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Foam stimulation for enhanced recovery from coal-gas wells.

Authors
Steidl-PF; Lambert-SW
Source
Proc Aapg-sepm Ann Conv Oklahoma City Oklahoma, 1978 Apr; :115
Link
NIOSHTIC No.
10000705
Abstract
Large quantities of methane gas which now are vented from mines could be produced from coal-gas wells. Eight of these coal-gas wells have been completed in the Pittsburgh coal bed at the Emerald Mine near Waynesburg, Pennsylvania. The Bureau of Mines has provided foam stimulation for five of these wells. The foam treatments used an average of 8,200 gal of water, 40 gal of foaming agent, 10,900 lb of 10/20- or 20/40-mesh proppant sand, and 300,000 cu ft of nitrogen. These treatments had an average injection pressure of 1,376 psig, at an average rate of 12 bbl of foam per minute, and 1/4 to 1 lb of sand per gal of foam. Production from two of the wells, which are dewatered, has averaged over 100,000 cu ft/day for several months. Additional wells were completed in the Mary Lee coal bed and show even more promising results. These projects should show that degasification in advance of mining is feasible and economical.
Keywords
Mining-industry; Mine-gases; Gases; Methanes; Coal-gas
CAS No.
74-82-8
Publication Date
19780401
Document Type
OP
Fiscal Year
1978
NTIS Accession No.
NTIS Price
Identifying No.
OP 28-78
NIOSH Division
PRC
Source Name
Proc. Aapg-sepm Ann. Conv., Oklahoma City, Oklahoma, April 9-12, 1978, PP. 115
State
OK; PA
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