Mining Publication: Improved Methods for Monitoring Production From Vertical Degasification Wells
Original creation date: January 1978
Authors: SW Lambert, MA Trevits
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. Results indicate that the quality of data gathered from such wells can be improved greatly if potential problems are anticipated and prevented in the early stages of well production. Major water-monitoring problems include solids buildup, freezing, the presence of gas in surface waterlines, and improper pumping interval settings. Such problems may be avoided by incorporating in the original well design waterline filters, sand screens, separator tanks, and systems to automatically control pumping intervals. Problems related to measurement of coalbed gas flow include large quantities of water vapor contained in the gas, especially during winter months; freezing and subsequent obstruction of flow; sudden, uncontrolled release of gas pressure; and solids buildup in metering equipment. The installation of commercially available items, such as filters, separators, and insulation, and the thoughtful application of a basic knowledge of coalbed gas reservoir characteristics will prevent most production monitoring problems.
- Evaluation of Alternative Placement of Longwall Gob Gas Ventholes for Optimum Performance
- Foam Stimulation To Enhance Production From Degasification Wells in the Pittsburgh Coalbed
- Geology and Gas Content of Coalbeds in Vicinity of Bureau of Mines, Bruceton, Pa.
- Optically Powered Remote Gas Monitor
- Rapid (Grab) Sampling During Full-scale Explosions - Microscopic and Analytical Evaluation
- Remote Gob Gas Venthole Monitoring and Cellular Telephone-Based Real-Time Data Transmission System
- Remote Monitoring of Mine Seismicity and Earthquakes Using Radio Telemetry, Computers, and the Internet
- Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
- Stability Evaluation of Active Gas Wells in Longwall Abutment Pillars
- Transport Model for Shale Gas Well Leakage Through the Surrounding Fractured Zones of a Longwall Mine