Geological controls on prediction of coalbed methane of No. 3 coal seam in Southern Qinshui Basin, North China

article i nfo In order to better understand the geological controls on coalbed methane (CBM) in Southern Qinshui basin (SQB), North China, geological surveys and laboratory experiments, including coal petrology analysis, proximate analysis and methane adsorption/desorption, were conducted. Results show that the coals from the SQB contain 0.59-3.54% moisture, 3.5-15.54% ash yield, 73.62-88.92% fixed carbon and 2.14-4.04% hydrogen, with C/H ratios in the range of 19.96-36.25. The vitrinite reflectance (Ro,m) ranges from 1.95 to 3.49%. The coals are composed of 18.5-97.4% vitrinite and 2.4-81.4% inertinite. The geologic structures, coal-bearing strata and coal depositional environment were studied by both field geological research and laboratory tests. A positive relationship is found between CBM content and basin hydrodynamics, in which CBM easily concentrates in the groundwater stagnant zone because of the water pressure. Furthermore, integrated geographical information system (GIS) and analytical hierarchy fuzzy prediction method (AHP) were used to evaluate the CBM resources in the SQB. The results show that the amount of CBM associated with the No. 3 coal seam in the SQB is 3.62×10 11 m 3 .T he CBM resource concentration (gas-in-place per square kilometer) in the SQB is in the range of (0.72- 2.88)×10 8 m 3 /km 2 , with an average of 1.21×10 8

[1]  C. Karacan.  Reservoir rock properties of coal measure strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from methane control and production perspectives , 2009 .

[2]  C. Özgen Karacan,et al.  Coal mine methane: A review of capture and utilization practices with benefits to mining safety and to greenhouse gas reduction , 2011 .

[3]  Huang Wen-hui,et al.  A Comprehensive Model for Evaluating Coalbed Methane Reservoirs in China , 2008 .

[4]  R. Bustin,et al.  Geological controls on coalbed methane reservoir capacity and gas content , 1998 .

[5]  Lynette Bloom,et al.  Implementation of enhanced areal interpolation using MapInfo , 1996 .

[6]  J. Hower,et al.  Geologic controls on thermal maturity patterns in Pennsylvanian coal-bearing rocks in the Appalachian basin , 2010 .

[7]  Bill Thoen.  Internet resources for the geosciences, with an emphasis on GIS and mapping , 1995 .

[8]  Xuehai Fu,et al.  Simulation study on evolution of coalbed methane reservoir in Qinshui Basin, China , 2007 .

[9]  Haiyang Pan,et al.  Productivity of coalbed methane wells in southern of Qinshui Basin , 2010 .

[10]  Ian D. Palmer,et al.  How Permeability Depends on Stress and Pore Pressure in Coalbeds: A New Model , 1998 .

[11]  C. Karacan,et al.  A numerical evaluation on the effects of impermeable faults on degasification efficiency and methane emissions during underground coal mining , 2008 .

[12]  M. Mastalerz,et al.  Evaluation of coalbed gas potential of the Seelyville Coal Member, Indiana, USA , 2004 .

[13]  Thomas L. Saaty,et al.  Time dependent decision-making; dynamic priorities in the AHP/ANP: Generalizing from points to functions and from real to complex variables , 2007, Math. Comput. Model..

[14]  Yan Song,et al.  Geology of coalbed methane reservoirs in the Southeast Qinshui Basin of China , 2005 .

[15]  Yanbin Yao,et al.  Fractal characterization of adsorption-pores of coals from North China: An investigation on CH4 adsorption capacity of coals , 2008 .

[16]  Luis G. Vargas,et al.  The theory of ratio scale estimation: Saaty's analytic hierarchy process , 1987 .

[17]  B. S. Hoyle,et al.  Application of object-oriented databases to geographic information systems , 1991 .

[18]  T. Saaty.  How to Make a Decision: The Analytic Hierarchy Process , 1990 .

[19]  Yanbin Yao,et al.  Coal reservoir characteristics and coalbed methane resource assessment in Huainan and Huaibei coalfields, Southern North China , 2009 .

[20]  Kweku-Muata Osei-Bryson,et al.  A process for generating quantitative belief functions , 1999, Eur. J. Oper. Res..

[21]  Romeo M. Flores,et al.  Coalbed methane: From hazard to resource , 1998 .

[22]  D. Creedy.  Geological controls on the formation and distribution of gas in British coal measure strata , 1988 .

[23]  K. Kitano,et al.  Relations between ash yield and chemical and mineral composition of coals , 1997 .

[24]  C. Ward.  Minerals in bituminous coals of the Sydney basin (Australia) and the Illinois basin (U.S.A.) , 1989 .

[25]  Ayodele Mobolurin,et al.  An approach to using the analytic hierarchy process for solving multiple criteria decision making problems , 1994 .

[26]  Hui Zhang,et al.  Characteristics of fissures and pores of anthracite in Jincheng by SEM , 2010 .

[27]  W. Hatton,et al.  New discoveries of coal in Mozambique — Development of the coal resource estimation methodology for International Resource Reporting Standards , 2012 .

[28]  C. W. Langenberg,et al.  Regional evaluation of the coalbed-methane potential of the Foothills/Mountains of Alberta, Canada , 2006 .

[29]  Yanbin Yao,et al.  Evaluation of the Coalbed Methane Potential by a GIS-Based Fuzzy AHP Model , 2009, 2009 Sixth International Conference on Fuzzy Systems and Knowledge Discovery.

[30]  Yanbin Yao,et al.  Preliminary evaluation of the coalbed methane production potential and its geological controls in the Weibei Coalfield, Southeastern Ordos Basin, China , 2009 .

[31]  B. Cardott.  Hartshorne coal rank applied to Arkoma Basin coalbed methane activity, Oklahoma, USA , 2013 .

[32]  C. M. Boyer,et al.  Methodology of coalbed methane resource assessment , 1998 .

[33]  Maria Mastalerz,et al.  Cleats and their relation to geologic lineaments and coalbed methane potential in Pennsylvanian coals in Indiana , 2007 .

[34]  J. Pashin.  Variable gas saturation in coalbed methane reservoirs of the Black Warrior Basin: Implications for exploration and production , 2010 .

[35]  Dameng Liu,et al.  Microscopic characteristics of microfractures in coals: an investigation into permeability of coal , 2009 .

[36]  Thomas L. Saaty,et al.  How to Make a Decision: The Analytic Hierarchy Process , 1990 .