A drainage data-based calculation method for coalbed permeability

@inproceedings{Lai2013ADD,
  title={A drainage data-based calculation method for coalbed permeability},
  author={Fengpeng Lai and Zhiping Li and Yingkun Fu and Zhihao Yang},
  year={2013}
}
This paper establishes a drainage data-based calculation method for coalbed permeability. The method combines material balance and production equations. We use a material balance equation to derive the average pressure of the coalbed in the production process. The dimensionless water production index is introduced into the production equation for the water production stage. In the subsequent stage, which uses both gas and water, the gas and water production ratio is introduced to eliminate the… CONTINUE READING

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