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Abstract
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Article Information:
Numerical Simulation of Coalbed Methane Seepage in Pinnate Horizontal Well Based on Multi-Flow Coupling Model
Tingting Jiang, Xiujuan Yang, Xiangzhen Yan, Yunhong Ding, Xin Wang and Tongtao Wang
Corresponding Author: Xiujuan Yang
Submitted: April 07, 2012
Accepted: April 23, 2012
Published: August 15, 2012 |
Abstract:
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The motive of the study is to establish a seepage flow model of pinnate horizontal well in infinite
reservoir according to the characteristics of 3D distribution of CBM pinnate horizontal well. Taking flow
pressure drop along the main and branch boreholes into consideration, the fluid flow formulas of CBM pinnate
horizontal well are proposed. The corresponding calculation program has been achieved based on C++
computer language to analyze the effects of branch symmetry, angle between main and branch boreholes,
branch number on isobar distribution, inflow profiles of branch and main boreholes of CBM pinnate horizontal
well. The results show that: the isobars present symmetry property by the main borehole when branches are
symmetrical. At the same time, production per unit length of main borehole at branch node declines rapidly
while the radial inflow curves of branch boreholes are almost the same. With the increasing of angle between
branch and main boreholes, isobars transfer into trapezoid from slantwise triangle, meanwhile, the inflow rate
of branch borehole increases gradually. Isobars transfer into irregular polygon with the increase of branch
number. Moreover, the inflow rate of main and branch boreholes all decreases with the increasing of branch
number.
Key words: Branch parameter, CBM pinnate horizontal well, flow coupling, numerical simulation, seepage flow model, ,
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Cite this Reference:
Tingting Jiang, Xiujuan Yang, Xiangzhen Yan, Yunhong Ding, Xin Wang and Tongtao Wang, . Numerical Simulation of Coalbed Methane Seepage in Pinnate Horizontal Well Based on Multi-Flow Coupling Model. Research Journal of Applied Sciences, Engineering and Technology, (16): 2881-2889.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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