Mining Publication: Geologic Factors Influencing the Gas Content of Coalbeds in Southwestern Pennsylvania
ShareCompartir
Original creation date: January 1988
A Bureau of Mines geologic study of Pennsylvanian and Permian coalbeds in southwestern Pennsylvania was undertaken to determine the effects of coalbed geology and petrology on in situ coalbed gas contents. Data were obtained from 18 coreholes from parts of four 7.5 ft quadrangles in southwestern Washington and northwestern Greene Counties, and from a single corehole in Westmoreland County. A total of 88 samples from 24 coalbeds were collected for direct-method testing to determine gas content. The samples were also analyzed for petrographic composition, chemical composition, and vitrinite reflectance values. Corehole information was used to generate isopach maps and geologic cross sections useful in data interpretation. Results of the investigation show that coalbed gas content is related to vitrinite reflectance, but not to petrographic composition. Gas contents are also influenced by other geologic factors such as roof rock lithology and competency, and location with respect to local fold structure.
Authors: JP Ulery
Report of Investigations - January 1988
NIOSHTIC2 Number: 10006200
U.S. Department of the Interior, Bureau of Mines. Report of Investigations 9195, NTIS No. PB90-270109, 1988; :1-26
See Also
- Geologic Factors Causing Roof Instability and Methane Emission Problems: The Lower Kittanning Coalbed, Cambria County, Pa
- Investigation of Methane Occurrence and Outbursts in the Cote Blanche Domal Salt Mine, Louisiana
- Measuring the Gas Content of Coal: A Review
- Methane and Dust Control by Water Infusion: Pittsburgh Coalbed (Fairview, W. Va.)
- Methane Content and Geology of the Hartshorne Coalbed in Haskell and Le Flore Counties, Okla.
- Methane Diffusion Parameters for Sized Coal Particles: A Measuring Apparatus and Some Preliminary Results
- Methane Emissions from Gassy Coals in Storage Silos
- Removing Methane (Degasification) from the Pocahontas No. 4 Coalbed in Southern West Virginia
- Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
- Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
- Content source: National Institute for Occupational Safety and Health, Mining Program