Characterization of the Upper Es3 Inter-Salt Shale Reservoir in Liutun Sag, Dongpu Depression
详细信息
- 责任者：Luo Yang (Graduate School ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhao Yanchao
- 刊名：Acta Petrolei Sinica
- 出版年：2013
- 卷期：34(2)
- 关键词：碎屑岩储集层 ; clastic reservoirs ; 东濮凹陷 ; Dongpu Sag
- 页码：p.293-300
- 图表：illus., 2 tables, 19 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
Based on superpressure and heavy-oil characteristics of inter-salt shale reservoirs,the paper studied lithology,accumulation space,porosity,permeability and a variety of shale reservoirs by means of core description,X-diffraction analysis,SEM,measurements of porosity in lab and well logging data,and then made a classification and evaluation for inter-salt shale reservoirs in the upper part of the third member of the Shahejie Formation(Es3).The result showed that inter-salt shale reservoirs have a complex lithology because they are complex salt rhythms which are composed of clastic,carbonate and evaporitic rocks.Rigid minerals and total organic carbon are high,and organic matter type is good,with medium-to-low maturity.the formation pressure is high overpressure.Structural fractures and overpressure fractures are developed ubiquitously within shale reservoirs.Organic pores and matrix-related pores are relatively well developed,providing shale rocks with main storage space.Combination of organic pores and fractures increases permeability of shale reservoirs.On the basis of studies above,the upper Es3 inter-salt shale reservoirs can be divided into 4 types,providing an evaluation foundation for shale reservoirs in this area.
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