Treatment of geothermal brine sulfate-rich fluids to facilitate

Details Treatment of geothermal brine sulfate-rich fluids to facilitate Treatment of geothermal brine sulfate-rich fluids to facilitate

1983-03-23

1984-03-20

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210717, 210718, 210747, C02F 152

Patent

active

044379951

ABSTRACT:
A method for the treatment of geothermal brines to control the precipitation of silica is disclosed. A sulfate-rich liquid is introduced into geothermal brine within a production well prior to flashing or is introduced into the residual geothermal brine remaining after the brine has been flashed to produce steam. The sulfate in the liquid reacts with the barium, calcium, and/or lead salts within the brine to produce a colloidal suspension which serves to accelerate precipitation of silica from the brine and to adsorb the precipitated silica particles. The colloidal suspension with its adsorbed silica particles is then removed from the brine by conventional gravimetric or filtration methods.
The method of the invention substantially reduces the deposition of silica in wellbores and in energy extraction equipment and facilitates removal of the silica from the brine. The method further reduces the deposition of silica in injection wells wherein the silica cleansed brine is discharged.

REFERENCES:
patent: 3951794 (1976-04-01), Swearingen
patent: 4016075 (1977-04-01), Wilkins
patent: 4302328 (1981-11-01), Van Note
patent: 4370858 (1983-02-01), Awerbuch et al.
patent: 4405463 (1983-09-01), Tost et al.

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