Degasification of coal seams via vertical boreholes: a field and computer simulation study

Book · Tue Jan 01 04:00:00 EST 1980

OSTI ID:6161007

Chase, R W

Four vertical boreholes were drilled into Pennsylvania coal seams specifically for the purpose of producing the natural gas intimately associated with the coal. One well was completed in the anthracite coal region of northeast Pennsylvania. Three wells were completed in the bituminous coal region of southwest Pennsylvania. One methane drainage well was cased and perforated in the Pittsburgh coal, and stimulated with a foam fracturing treatment. The second degasification well was completed open-hole in the Pittsburgh coal, and stimulated with a foam frac treatment identical to that used in the first well. The third well also was completed open-hole in the Pittsburgh coal seam. The well is being used as an observation well to study the natural drainage characteristics of the coal. Core samples were taken from several coal seams during the drilling of the 4 wells. A 2-phase, radial, cross-sectional numerical reservoir simulation model was developed to study the flow of gas and water in coal seams.

• OSTI ID: 6161007
• Country of Publication: United States
• Language: English

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COAL DEPOSITS
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