	US 11,939,517 B2
	Porous polyurethane for consolidation of material in subterranean formations
Wenwen Li, Pearland, TX (US); Fakuen Frank Chang, Houston, TX (US); and Feng Liang, Cypress, TX (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Apr. 7, 2022, as Appl. No. 17/715,495.
Claims priority of provisional application 63/180,978, filed on Apr. 28, 2021.
Prior Publication US 2022/0348814 A1, Nov. 3, 2022
Int. Cl. C09K 8/28 (2006.01); C09K 23/00 (2022.01); C09K 23/18 (2022.01); C09K 23/36 (2022.01); C09K 23/38 (2022.01)

CPC C09K 8/28 (2013.01) [C09K 23/018 (2022.01); C09K 23/18 (2022.01); C09K 23/36 (2022.01); C09K 23/38 (2022.01)]

8 Claims

1. A method for consolidating a subterranean formation, comprising:

injecting a water-in-oil emulsion into an unconsolidated subterranean formation, wherein the water-in-oil emulsion comprises comonomers in an oil phase to form a polyurethane resin, and a catalyst in an aqueous phase, and wherein the catalyst is added to the aqueous phase before mixing the aqueous phase into the oil phase; and

allowing the polyurethane resin to cure to form a porous polymeric network;

wherein the subterranean formation after consolidation has a permeability of from 0.010 Darcy to 10 Darcy.