Characteristics of Shale Lithofacies and Reservoir Space of the Wufeng–Longmaxi Formation, Sichuan Basin
详细信息
- 责任者：Liang Chao (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Jiang Zaixing
- 刊名：Petroleum Exploration and Development
- 出版年：2012
- 卷期：39(6)
- 关键词：页岩气 ; shale gas ; 储集空间 ; reservoir space ; 四川盆地 ; Sichuan Basin
- 页码：p.691-698
- 图表：3 illus., 21 refs.
- 分类号：1003
- issnNo：ISSN1000-0747
- isbnNo：CN11-2360/TE
摘要
Based on observation of the outcrops and cores of the Late Ordovician to the Early Silurian Wufeng Longmaxi shale,developed in the deep water shelf environment,in the southeast of the Sichuan Basin,the mineralogical features,lithofacies characteristics and reservoir space types were studied and the factors affecting reservoir capacity were analyzed by observation through eletron microscope and analysis of mineral contant.The mineral composition is dominantly clastic quartz and clay minerals,with feldspar,calcite,dolomite,pyrite and so on.Five lithofacies were identified in the Wufeng–Longmaxi shale.Seven types of reservoir space were found in the Wufeng–Longmaxi shale.The development of reservoir space is strongly controlled by the mineral composition,lithofacies,organic carbon content,organic matter maturity and diagenesis.
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