1887

Abstract

Summary

Gas production in coalbed methane (CBM) wells is a variable controlled by many factors, which is difficult to be predicted. An additional complexity is added if only conventional logging data is provided. In this article, new methods to evaluate two indexes (coal texture index and water bearing index) are developed using caliper, spontaneous potential and resistivity curves. Then, five important factors which are highly related to gas production are put forward, covering storage condition and hydrogeological condition. Based on these five factors, a quantitative prediction model is established. Applying to a total of 97 CBM wells, results indicate this method is effective, with an accuracy of 79%. This method can be used as a helpful tool in CBM investment and development. It can also be used to evaluate the reservoir parameters for newly discovered reservoirs, including coal texture, initial water-in-place and gas production. With these, CBM wells can be better evaluated and production costs can be saved a lot.

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/content/papers/10.3997/2214-4609.201700652
2017-06-12
2024-04-24
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References

  1. TengJ., YaoY.B., et al.
    [2015] Evaluation of coal texture distributions in the southern Qinshui basin, North China: Investigation by a multiple geophysical logging method. Int. J. Coal Geol., 140, 9–22.
    [Google Scholar]
  2. LvY.M., TangD.Z, et al.
    [2012] Production characteristics and the key factors in high-rank coalbed methane filed: A case study on the Fanzhuang Block, southern Qinshui Basin, China. Int. J. Coal Geol., 96, 93–108.
    [Google Scholar]
  3. Pashin, J.C.
    [2010] Variable gas saturation in coalbed methane reservoirs of the Black Warrior Basin: Implication for exploration and production. Int. J. Coal Geol., 82, 135–146.
    [Google Scholar]
  4. SuX.B., LiuX. Y., LiuS.H, et al.
    [2005] Geology of coalbed methane reservoirs in the South-east Qinshui Basin of China. Int. J. Coal Geol., 62, 197–210.
    [Google Scholar]
  5. ZhangS.H., TangS. H., LiZ.C, et al.
    [2016] Study of hydrochemical characteristics of CBM co-produced water of the SZN Block in the southern Basin, China. Int. J. Coal Geol., 159, 169–182.
    [Google Scholar]
  6. XueC.W., LiuH.F., et al.
    [2012] Deformed coal types and pore characteristics in HC coalmines in Eastern Weibei coalfields. Int. J. Min. Sci. Technol. 22, 681–686.
    [Google Scholar]
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