An improved void-resistance model for abandoned coal mine gas reservoirs

作者：Shi Ji Quan^*; Rubio Ruben Martinez; Durucan Sevket

来源：International Journal of Coal Geology, 2016, 165: 257-264.

DOI：10.1016/j.coal.2016.09.001

• Abandoned coal mine gas reservoir
• Conceptual model development
• Void-resistance model
• Methane extraction

Previous studies have shown that the gas pressure behaviour of some abandoned coal mines may be described with the aid of a simple conceptual model, the so called void-resistance model. In this study, an improved void-resistance model has been developed and validated using previously collected data. Two model parameters, i.e. an apparent source/sink pressure and a time constant, which control the gas pressure behaviour during recharge and under certain gas production conditions, are defined. It has been shown that the two parameters can be determined via linear regression through analysing the historical abandoned mine gas pressure data during recharge. The void-resistance model developed has been successfully applied to analyse the historical pressure data recorded at two abandoned coal mines in Europe.

• 出版日期2016-8-1