Analysis of Productivity Controlling for Adjacent CBM Wells in Mining Subsidence Area: a Case in the Fanzhuang Block, Southern Qinshui Basin, China
Qingzhong Zhu, Zhengguang Zhang, Wensheng Zhang, Congcong Wu, Yongping Hang, Yangyang Li, Qiujia Hu
Available Online November 2016.
- https://doi.org/10.2991/icache-16.2016.49How to use a DOI?
- mining subsidence area; coalbed methane; positive and negative effect; permeability; gas content
- In order to analyze the productivity influence of mining subsidence area to adjacent coal seam gas wells, the paper studied physical properties and production characteristics of CBM wells in southwest Fanzhuang block. With changes of distance to mining subsidence area, distribution characteristics of gas content and permeability were expounded, variation character of gas production, water production of CBM wells were also analyzed. The mining subsidence area increased permeability of adjacent coal seam, meantime, reduced the gas content of coal seams, the coupling of positive and negative effects were main reasons for CBM production variability. The results indicates that with the increasing distance to mining subsidence area, the gas content increased gradually, and permeability decreased afterwards stable, the permeability achieved maximum value in depressurized zone; according to the production characteristics of CBM wells and permeability variation characteristics of adjacent coal seam, the around area of goaf was divided into zone I (pressure relief zone), zone II (intense interface area), zone III (weak interface area), zone IV (original coal district). Zone II and zone III are the most favorable area for high efficient development of CBM wells.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Qingzhong Zhu AU - Zhengguang Zhang AU - Wensheng Zhang AU - Congcong Wu AU - Yongping Hang AU - Yangyang Li AU - Qiujia Hu PY - 2016/11 DA - 2016/11 TI - Analysis of Productivity Controlling for Adjacent CBM Wells in Mining Subsidence Area: a Case in the Fanzhuang Block, Southern Qinshui Basin, China BT - 2016 2nd International Conference on Architectural, Civil and Hydraulics Engineering (ICACHE 2016) PB - Atlantis Press SP - 254 EP - 262 SN - 2352-5401 UR - https://doi.org/10.2991/icache-16.2016.49 DO - https://doi.org/10.2991/icache-16.2016.49 ID - Zhu2016/11 ER -