E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/00 (2006.01) B09C 1/00 (2006.01) C02F 1/28 (2006.01) C02F 9/00 (2006.01) E21B 43/267 (2006.01) E21B 43/38 (2006.01) G21F 9/00 (2006.01) G21F 9/12 (2006.01)
Patent
CA 2133707
2133707 9321112 PCTABS00027 A method is provided for reducing the concentration of radioactive materials or other trace contaminants in fluids withdrawn from subterranean reservoirs. The method involves deposition of sorbent solids within the reservoir matrix surrounding a production well to act as an in-situ filter for dissolved radionuclides or other contaminants present in reservoir pore waters. For this purpose, the sorbent solid is either a) precipitated within the reservoir matrix by the reaction of two or more carrier solutions or b) directly introduced into the reservoir as a solid component of a solid-liquid slurry using high-pressure injection techniques. Thereafter, fluids produced by the well contain significantly lower concentrations of contaminants which are removed from the inflowing reservoir fluids by means of ion exchange, adsorption, chelation, chemisorption, or coprecipitation with the in-situ filter medium.
Clifford Dennis A.
Connor John A.
King Philip
Groundwater Services Inc.
Kirby Eades Gale Baker
LandOfFree
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