Relations between Production of CBM and Water Discharge in Initial Production

Abstract:

Improving the productivity of CBM wells is one of the most emergency issues in the development of CBM. Preliminary characteristics of water discharge can indicate the productivity to some extent. Based on the data of 49 CBM wells in Fanzhuang Block, Qinshui basin, this paper makes research on the relations between the Preliminary characteristics of water discharge and CBM well production by theory of reservoir engineering. According to the index and quantity of water discharge, the CBM wells were divided into five types. Contrast this block, develop the I-type wells preferentially, reduce the fracture strength for the II-type wells, improve the fracturing technology for the IV-type wells, and shouldnt take the III & V-type wells into consideration generally.

• Periodical: Advanced Materials Research (Volume 868)
• Pages: 705-710
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.868.705
• Online since: December 2013
• Authors: Bei Bei Zhang*, Rui Wang, Yan Dong Xue, Juan Zhang, Bo Li, Ji Xing Zhang
• Keywords: CBM Well, Characters of Water Emission, Fanzhuang Block, Productivity

References

[1] Mengzhaoping, TianYongdong, Li Guofu. Theory and method of coal bed methane development geology[M]. Beijing: Science Press, (2010).

[2] LiuShiqi, Sang Shuxun, LiMengxi, etal. Key geologic factors and control mechanisms of water production and gas production divergences between CBM wells in Fanzhuangblock. Journal of China Coal Society, 2013, 38(2): 277-283.

[3] Li Jinhai, Su Xianbo, Lin Xiaoying, et al. Relationship between dischargerate and productivity of coalbed methane wells[J]. Journal of China Coal Society, 2009, 34(3): 376-380.

[4] Fan Bin, Qin Yi, Cui Jinbang, et al. Analysis of the influence of pressure drop velocity on CBM well production[J]. China coalbed methane , 2010, 7(6): 20-23.

[5] Zhang Jiantao. Fanzhuang Block coalbed methane type of well optimized selection and drilling schemeevaluation[D]. China University of Petroleum, (2011).

[6] Xian Bao'an, Gao Deli, Wang Yibing, et al. Analysis on applied mechanism of multiple laterals horizontal well in developingcoalbed methane[J]. Coal Geology& Exploration, 2005(06): 34-37.

[7] ZhangPeihe, ZhangMingshan. Analysis of application status and adapting conditions for different methods of CBM development[J]. Coal Geology& Exploration, 2010(02): 9-13.

[8] Huang Shaohua, Sun Tongying, Ji Kun, et al. CBM Early Stage Production Characteristics in Shizhuang Southern Block and Exploitation Proposals[J]. Coal Geology of China. 2013, 25(7): 13-17.

[9] Si Qinghong, Zhu Yanming, Cao Xinkuan. Caculation methods of well bottom-hole pressure drop in initial stage[J]. China coalbed methane, 2011, 8(1): 37-39.

[10] Ni Xiaoming, Wang Yanbin, WuJianguang, et al. Reasonable production intensity of coalbed methane wells in initial production[J]. Journal of Southwest Petroleum University. 2007, 29(6): 101-104.