摘要
大牛地气田位于鄂尔多斯盆地伊陕斜坡北部,主要含气层位为石炭系太原组、二叠系山西组和下石盒子组。气田具有石炭系太原组和二叠系山西组二套烃源岩,源岩类型有煤层、暗色泥岩和灰岩;气田具有石炭系太原组障壁砂坝、二叠系山西组三角洲平原分流河道砂和下石盒子组河流相河道砂三套储集体,储集体为低孔、低渗、致密性储层;上石盒子组沉积的湖相厚层泥岩为气田区域盖层,局部盖层有太原组、山西组、下石盒子组沉积的泥质岩,具有多封盖体系;生储盖组合有下生上储式和自生自储式;气田主要发育岩性圈闭;各种的地质特征表明大牛气田为一典型的复式气田。
The Daniudi gas field is located in the north of Yishan slope,E’erduosi basin.The mainly gas-bearing formation are Taiyuan formation(Carboniforous),Shanxi formation and lower Shihezi formation(Permin).The hydrocarbon source rocks in the field are Taiyuan formation and Shanxi formation,and they have three kinds of type:coal bed,dark mudstones and limestones.there are three suit of reservoir rock that are the barrier bar in Taiyuan,delta-plain distributary channel sandbodies in Shanxi and fluvial facies channel sandbodies in lower Shihezi.The reservoir are of the low porosity,low permeability tight sandstone.The regional cover of the field are the lake facies thick mudstones in upper Shihezi formation,and the local cover are mudstones in Taiyuan,Shanxi and lower Shihezi.They form the multi-cover system.The source-reservoir-seal assemblage include two types:the lower formation generate gas,the upper formation store gas,and gas generated and stored within the same formation.The field grow mainly the lithologic traps.All of the characteristics show that the Daniudi is a typical compound gas field.
出处
《西南石油学院学报》
CSCD
北大核心
2005年第2期17-21,共5页
Journal of Southwest Petroleum Institute
关键词
鄂尔多斯盆地
大牛地
复式气田
地质特征
E’erduosi basin
Daniudi
compound gas field
geological characteristics
