Results 1 - 10 of 11

• Development of Engineering Guidelines for Shale Gas Wells Influenced by Longwall Mining
  9/18/2020 - Research projects
  A project to address the lack of information on longwall-induced subsurface strata deformations and stresses and their effect on shale gas well casings by conducting detailed analysis and instrumentation on unconventional shale gas wells.
• Stability Evaluation of Active Gas Wells in Longwall Abutment Pillars
  9/16/2020 - Research projects
  A project to evaluate and quantify subsurface overburden deformations in longwall abutment pillars under shallow overburden depths, and to employ field instrumentation results and 3D numerical modeling to identify critical parameters.
• Transport Model for Shale Gas Well Leakage Through the Surrounding Fractured Zones of a Longwall Mine
  9/1/2020 - Peer reviewed journal articles
  An article presenting an analytical model of gas transport through fractures in a low permeable stratum.
• Cross Formational Flow of Water into Coalbed Methane Reservoirs: Controls on Relative Permeability Curve Shape and Production Profile
  3/1/2017 - Peer reviewed journal articles
  This article by NIOSH investigates the impact of water flow from an external source into coalbed on production performance and also on reservoir variables.
• Water Well Safety Bits: Health And Safety Information For The Water Well Industry
  9/1/2005 - Information Circulars
  Water well drillers are exposed to high levels of noise while working. Drillers and owners can work together to prevent noise-induced hearing loss, and measures can be taken to reduce exposure to hazardous noise.
• Modeling the Effects of Longwall Mining on the Ground Water System
  1/1/1995 - Reports of Investigations
  A hydrologic-subsidence investigation was performed to evaluate the effects of longwall mining on the local groundwater regime through field monitoring and numerical modeling.
• Foam Stimulation To Enhance Production From Degasification Wells in the Pittsburgh Coalbed
  1/1/1978 - Reports of Investigations
  Seven degasification wells have been completed in the Pittsburgh coalbed at the New Emerald Mine near Waynesburg, Pennsylvania. The Bureau of Mines performed stimulation treatments on five of the wells.
• Methane Drainage: Experience With Hydraulic Stimulation Through Slotted Casing
  1/1/1978 - Reports of Investigations
  The Bureau of Mines examined the wellbore of a vertical gas drainage well in the Mary Lee coalbed to determine the results of specific completion procedures in coal. A jet-slotting tool was used to cut four vertical slots through the casing about 1 ft b...
• Improved Methods for Monitoring Production From Vertical Degasification Wells
  1/1/1978 - Reports of Investigations
  In this Bureau of Mines investigation, production was monitored for 1 year at over 30 coalbed gas-drainage boreholes located in Alabama, Pennsylvania, and West Virginia.
• Demonstration of Safety Plugging of Oil Wells Penetrating Appalachian Coal Mines
  7/1/1972 - Technical Progress Reports
  An oil well penetrating the Pittsburgh bituminous coalbed in northern West Virginia was plugged and safely mined through 3 months later. Effectiveness of the plugging in preventing reservoir gas from entering the mine through the well hole was verified ...