Author: Fred N. Kissell
Publisher:
ISBN:
Category : Methane
Languages : en
Pages : 424

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Book Description

Author: Fred N. Kissell
Publisher:
ISBN:
Category : Methane
Languages : en
Pages : 26

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Book Description

Author: Fred N. Kissell
Publisher:
ISBN:
Category : Methane
Languages : en
Pages : 16

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Book Description

Author: Dong Chen
Publisher:
ISBN:
Category : Coalbed methane
Languages : en
Pages : 151

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Book Description
A reservoir simulation model is usually required to represent the combined effects of gas transport, water flow, and coal swelling/shrinking on the extraction of coalbed methane (CBM). Although a number of models have been developed in recent years, most of them are based on coal permeability models under the assumptions of uniaxial strain and constant overburden load. Under these assumptions, coal permeability is defined as a function of pore pressure only. This allows the gas transport and water flow to be decoupled from coal deformation. In this study, these two assumptions are relaxed: a general porosity and effective permeability model is developed to represent the behavior of both the primary medium (coal matrix) and the secondary medium (fractures) under conditions of variable stress. The effective permeability model is defined as a function of effective stress, and can be applied to the full spectrum of mechanical conditions spanning prescribed in-situ stresses through constrained displacement. Moreover the effect of matrix moisture is often ignored in previous simulation studies, but some experimental results showed that the presence of moisture in the coal matrix had profound influences on the gas storage and transport in coal seams by reducing the gas adsorption capacity of the coal, decreasing the gas effective diffusivity through the coal matrix, and varying the coal swelling strain. In order to investigate the magnitude and interplay the moisture effects on CBM production, approximate relationships have been built to quantify the moisture effect on the gas adsorption capacity, the gas effective diffusivity and the coal swelling strain. These relationships have been calibrated by comparison with a selection of literature data. Both the permeability model and the moisture effect correlations are implemented into a fully coupled model of coal deformation, gas transport in the matrix system, and gas-water flow in the fracture system. The FE model has been verified through the history matching of the gas and water production profiles in the Powder River Basin. The verified FE model is applied to conduct a series of parametric studies. These parametric studies illustrate important non-linear responses due to the effective stress that cannot be recovered where mechanical influences are not rigorously coupled with the two-phase flow system.

Author: M. Mercedes Maroto-Valer
Publisher: Elsevier
ISBN: 1845699580
Category : Technology & Engineering
Languages : en
Pages : 540

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Book Description
Carbon dioxide (CO2) capture and storage (CCS) is the one advanced technology that conventional power generation cannot do without. CCS technology reduces the carbon footprint of power plants by capturing, and storing the CO2 emissions from burning fossil-fuels and biomass. This volume provides a comprehensive reference on the state of the art research, development and demonstration of carbon storage and utilisation, covering all the storage options and their environmental impacts. It critically reviews geological, terrestrial and ocean sequestration, including enhanced oil and gas recovery, as well as other advanced concepts such as industrial utilisation, mineral carbonation, biofixation and photocatalytic reduction. Foreword written by Lord Oxburgh, Climate Science Peer Comprehensively examines the different methods of storage of carbon dioxide (CO2) and the various concepts for utilisation Reviews geological sequestration of CO2, including coverage of reservoir sealing and monitoring and modelling techniques used to verify geological sequestration of CO2

Author: Oak Ridge National Laboratory
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 948

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Book Description

Author: Oak Ridge National Laboratory
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 952

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Book Description

Author:
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 598

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Book Description

Author: Thomas M. Barczak
Publisher:
ISBN:
Category : Mine roof control
Languages : en
Pages : 452

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Book Description

Author: Jinze Xu
Publisher: Frontiers Media SA
ISBN: 2832511279
Category : Science
Languages : en
Pages : 145

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Book Description