Abstract: In a method for producing hydrocarbon gas from aquifers which contain gas in water solution, water is produced from wells distributed through the aquifer and solution gases are recovered from the produced water. The aquifer pressure declines as production continues; gas comes out of water solution and a gas phase saturation builds up in the aquifer. When gas saturation exceeds a critical value, gas in gaseous phase flows through the aquifer rock to the producing wells and the ratio of total gas to total water produced increases substantially.

Abstract: In a method for recovering more gas from natural water drive gas reservoirs than is recovered using present methods, large volumes of water are produced from the reservoir, and/or from the aquifer adjacent to the reservoir to reduce reservoir pressure. Residual gas after water displacement is thereby left in the reservoir at a lower pressure than it would have been had such water not been produced. Since the quantity of gas, in cubic feet corrected to standard pressure and temperature conditions, left in the reservoir at depletion is a direct function of pressure, use of the this method results in increased gas recovery.

Abstract: A method for producing geothermal energy and minerals from subterranean high temperature and high salinity water reservoirs by injecting low salinity water at ambient surface temperature into the reservoir through a well bore, allowing the injected water to become heated in the reservoir and then producing water through the well bore to the surface for use as a source of energy and, optionally, minerals. Simultaneously with the employment of certain wells for injection-production cycles, other wells may be employed predominantly for injection of water to displace heat and in-situ well brines to well bores which produce such water and brines to the surface for utilization of their heat energy and dissolved minerals.