Secondary Gas Recovery From a Watered-Out Reservoir

Abstract

A field test of the depressuring process used to remobil ize and produce trapped gas from a watered-out reservoir is described.Actual performance is compared with predictions at two different points in time showing the modifications to the reservoir-aquifer simulation model that were required to obtain pressure matches.Increased water production rates, justified by the improved simulation model, led to the product ion of secondary recovery gas and, in turn, to the conclusion that the depressuring process is working.

Feasibility Studies of Waterflooding Gas-Condensate Reservoirs

“…A large number of gas reservoirs with strong underlying aquifers have been successfully developed, however, and have given moderately high gas recoveries, [6][7][8][9] suggesting that at least some of the trapped gas could be remobilized during a fmal period of accelerated depressurization. Boyd et at.…”