要的类型为孔隙型储层,其次为溶蚀孔洞型储层和裂缝-孔洞型储层,再次为裂缝型储层。纵向上,以马家沟组五1、五2、五4、五5亚段为储层发育段。预测了有利储层在平面上的分布。Abundant petroleum resources are present in Ordovician Majiagou weathering-crust reservoirs in DaniudiGas Field, Ordos Basin. Based on the analysis of core observation, thin section identification, reservoir propertycharacters and logging data from the reservoirs, it is indicated that Majiagou reservoirs belong to tight ones with lowporosity and low permeability. The reservoirs can be classified into the dissolved porosity reservoirs （in majority）,the dissolved and fractured/vuggy ones and the fractured ones （in minority） in turn. In longitudinal, developingreservoir beds are Majiagou Ma1, Ma2, Ma4 and Ma5 members. Good reservoirs that distribute in plane are predicted forfurther exploration targets.

关 键 词：大牛地气田 奥陶系 马家沟组 风化壳储层 储层特征 储层预测 

分 类 号：TE122.23[石油与天然气工程—油气勘探]