Association of methane with coal poses a serious explosion risk in underground coal mining. Besides, it is a potent green house gases significantly contributing to global warming. Therefore, its commercial exploitation is being widely recognised as (a) a fuel resource to bridge the energy gap (b) making coal mining safer (c) providing cleaner energy and (d) checking the building of green house ...

In-situ stress is an important indicator for the preferential selection of coalbed methane (CBM) exploration dessert zones, and a key factor affecting production capacity wells. Coal reservoir permeability one parameters to evaluate recoverability modifiability reflects seepage coal reservoirs. In this study, in situ data were collected from multiple injection/fall-off tests parameter wells wes...

The coal permeability is an important parameter in mine methane control and coal bed methane (CBM) exploitation, which determines the practicability of methane extraction. Permeability prediction in deep coal seam plays a significant role in evaluating the practicability of CBM exploitation. The coal permeability depends on the coal fractures controlled by strata stress, gas pressure, and strat...

The sorption-induced porosity and permeability alteration of coal beds as pore pressure and in-situ stress are varied can be couched within the frameworks of ‘open thermodynamic system' and ‘open-system geomechanics' (OSG). Production from coal bed methane (CBM) reservoir changes not only the fluid mass (gas and water) but also solid mass as a result of methane desorption from rock matrix. The ...

Title of Document: ESSAYS ON SPLIT ESTATE IN ENERGY DEVELOPMENT Timothy W. T. Fitzgerald, Ph.D., 2008 Directed By: Professor Kenneth McConnell Agricultural and Resource Economics Taking advantage of randomly-assigned federal mineral rights, the first essay establishes the discount that mineral developers place on oil and gas leases with divided ownership. This discount is interpreted as an expe...

0016-2361/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.fuel.2009.11.005 * Corresponding author. Tel.: +86 10 82320892; fax E-mail address: [email protected] (Y. Yao). Nuclear magnetic resonance (NMR) has been widely used in petrophysical characterization of sandstones and carbonates, but little attention has been paid in the use of this technique to study petrophysical properties of coal...

The gas/fluid flowing behavior and fluid distribution under capillary forces in porous media are essential for evaluating the pore-fracture characteristics of coal. Capillary force is crucial flow-back efficiency after hydraulic fracturing during enhanced coalbed methane (CBM) production. In this work, situ dynamic X-ray micro-computed tomography (X-ray ?-CT), field emission scanning electron m...