Scheme for Subdivision of Tectonic Coal Systematics: Implications for Coalbed Methane Development
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    Abstract:

    The geotectonic framework of coal has become highly complicated owing to superimposition and reworking by multiperiodic tectonism in China. On the basis of a series of characteristics, such as geotectonics, coal geology, coalbed methane geology, rheology, a new classification of tectonic coal has been established. There are two evidently types of tectonic coal systematics, i.e. unconsolidated coal rock and consolidated coal rock, the former named dispersed coal series, the latter may be subdivided into cataclastic coal series and mylonitic coal series. Furthermore, the series may be subdivided into several subtypes, according to the size of coal fragment and particle diameter and the content of matrix. Meanwhile, an examination of CBM from the inside outward tectonic coal shows that equilibrium of adsorption and desorption of CBM has been broken by tectonic force during crucial tectonic periods, thus tectonic coal petrotectonic assemblages are characterized by great intense heterogeneity CBM reservoir. Therefore new methods such as refracturing, multilateral well, heating drive gas technology, and roof and locked middlings stimulating have been proposed so as to deal with the variety and complicated geological problems of the CBM development.

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.2013. Scheme for Subdivision of Tectonic Coal Systematics: Implications for Coalbed Methane Development[J]. Geological Review,59(5):919-923.

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History
  • Received:October 09,2012
  • Revised:February 06,2013
  • Adopted:
  • Online: September 16,2013
  • Published: