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NIOSH Gas Well Stability Research – Status and Significant Findings

Public Domain


Details

  • Personal Author:
  • Description:
    To provide critical scientific data and engineering guidelines to federal and state regulatory agencies as well as the coal and gas industries, the National Institute for Occupational Safety and Health (NIOSH) initiated a Gas Well Stability Research Program in 2016. This paper summarizes the critical scientific data acquisition, interpretation, and modeling by NIOSH regarding the stability of unconventional shale gas wells influenced by longwall mining. Currently, NIOSH is the only organization in the U.S. conducting such fundamental and impact-oriented research, which receives input and collaborations from MSHA, PADEP, WVDMS, OHDNR, the coal industry, and the gas industry. Results from the NIOSH field instrumentation programs - which include surface, subsurface, and underground instrumentation - and the parallel three-dimensional numerical modeling programs indicate that, under shallow and medium covers, the measured horizontal displacements within the abutment pillar are one order of magnitude higher than those measured under deep cover. Casing couplers are found to play an important role in longwall-induced casing deformations. Cementing alternatives are found to have significant impact on longwall-induced casing stresses and deformations. Measured 60-arm caliper logging results are in good agreement with three-dimensional computer simulation results. Engineering guidelines on longwall-induced deformations, casing and cementing alternatives, gas well setback distances, as well as risk assessment strategy are proposed. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Mining Publications
  • ISBN:
    9781713845089
  • Publisher:
    Society for Mining, Metallurgy & Exploration (SME)
  • Document Type:
    Text
  • Genre:
    Proceedings
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    PMRD - Pittsburgh Mining Research Division
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    190-194
  • NIOSHTIC Number:
    nn:20065260
  • Citation:
    MineXchange: 2022 SME Annual Conference and Expo, February 27-March 2, 2022, Salt Lake City, Utah, preprint 22-035. Englewood, CO: Society for Mining, Metallurgy & Exploration, 2022 Feb; :190-194
  • Contact Point Address:
    D. W. H. Su, CDC NIOSH, Bruceton, PA, United States
  • Federal Fiscal Year:
    2022
  • NORA Priority Area:
    Mining
  • Peer Reviewed:
    False
  • Source Full Name:
    MineXchange: 2022 SME Annual Conference and Expo, February 27-March 2, 2022, Salt Lake City, Utah, preprint 22-035
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:488c07f3e2c642313aff3b80347bcfad4e5e3dd6a581265dad3ccc3b869dff5132e8991c996295376a8f97b608832cf51fc7990e8f806a0748916fd66118a621
  • Download URL:
  • File Type:
    Filetype[PDF - 857.60 KB ]
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