	US 11,866,639 B2
	Method and material to reduce acid-carbonate reaction rate by endothermic reaction
Fakuen Frank Chang, Houston, TX (US); and Wenwen Li, Pearland, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Apr. 26, 2022, as Appl. No. 17/660,738.
Claims priority of provisional application 63/181,572, filed on Apr. 29, 2021.
Prior Publication US 2022/0348815 A1, Nov. 3, 2022
Int. Cl. C09K 8/528 (2006.01); C09K 8/92 (2006.01); C09K 23/52 (2022.01); C09K 23/18 (2022.01); C09K 8/36 (2006.01)

CPC C09K 8/528 (2013.01) [C09K 8/36 (2013.01); C09K 8/92 (2013.01); C09K 23/18 (2022.01); C09K 23/52 (2022.01)]

15 Claims

1. A well treatment fluid, comprising:

solid particles comprising one or more components selected from the group consisting of urea, ammonium nitrate, ammonium chloride, barium hydroxide, and ammonium thiocyanate; and

a carrier fluid selected from the group consisting of an aqueous polymeric fluid, an oil, and combinations thereof,

wherein the aqueous polymeric fluid comprises a polymer selected from the group consisting of guar gum, hydroxypropyl guar, carboxymethyl hydroxypropyl guar, cellulose, and polyacrylamide, wherein the polymer is crosslinked by a crosslinker selected from the group consisting of borate, titanate, and zirconate; and

wherein the oil comprises a material selected from the group consisting of diesel, mineral oil, and wax.