US 12,378,464 B2
Methods for hydrocarbon recovery
Do Hoon Kim, Katy, TX (US); Dennis Arun Alexis, Richmond, VA (US); Varadarajan Dwarakanath, Houston, TX (US); David Espinosa, Houston, TX (US); Taimur Malik, Houston, TX (US); Logan Jackson, Norcross, GA (US); Tom Lynch, Roswell, GA (US); Ronald Robinson, Newnan, GA (US); Frances Fournier, Marietta, GA (US); Hong Yang, Atlanta, GA (US); and Sukhjit Aujla, The Woodlands, TX (US)
Assigned to CHEVRON U.S.A. INC., San Ramon, CA (US)
Filed by CHEVRON U.S.A. INC., San Ramon, CA (US)
Filed on Feb. 9, 2024, as Appl. No. 18/437,942.
Application 18/437,942 is a continuation of application No. 18/336,457, filed on Jun. 16, 2023, abandoned.
Application 18/336,457 is a continuation of application No. 17/981,733, filed on Nov. 7, 2022, abandoned.
Application 17/981,733 is a continuation of application No. 17/395,933, filed on Aug. 6, 2021, abandoned.
Application 17/395,933 is a continuation of application No. 16/851,875, filed on Apr. 17, 2020, granted, now 11,084,973, issued on Aug. 10, 2021.
Application 16/851,875 is a continuation of application No. 15/372,168, filed on Dec. 7, 2016, granted, now 10,626,320, issued on Apr. 21, 2020.
Claims priority of provisional application 62/264,776, filed on Dec. 8, 2015.
Prior Publication US 2024/0271031 A1, Aug. 15, 2024
Int. Cl. C09K 8/588 (2006.01); C09K 8/584 (2006.01); E21B 43/20 (2006.01)
CPC C09K 8/588 (2013.01) [C09K 8/584 (2013.01); E21B 43/20 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for preparing an inverted polymer solution comprising:
providing a liquid polymer (LP) composition comprising:
one or more water soluble (co) polymers;
one or more hydrophobic liquids;
one or more emulsifier surfactants; and
one or more inverting surfactants;
inverting the LP composition in an aqueous fluid to provide an inverted polymer solution having a concentration of water soluble (co) polymer of from 50 to 15,000 ppm; and
performing an injectivity test on the inverted polymer solution in which two pore volumes of the inverted polymer solution are injected into a Bentheimer sandstone core at a flow rate of 0.5 ml/min at a temperature of 31° C., and a pressure drop for the inverted polymer solution reaches a steadystate; and
wherein the inverted polymer solution is used in an enhanced oil recovery (EOR) operation.