Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives

Details

• Personal Author:
  Karacan, C. Özgen
• Description:
  The methane emission rate into an underground mine environment from overburden strata during longwall mining is impacted by reservoir and geomechanical characteristics of the coal measure rocks in the overlying strata, as well as the presence of any coal seam. The reservoir characteristics and how they change during mining potentially affect the performance of gob gas ventholes, which consequently impacts the efficiency of methane control in the mining environment. This study presents reservoir and elastic properties of coal measure rocks in the Lower Monongahela Group in Greene County, southwestern Pennsylvania, of the Northern Appalachian Basin. Since the source of methane in this region from underground mining is located between the Sewickley coal and the Pittsburgh coal, a specific emphasis was given to this interval. Core analyses were performed in the laboratory to determine rock porosity and permeability. Geophysical logging data (gamma, density, sonic) obtained from two exploration boreholes were used for evaluating formation boundaries, shale contents, log porosities, and geomechanical properties of formations. Permeability was also calculated using density-log data and empirical equations and compared with laboratory measurements and slug tests performed in isolated intervals of boreholes. The results presented in this study can be used as data sources for reservoir studies related to the production and control of methane. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution Air Pollution, Indoor Coal Coal Mining Environmental Monitoring Hazardous Substances Methane Mining Occupational Health Safety

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• Keywords:
  Air-contamination Air-quality Appalachian Basin Author Keywords: Reservoir Characterization Coal-gas Coal-gasification Coal-miners Coal-mining Coal-workers Exposure-assessment Exposure-methods Gas-detectors Gases Geomechanical Properties Greene County Health-hazards Mathematical-models Methane-control Methanes Monongahela Group Permeability Wellbore Logs

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• Series:
  Mining Publications
• ISSN:
  0166-5162
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  47-64
• Volume:
  78
• Issue:
  1
• NIOSHTIC Number:
  nn:20035007
• Citation:
  Int J Coal Geol 2009 Mar; 78(1):47-64
• Email:
  cok6@cdc.gov
• Federal Fiscal Year:
  2009
• NORA Priority Area:
  Mining
• Peer Reviewed:
  True
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e79192c49ad01d4f2ac61031c865fd3db2213228d0c127f2837af536c5481e5fa0bc1d9b00fbd536c6983e3214dea61fd46113b79a2e953556e2bef68db8af00
• Download URL:
  https://stacks.cdc.gov/view/cdc/227057/cdc_227057_DS1.pdf
• File Type:
  [PDF - 2.04 MB ]