Relations Between Productivity of CBM Vertical Wells and Coal Structure in Encun Mine Field
- 责任者：Ni Xiaoming (Institute of Energy Science and Engineering ; Henan Polytechnic University ; Jiaozuo 454000 ; China) ; Chen Peng
- 刊名：Natural Gas Geoscience
- 出版年：2010
- 卷期：21(3)
- 关键词：煤层气 ; coalbed gas ; 煤结构 ; coal texture ; 河南 ; Henan Province
- 页码：p.508-512
- 图表：4 illus., 2 tables, 9 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
According to elasticity theory of rock and state of natural fracture in different coal structures, the authors set up a model about the azimuth of natural fracture and the direction of the stress, and discussed the main controlling factors about main fractures in different coal structures. Based on azimuth of extended fracture and pressure spread contrail in the production process of CBM vertical wells, the authors got the relations between the productivity of CBM vertical wells and different coal structures. The production tests showed that under current hydraulic fracturing crafts the fragmentation coal would be the best coal reservoir, then primary structure coal, and the tectonic coal was hardly modified to improve production capacity of CBM vertical wells.