US 12,366,139 B2
Systems and methods for delivering degradable polyester during gravel packing
Tint Htoo Aung, Houston, TX (US); Cedric Manzoleloua, Houston, TX (US); Balkrishna Gadiyar, Katy, TX (US); and Edward Derkach, Houston, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 18/549,981
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Mar. 9, 2022, PCT No. PCT/US2022/071046
§ 371(c)(1), (2) Date Sep. 11, 2023,
PCT Pub. No. WO2022/192880, PCT Pub. Date Sep. 15, 2022.
Claims priority of provisional application 63/201,759, filed on May 12, 2021.
Claims priority of provisional application 63/159,273, filed on Mar. 10, 2021.
Prior Publication US 2024/0151121 A1, May 9, 2024
Int. Cl. E21B 43/04 (2006.01); E21B 37/06 (2006.01)
CPC E21B 43/04 (2013.01) [E21B 37/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
drilling an interval of a wellbore with a non-aqueous wellbore fluid, wherein the interval of the wellbore traverses a subterranean formation, and wherein the non-aqueous wellbore fluid produces a filter cake in the interval of the wellbore;
gravel packing the interval of the wellbore with a gravel pack that includes a non-aqueous gravel pack carrier fluid, proppants, and degradable polyester particles, wherein at least a portion of the proppants have a specific gravity of about 2.0 and are coated with a degradable polyester coating, and wherein the degradable polyester particles are present at about 5% by weight of the proppants;
introducing a filter cake breaker fluid system into the wellbore, wherein the filter cake breaker fluid system includes a degradable polyester;
hydrolyzing the degradable polyester of the filter cake breaker fluid system to decrease the pH of the gravel pack and cause the non-aqueous gravel pack carrier fluid to revert to a water-wet state; and
degrading, using the filter cake breaker fluid system and after the non-aqueous gravel pack carrier fluid has reverted to the water-wet state, at least a portion of the filter cake.