Geological coalbed methane (CBM) reserves buried at a depth of about 2000 m in China amount are estimated at 36.81 trillion m3, ranking China as third in the world. Resources buried at depths greater than 1000 m account for 61.2% of total reserves. Compared with currently developed shallow coal seams, the deep beds have much more complex mechanical engineering characteristics: high in situ stress, high temperature, high karst water pressure, considerable mining disturbance, etc. Therefore hydraulic fracturing operations for deep coalbed methane (DCBM) are associated with problems that are not typical for shallow beds. Accordingly, in order to develop deep bed fracturing technology, we need to study types of proppants, fracturing fluids, fracturing supporting technology, etc. based on results of hydraulic fracturing of shallow coal seams.
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This work was done with the support of the strategic national project in the area of science and technology (2011ZX05042-002-001), the special fund project of the central government supporting development of regional universities and the open fund project of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (PLN1208).
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp. 27 – 31, January– February, 2015.
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Lu, Y., Yang, Z., Li, X. et al. Problems and Methods for Optimization of Hydraulic Fracturing of Deep Coal Beds in China. Chem Technol Fuels Oils 51, 41–48 (2015). https://doi.org/10.1007/s10553-015-0573-1
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DOI: https://doi.org/10.1007/s10553-015-0573-1