US 11,746,275 B2
Inhibitive divalent wellbore fluids, methods of providing said fluids, and uses thereof
Justin Linscombe, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by M-I L.L.C., Houston, TX (US)
Filed on May 25, 2020, as Appl. No. 16/882,681.
Claims priority of provisional application 62/852,310, filed on May 24, 2019.
Prior Publication US 2020/0369938 A1, Nov. 26, 2020
Int. Cl. C09K 8/08 (2006.01); C09K 8/05 (2006.01)
CPC C09K 8/05 (2013.01) [C09K 8/08 (2013.01); C09K 2208/12 (2013.01); C09K 2208/34 (2013.01)] 16 Claims
 
1. A wellbore fluid comprising:
an aqueous fluid;
a primary viscosifier comprising a starch derivative;
a stabilizer agent; and
a lubricant,
wherein the aqueous fluid is an inhibitive divalent fluid; further comprising a secondary viscosifier present in the wellbore fluid at a concentration from about 0.5 to about 7 kg/m3; wherein the stabilizer agent is a blend of polymeric alkaline materials wherein the wellbore fluid is a biopolymer-free fluid; and wherein the secondary viscosifier comprises a magnesium compound.