US 12,104,118 B2
Advanced encapsulation for downhole water capture and improved oil recovery
Abdulaziz S. Al-Qasim, Dammam (SA); and Yuguo Wang, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Mar. 3, 2023, as Appl. No. 18/178,226.
Claims priority of provisional application 63/368,912, filed on Jul. 20, 2022.
Prior Publication US 2024/0026216 A1, Jan. 25, 2024
Int. Cl. E21B 43/16 (2006.01); C09K 8/594 (2006.01)
CPC C09K 8/594 (2013.01) 16 Claims
OG exemplary drawing
 
1. A composition comprising:
a carbon dioxide (CO2) emulsion comprising a continuous critical or supercritical CO2 phase and a discontinuous phase comprising a polyacrylate,
wherein the polyacrylate has a cationic counterion selected from the group consisting of sodium, lithium, potassium, ammonium, or combinations thereof, and
wherein the discontinuous phase is dispersed in the continuous critical or supercritical CO2 phase as droplets having an average diameter ranging from 10 to 200 nm.