Production of hot brines from liquid-dominated geothermal wells

Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Dissolving or chemical reaction

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166314, 299 7, E21B 4300, E21B 4328

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active

040171205

ABSTRACT:
Hot brines containing dissolved gases are produced from liquid-dominated geothermal wells by utilizing lift gases of essentially the same composition as said dissolved gases. The lift gas is separated from the produced brine and recycled. Heat is abstracted from the separated brine, which may be returned to the aquifer, processed for its mineral content or discarded. The gas lift is carried out under temperature and pressure conditions such that precipitation of minerals from the brine does not occur in the well bore. The problems which would result from the use of oxygen-containing and/or brine-soluble inert gases for the lifting operation are avoided. The problems attendant upon production of hot brines by pumping are also avoided.

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