US 11,655,409 B2
Forming drilling fluid from produced water
Fahd Ibrahim AlGhunaimi, Dhahran (SA); Young Chul Choi, Dhahran (SA); Regis Didier Alain Vilagines, Dhahran (SA); and Khalid A. Al-Harbi, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Sep. 23, 2020, as Appl. No. 17/30,128.
Prior Publication US 2022/0089931 A1, Mar. 24, 2022
Int. Cl. C09K 8/05 (2006.01); B01J 49/57 (2017.01); B01J 41/04 (2017.01); B01J 41/12 (2017.01); B01J 47/06 (2006.01); C02F 1/42 (2006.01); E21B 21/06 (2006.01); E21B 43/34 (2006.01); C02F 103/10 (2006.01)
CPC C09K 8/05 (2013.01) [B01J 41/04 (2013.01); B01J 41/12 (2013.01); B01J 47/06 (2013.01); B01J 49/57 (2017.01); C02F 1/42 (2013.01); E21B 21/06 (2013.01); E21B 43/34 (2013.01); C02F 2001/422 (2013.01); C02F 2103/10 (2013.01); C02F 2303/16 (2013.01)] 32 Claims
OG exemplary drawing
 
19. A method of generating calcium bromide in solution in water from produced water for a drilling fluid, the method comprising:
receiving produced water comprising bromide ions discharged from a subterranean formation;
subjecting in a vessel the produced water to ion exchange comprising sorbing bromide ions from the produced water onto ion-exchange resin disposed in the vessel and desorbing chloride ions from the ion-exchange resin into the produced water in the vessel, wherein the ion-exchange resin comprises bromine-specific ion-exchange resin;
discharging the produced water from the vessel without the bromide ions sorbed onto the ion-exchange resin;
providing regenerant comprising calcium chloride in water to the vessel;
regenerating via the regenerant in the vessel the ion-exchange resin comprising desorbing bromide ions from the ion-exchange resin into the water in the vessel and sorbing chloride ions from the water in the vessel onto the ion-exchange resin; and
giving the calcium bromide in solution in the water via the regenerating and as discharged from the vessel, the calcium bromide comprising calcium ions from the calcium chloride and the bromide ions as desorbed from the ion-exchange resin into the water in the vessel.