Measurement of Dynamic Reservoir: Reservoir Conditions. Technical Progress Report, June 1984-March 1985

摘要

Progress report on the drainage borehole DHM-7 at the Oak Grove Test Site for the period June 1984 through March 1985 is presented. Gas and water production from Borehole DHM-7 have been monitored following its hydraulic stimulation in May 1984. Gas production has been poor, averaging 7600 cubic feet per day (cfd). This poor production has, in part, been the result of poor downhole dewatering-pump performance. The sucker-rod-type pump, which was installed following the stimulation, would not operate for extended periods when positioned below the Blue Creek coal seam. In this position, it would quickly plug with sand and/or coal fines. Successful sucker-rod-pump operation was only obtained when the pump was installed above the coal seam. This resulted in a constant hydrostatic head on the seam restricting gas flow. To overcome this problem, a progressing cavity pump has been installed and positioned below the coal seam to remove the hydrostatic head from the coal seam. Gas and water production will be monitored until late 1985, when mining is scheduled to intercept the bottom of the hole. 1 fig., 1 tab. (ERA citation 10:026691)