Being controlled by the gas content of the reservoir, the productivity of CBM well is also mainly determined by its engineering quality and the physical property of the reservoir. In Dafosi mine field, 22 vertical wells from the “26 + 1” CBM wells project that was implemented since 2014 showed great difference in productivity after fracturing construction. With the consistent geological condition of coal reservoirs, fracturing construction parameters are suggested as the priority factor that controlling the well productivity. In this study, being combined with historical production and geological data, an optimized designation of fracturing construction parameters was established based on systematically comparative analysis of construction parameters such as discharge, the total volume of fracturing fluid, the quality of sand, sand ratio, which provides engineering basis for further fracturing construction of CBM wells.
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Li, T. and Wu, C. (2016) Influence of Pressure, Coal Structure and Permeability on CBM Well Productivity at Various Burial Depths in South Yanchuan Block, China. Earth Sciences Research Journal, 20, 1-9. https://doi.org/10.15446/esrj.v20n3.58000