US 11,814,937 B2
Methodology for modeling electrokinetic effects and identifying carbonated water injection parameters
Moataz Abu AlSaud, Khobar (SA); Subhash Ayirala, Dhahran (SA); and Ali Yousef, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Mar. 22, 2021, as Appl. No. 17/208,195.
Prior Publication US 2022/0298901 A1, Sep. 22, 2022
Int. Cl. E21B 43/16 (2006.01); E21B 49/08 (2006.01); E21B 47/07 (2012.01)
CPC E21B 43/164 (2013.01) [E21B 47/07 (2020.05); E21B 49/0875 (2020.05); E21B 2200/20 (2020.05)] 8 Claims
OG exemplary drawing
 
1. A method for recovering hydrocarbons from a hydrocarbon-containing formation, the method comprising:
determining a pressure of the hydrocarbon-containing formation from one or both of field measurements and reservoir characterization;
determining a temperature of the hydrocarbon-containing formation from one or both of field measurements and reservoir characterization;
determining one or more properties of the formation, where the properties are selected from a group consisting of total acid number of the hydrocarbons, total base number of the hydrocarbons, rock type, and brine ionic composition;
determining a desired amount of wettability alteration of the formation;
modeling the formation using a surface complexation model based on the determined pressure, temperature, and one or more properties to output an estimated wellbore fluid composition, wherein the estimated wellbore fluid composition provides the desired amount of wettability alteration of the formation;
preparing an aqueous wellbore fluid based on the estimated wellbore fluid composition; and
injecting the aqueous wellbore fluid into a formation.