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Geologic factors influencing the gas content of coalbeds in southwestern Pennsylvania.

Authors
Ulery-JP
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9195, 1988 Jan; :1-26
NIOSHTIC No.
10006200
Abstract
A Bureau of Mines geologic study of Pennsylvanian and Permian coalbeds in southwestern Pennsylania 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.
Keywords
Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls
CAS No.
74-82-8
Publication Date
19880101
Document Type
IH; Report of Investigations
Fiscal Year
1988
NTIS Accession No.
PB90-270109
NTIS Price
A03
Identifying No.
RI-9195
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9195
State
PA; WA
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