Productivity Prediction of Coalbed Methane Wells in the Southern Junggar Basin

Abstract:

Based on the coal reservoirs geological feature and coalbed methane (CBM) wells production data, and taken FS-2 well in the southern Junggar Basin as examples, history matching and productivity prediction of FS-2 well were conducted by using COMET3 numerical modeling software and the influence factors sensitivity of gas well productivity in the study area were analyzed. The results suggest: FS-2 well total gas production in the eight years was 2915007 m³, and the average daily gas production reached 1209.5m³/d, the CBM well belongs to medium production well. Permeability and gas content has the most effect on the single wells production in the study area, so the influence of the fracture half-length and coal seam thickness is weakened.

• Periodical: Advanced Materials Research (Volume 868)
• Pages: 669-672
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.868.669
• Online since: December 2013
• Authors: Jin Wang*, Jing Jing Fan, Xiang Hao Wang, Cheng Long Liu, Xin Zhang, Zhi Wei Liu
• Keywords: Coalbed Methane (CBM), Productivity Prediction, Sensitivity Analysis, Southern Junggar Basin

References

[1] Wang L G, Miao X X. Numerical simulation of coal floor fault activation influenced by mining[J]. Journal of China University of Mining & Technology, 2006, 16(4): 385-388.

DOI: 10.1016/s1006-1266(07)60031-5

[2] Wei C T, Qin Y, Fu X H, Jiang B, Li G Z, Song D Y, Jiao S H. Simulation of history of CBM concentration-dissipation in the middle southern Qinshui basin. Journal of China[J]. University of Mining & Technology, 2002, 31(2): 146-150. (In Chinese).

[3] Wang B, Jiang B, Liu L, Zheng G Q, Qin Y, Wang H Y, Liu H L, Liu G Z. Physical simulation of hydrodynamic conditions in high rank coalbed methane reservoir formation[J]. Mining Science and Technology, 2009, 19(4): 435-440. (In Chinese).

DOI: 10.1016/s1674-5264(09)60081-8

[4] Wei C T, Jiang B, Fu X H, Liu W P, Man L, Wu Y Z. Numerical simulation on geological evolution history of coalbed methane[J]. Acta Petrolei Sinica, 2007, 28(1): 54-57. (In Chinese).

[5] Chen Z H, Wang Y B, Yang J S, Wang X H, Chen Y P, Zhao Q B. Influencing factors on coalbed methane pro-duction of single well: a case of Fanzhuang block in thesouth part of Qinshui basin[J]. Acta Petrolei Sinica, 2009, 30(3): 409-412. (In Chinese).

[6] Zhang Peihe. Study on CBMWell Capacity Grading Scheme[J]. CHINA COALBED METHAN, 2007, 4(1): 28-30. (In Chinese).

[7] MA Dongmin. Analysis of gas production mechanism in CBM wells[J]. Journal of Xi'an University of Science and Technology, 2003, 23(2): 156-159. (In Chinese).

[8] Cai Dongmei, SUN Lidong, ZHAO Yongjun. Research on development mechanism of coal seam permeability based on coal evolution degree[J]. Journal of Shandong University of Science and Technology: Natural Science, 2009, 28(2): 22-27. (In Chinese).

[9] Chen Jiang, LU Jianwei, GUO Dongxin, WU Minjie. Factors and Development Technology of Coalbed Methane Production Capability[J]. RESOURCES & INDUSTRIES, 2011, 13(1): 108-113. (In Chinese).