ENHANCED RECOVERY FROM WATER-DRIVE GAS RESERVOIRS
Journal Title: UNKNOWN - Year 1990, Vol 2, Issue 1
Abstract
Ultimate recovery from water—drive gas reservoirs is governed primarily by the reservoir heterogeneity, residual gas saturation behind the water front, and by relatively high—pressure free gas abandoned updip of the highest perforation. Typical recovery from these reservoirs ranges between 35 and 75% of gas in place. Gas recovery can be enhanced using the »co — production« technique, in this process, as the downdip wells begin to water out, they are converted to high-rate water producers while the updip gas wells maintain gas production. If enough water is produced, the water influx can be halted or at least slowed down, allowing updip wells to deplete the free gas zone to lower pressure. Also, bypassed gas may regain mobility as pressure is lowered in the water-swept zone. Material balance calculations and numerical simulation arc used to support the technical feasibility of co—production. The technical as well as the economic feasibility is demonstrated using actual reservoirs.
Authors and Affiliations
Zaki Bassiouni
Keywords
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