US 12,202,755 B2
Segregation and treatment of waste water streams for enhanced oil recovery
Mohamed Ahmed Soliman, Ras Tanura (SA); Abdulaziz Y. Ammar, Dammam (SA); Ahmed Bu Ali, Dammam (SA); Seung-Hak Choi, Dhahran (SA); and Hasan Al Abdulgader, Dammam (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Dec. 20, 2022, as Appl. No. 18/068,997.
Prior Publication US 2024/0199462 A1, Jun. 20, 2024
Int. Cl. E21B 43/20 (2006.01); B01D 61/00 (2006.01); C02F 1/04 (2023.01); C02F 1/44 (2023.01); C02F 1/463 (2023.01); C02F 1/467 (2023.01); C02F 1/78 (2023.01); C02F 9/00 (2023.01); C02F 103/10 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 61/0022 (2022.08); B01D 61/0023 (2022.08); B01D 61/005 (2013.01); E21B 43/20 (2013.01); C02F 1/04 (2013.01); C02F 1/445 (2013.01); C02F 1/463 (2013.01); C02F 1/4672 (2013.01); C02F 1/78 (2013.01); C02F 2103/10 (2013.01); C02F 2209/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
generating concentrated solution by treating, using a forward osmosis process, waste water of one or more gas streams from a gas plant associated with one or more gas wells, wherein draw solution of the forward osmosis process comprises produced water from one or more crude oil production traps, and the waste water contains kinetic hydrate inhibitor (KHI);
generating oxidized solution by treating, using an oxidation process, the concentrated solution to decompose the KHI in the waste water, wherein the oxidation process comprises a combination of an electrocoagulation process and an electrochemical oxidation process, the electrocoagulation process comprises a plurality of electrocoagulation reactions comprising a plurality of anode side reactions and a plurality of cathode side reactions, and the electrochemical oxidation process comprises at least one of direct oxidation and indirect oxidation; and
injecting the oxidized solution into an oil reservoir through a water injection well for enhanced oil recovery (EOR).