US 11,952,532 B2
Sago-based formulations for gel applications including conformance control and water shutoffs
Ziyad Kaidar, Dhahran (SA); Abdulkareem Alsofi, Dhahran (SA); and Amer Alanazi, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jun. 5, 2020, as Appl. No. 16/894,100.
Prior Publication US 2021/0380866 A1, Dec. 9, 2021
Int. Cl. E21B 33/138 (2006.01); C09K 8/514 (2006.01); C09K 8/516 (2006.01); C09K 8/588 (2006.01)
CPC C09K 8/514 (2013.01) [C09K 8/516 (2013.01); C09K 8/588 (2013.01); E21B 33/138 (2013.01)] 11 Claims
 
1. A profile modification fluid consisting essentially of:
an aqueous base fluid,
wherein the aqueous base fluid comprises water and one or more salts; and
a sago biopolymer gelant,
wherein the profile modification fluid comprises the sago biopolymer gelant in an amount in the range from 60,000 ppm to 90,000 ppm, and
wherein the aqueous base fluid comprises from 50,000 to 70,000 ppm total dissolved salts, and
wherein the sago biopolymer gelant comprises an extract of a tropical palm, wherein the extract comprises natural sago biopolymer and natural components from the tropical palm, wherein the natural sago biopolymers is sago starch, and wherein the natural components are selected from the group consisting of sago protein, sago fat, sago fiber, and combinations thereof.