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- Title
沁水盆地中部断层发育区煤层气开发有利块段优选.
- Authors
倪小明; 李志恒; 王延斌; 吴建光
- Abstract
Finding out favorable CBM development sections in developing fault areas can deploy wells placement accurately and reduce the blind investment. According to the data on the southern of Shizhuang area, the floor traces were recovered about 3# coal seam after tectonic movement like stage of Yanshan, the early stage of Himalayan and the late stage of Himalayan by tectonic leveling method and wave superposition theory, the areas were divided into 18 blocks. According to the gas/water differentiation phenomenon, structural curvature method, coal structure observation method, the differences about the coal reservoir pressure and permeability after the tectonic movement effects were obtained. Then the favorable block and favorable block of CBM development were evaluated. The results show that: the escaping gas and formed coal near normal faults are the main reasons for low gas production. The relative high value blocks in the floor elevation in faults interval zones are of low permeability and low reservoir pressure, and gas potential is small; the relative low value blocks in the floor elevation in faults interval zones are of low permeability and relatively high reservoir pressure, and gas potential is medium; the relatively middle value blocks in the floor elevation in faults interval zones are of better permeability, and gas potential is better. The actual gas production about CBM wells verified the accuracy of theoretical analysis. The studying results can provide idea and reference for optimum favorable segments in developing fault areas.
- Publication
Natural Gas Geoscience, 2017, Vol 28, Issue 4, p602
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2017.03.003