US 12,215,273 B2
High density brine internal phase
Jay Paul Deville, Spring, TX (US); Hui Zhou, The Woodlands, TX (US); Chesnee Lae Davis, Spring, TX (US); and Catherine Martin Santos, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Apr. 5, 2023, as Appl. No. 18/131,329.
Application 18/131,329 is a division of application No. 16/961,892, granted, now 11,649,391, previously published as PCT/US2018/067711, filed on Dec. 27, 2018.
Claims priority of provisional application 62/646,794, filed on Mar. 22, 2018.
Prior Publication US 2023/0242803 A1, Aug. 3, 2023
Int. Cl. C09K 8/36 (2006.01); E21B 21/00 (2006.01)
CPC C09K 8/36 (2013.01) [E21B 21/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oil-based treatment fluid for use in subterranean operations, the oil-based treatment fluid comprising:
an invert emulsion comprising an aqueous internal phase and an oil external phase,
wherein the aqueous internal phase is solids free and comprises a two-salt brine and a true crystallization temperature reduction additive,
wherein the true crystallization temperature reduction additive comprises a sugar alcohol, a sugar acid, or any combination thereof,
wherein the two-salt brine comprises a bromide and a nitrate,
wherein no additional salts are in the aqueous internal phase,
wherein the two-salt brine has a density of about 14.2 lbs/gal to about 17 lbs/gal;
wherein the two-salt brine has a first true crystallization temperature without inclusion of the true crystallization temperature reduction additive; and
wherein the two-salt brine has a second true crystallization temperature with the true crystallization temperature reduction additive that is lower than the first true crystallization temperature.