The Shale Reservoir Characteristic of Dalong Formation Upper Permian in Chaohu-Jingxian, Lower Yangtze Area
详细信息
- 责任者：Chen Ping (Key Laboratory of Tectonics and Petroleum Resources ; Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhang Minqiang
- 刊名：Acta Petrologica Sinica
- 出版年：2013
- 卷期：29(8)
- 关键词：页岩气 ; shale gas ; 碎屑岩储集层 ; clastic reservoirs ; 安徽 ; Anhui Province
- 页码：p.2925-2935
- 图表：8 illus., 4 tables, 40 refs.
- 分类号：1003
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Based on the measured outcrop profiles,the shale reservoir characteristics of Dalong Formation in Chaohu-Jingxian area were analyzed. The result shows that with a thickness of 12 ～ 35m,the Dalong Formation were deposited in a lean oxygen-anaerobic quiescent environment,and composed of black carbonaceous or siliceous shales. In the shales,the content of the calcareous or siliceous brittle minerals is about 65% ～ 93% ,the content of clay minerals is about 5% ～ 30% ,and the TOC content is about 2. 05% ～ 13. 9% . The maturity of organic matter is about 1. 45% ～ 2% ,reaching maturation to post maturation stage. The shale porosity of Dalong Formation is 0. 476md,and the permeability is 0. 001×10-3μm2 . In addition,four kinds of micro-pore were identified: residual original pore,secondary dissolution pore,secondary intercrystalline pore and microfissure. With the feature of"high siliceous content,high bittleness,high TOC content and porous",the black shales of Dalong Formation possess the characteristic of high quality source rocks and the good prospect of exploration and development.
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