Characteristics and Exploration Prospect of Unconventional Shale Gas Reservoirs in China
详细信息
- 责任者：Kang Yuzhu (Exploration and Development Research Institute ; SINOPEC ; Beijing 100083 ; China)
- 刊名：Natural Gas Industry
- 出版年：2012
- 卷期：32(4)
- 关键词：页岩气 ; shale gas ; 油气勘探 ; petroleum exploration ; 中国 ; China
- 页码：p.1-5
- 图表：2 illus., 6 tables, 10 refs.
- 分类号：1003
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
Unconventional hydrocarbon resources have become one of the major targets for oil and gas exploration at present in China,among which shale gas reservoirs are the best and the most practical choice.In view of this,this paper summarizes the characteristics of unconventional shale gas reservoirs in China: 1) dark shales mainly include marine,interactive marine and terrestrial deposit,and lacustrine mudstones and shales; 2) the common types are agrillaceous shale,carbonaceous shale,siliceous shale,and calcareous shale; 3) shale gas pooling are usually found in such hypoxia environments as closed bay,lagoon,deep lake,undercompensated basin,deep shelf,etc; and 4) the effective indexes for dark shales are generalized as follows: more than 0.5% in the TOC value,over 40% in the content of brittle minerals,less than 4 000 m in the burial depth,more than 30 m in effective thickness,and over 50 km2 in the effective area.Therefore,based on the fact of widely distributed dark shales all over China and the breakthrough made in shale gas exploration,it is predicted that shale gas resource reserves will be at least 60×1012～80×1012 m3 in China.With this great potential,shale gas resources will be the next important field of oil and gas exploration and development.In the end,this paper also suggests that other peculiar geological conditions like complex surface,burial depth,post-stage preservation,environmental protection,etc.should be highly focused on in the further shale gas exploration and development.