Feasibility of Multi-layer Drainage for No 3 and No 15 Coal Seams in the Fanzhuang Area
Received date: 2009-06-16
Revised date: 2009-08-21
Online published: 2010-02-10
The implement of separate layer fracturing and multiple layer drainage for coalbed methane in the multiple coal seams is an important method to reduce the costs of exploration and development, and to increase the gas production. It is important for the skillful know of the adaptive conditions to increase successful ratio. According to gas-producing characteristics of coalbed methane vertical wells, the main factors constrained multi-layer drainage in No 3 and 15 coal beds in the Fanzhuang area were discussed. The characteristics such as surrounding rock, physical property of coal reservoir and permeability after hydraulic fracture were gained from the exploration and development data in the study area. According to file of exploration and development and groundwater dynamic, the pattern of force and velocity of a current groundwater in No 3 and 15 coal bed areas were gotten. By Darcy′s law and drainage for coal bed methane wells, the adaptive regions for multi-layer drainage of coal bed methane were chosen. The early production system tested the dependability of theoretical analysis.
NI Xiao-Ming, SU Xian-Bo, LI Guang-Sheng . Feasibility of Multi-layer Drainage for No 3 and No 15 Coal Seams in the Fanzhuang Area[J]. Natural Gas Geoscience, 2010 , 21(1) : 144 -149 . DOI: 10.11764/j.issn.1672-1926.2010.01.144
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