A Study on Numerical Simulation of CBM Pinnate Horizontal Well for Near-Wellbore Seepage

Ting-Ting Jiang ； Xiu-Juan Yang ； Xiang-Zhen Yan ； Yun-Hong Ding ； Xin Wang ； Tong-Tao Wang

《Research Journal of Applied Sciences, Engineering and Technology》 4卷22期 (2012/11) Pp. 4791-4797

並列摘要

The motive of the study is to establish a near-wellbore seepage model of Coalbed Methane (CBM) pinnate horizontal well according to the potential superposition principle and the equivalent well diameter model. The corresponding calculation program has been achieved based on C++ computer language to analyze the effects of branch distribution, branch position and length on isobar distribution of CBM pinnate horizontal well. The results show that the isobar distribution of CBM pinnate horizontal well is closely related to its own wellbore configuration. When the two branches are at the same side, the isobars incline to the branch side. When the branch position moves from the heel end to the toe end along the main borehole, the morphology of isobars transforms from oval to slant triangle. With the increase of branch length, the influence on the morphology of isobars increases gradually.

並列關鍵字

Branch parameter ； coalbed methane ； near-wellbore seepage ； numerical simulation ； pinnate horizontal well