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Evaluation of geological conditions for coalbed methane occurrence based on 3D seismic information: a case study in Fowa region, Xinjing coal mine, China

Li J., Li F., Hu M., Zhang W., Pan D.

Acta Geophysica

2017

Vol. 65, no. 2

345--351

The research on geological conditions of coalbed methane (CBM) occurrence is of great significance for predicting the high abundance CBM rich region and gas outburst risk area pre-warning. The No. 3 coal seam, in Yangquan coalfield of Qinshui basin, is the research target studied by 3D seismic exploration technique. The geological factors which affect CBM occurrence are interpreted based on the 3D seismic information. First, the geological structure (faults, folds, and collapse columns) is found out by the 3D seismic structural interpretation and the information of buried depth and thickness of the coal seam is calculated by the seismic horizons. Second, 3D elastic impedance (EI) and natural gamma attribute volumes are generated by prestack EI inversion and multi-attribute probabilistic neural network (PNN) inversion techniques which reflect the information of coal structure types and lithology of the roof and floor. Then, the information of metamorphic degree of seam and hydrogeology conditions can be obtained by the geological data. Consequently, geological conditions of CBM occurrence in No. 3 coal seam are evaluated which will provide scientific reference for high abundance CBM rich region prediction and gas outburst risk area pre-warning.

Technical-econmical evaluation of CHP plant fed with methane from hard coal bed

Stanek W., Twaruszka M.

Journal of Power Technologies

2014

Vol. 94, nr 3

211--218

The arguments supporting the development of cogeneration (CHP), among others based on methane from coal bed, are discussed in the presented paper. The resources of methane from coal beds are characterised and the prognosis of the CHP development are presented. The technical analysis of selected CHP plant basing on the regulations included in the Polish energy law has been carried out. The detailed economic analysis proved the profitability of application of the methane from coal bed as a fuel for CHP plants. It has been demonstrated that the important factor deciding of this profitability is the support system based on certificates for high efficient cogeneration. It has been also demonstrated that the further increase of the CHP efficiency is possible thanks to the realisation of tri-generation.