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Mining Publication: Behavior of Coal-Gas Reservoirs
Keywords: Boreholes Gas emissions
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: May 1969
Authors: J Cervik
Reference - May 1969
Download PDF Document (1.00 MB)
NIOSHTIC2 Number: 10000175
U.S. Department of the Interior, Bureau of Mines. Technical Progress Report 10, 1969; :1-12
Gas occurs in coalbeds in an adsorbed and a free gas state. Adsorbed gas is stored in the micropore structure and its transport is governed by Fick's law. The free gas occurs in the fracture system and flows according to Darcy's law. These two modes of mass transport are interdependent. Production decline curves of coal-gas wells are of the constant percentage decline type and, thus, show no indications of flow characteristics peculiar to coal-gas reservoirs. The effectiveness of surface boreholes as a degasification scheme depends upon both good fracture permeability and a high fracture density. Conventional methods of reservoir engineering analysis are not applicable to coalbeds.
Image of publication Behavior of Coal-Gas ReservoirsReference - May 1969
Download PDF Document (1.00 MB)
NIOSHTIC2 Number: 10000175
U.S. Department of the Interior, Bureau of Mines. Technical Progress Report 10, 1969; :1-12
See Also
Analysis and Prediction of Longwall Methane Emissions: A Case Study in the Pocahontas No. 3 Coalbed, VA
Cableless Electronic Surveying Systems for Horizontal Holes
Comparison of Rotary and In-Hole Motor Techniques for Drilling Horizontal Boreholes in Coal
Demonstration of Remote Mine Seal Construction
Evaluation of the Relative Importance of Coalbed Reservoir Parameters for Prediction of Methane Inflow Rates During Mining of Longwall Development Entries
Longwall Gob Degasification With Surface Ventilation Boreholes Above the Lower Kittanning Coalbed
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder System
Use of a Sodium Silicate Gel Grout for Plugging Horizontal Methane-Drainage Holes
Page last reviewed: June 2, 2016
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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