大倾角厚煤层煤层气开采井型优化及布井方法

doi:10.13722/j.cnki.jrme.2018.0911

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Abstract The wells at different positions have different production laws in the inclined coal seam, which is different from the flat seam. In order to enhance coalbed methane(CBM) recovery efficiency in the inclined seam， the well type and well pattern arrangement for the inclined coal seam were studied considering the effect of gravity differentiation. According to the characteristics of different structural positions of the inclined coal seam and combining gas-water distribution and well production laws，the well type and well pattern arrangement methods were optimized and verified by numerical simulation. The results show that the horizontal wells should be located at the top of the coal seam at the high position of the structure and along the inclined direction of the coal seam at the flank with the heel or the toe of the horizontal well lying at the bottom of the coal seam, and that vertical wells or T-shaped wells can be used in the low position of the struture. The well density should be increased at the high and low positions，and reduced at the structural wing. In anticline coal seam，umbrella-shaped well pattern is adopted. In monoclinic coal seam，well pattern can be arranged along the contour line of the coal seam，and the well row spacing increases gradually from both the top and the bottom to the wing.

Key words： mining engineering inclined coal seam gravitational differentiation coalbed methane well-type optimization well pattern arrangement numerical simulation

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	Articles by authors
	WANG Chaowen1
	PENG Xiaolong1
	ZHU Suyang1
	SUN Hansen2
	ZHANG Jian2
	LIN liang2

Cite this article:

WANG Chaowen1,PENG Xiaolong1,ZHU Suyang1, et al. Coalbed methane well-type optimization and well pattern arrangement for thick coal seam with a large dip angle[J]. , 2019, 38(2): 313-320.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0911 OR http://www.rockmech.org/EN/Y2019/V38/I2/313

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