• 责任者：Zhang Yeyu (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhou Wen
• 刊名：Journal of Chengdu University of Technology
• 出版年：2013
• 卷期：40(6)
• 关键词：碎屑岩储集层 ; clastic reservoirs ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.671-676
• 图表：11 illus., 1 table, 12 refs.
• 分类号：1003
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

     Based on the geological analysis of single-well reservoirs,combined with the experimental analysis of the test samples,outcrop data and results of previous studies,this paper studies the shale reservoir characteristics of Member 7 of Triassic Yanchang Formation in Ordos Basin from the aspects of geochemical characteristics of shale,rock and mineral characteristics,reservoir conditions and physical properties,etc..Member Chang 7 reservoir is mainly deep lake-semi-deep lake sedimentary facies.The shale rich in organic materials is located in the south of the basin.The thickness of the shale in Xiasiwan-Fuxian and Yanchi-Jiyuan areas is maximum.The burial depth of the shale gradually increases from the south Weibei uplift to northwest and the depth is ＜2.5 km.The type of organic matter is mainly Type Ⅰ and secondly is Type-Ⅱ.The mass fraction of TOC is 0.51％～22.6％ and Ro is 0.7％～1.2％.Lithology is mainly black laminated shale and silty shale.The reservoir space of the shale is divided into matrix micropores and organic matter micropores.The matrix micropore is mainly composed of intergranular pore,intercrystalline dissolved pore,and intercrystalline pore of clay minerals,while the organic matter micropore is mainly oil pore and gas pore coming from organic material evolution.The physical property of the shale is characterized by low porosity and low permeability.Through the comprehensive study of the geochemical quality,rock mineral composition,reservoir conditions of this suite of shale reservoirs,the authors think that the shale reservoirs have a certain exploration and development potential of shale oil and gas.