US 12,221,578 B2
Methods for completing a wellbore using high density brine containing colloidal particles
Hui Zhang, Sugar Land, TX (US); Xia Wei, Houston, TX (US); Brandi Katherine Price Hoelscher, Houston, TX (US); and Steven Young, Cypress, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Oct. 12, 2022, as Appl. No. 18/045,999.
Application 18/045,999 is a division of application No. 15/578,652, abandoned, previously published as PCT/US2016/034758, filed on May 27, 2016.
Claims priority of provisional application 62/168,805, filed on May 30, 2015.
Prior Publication US 2023/0072927 A1, Mar. 9, 2023
Int. Cl. C09K 8/05 (2006.01); C09K 8/04 (2006.01); C09K 8/36 (2006.01); C09K 8/504 (2006.01); C09K 8/84 (2006.01); C09K 8/92 (2006.01)
CPC C09K 8/05 (2013.01) [C09K 8/04 (2013.01); C09K 8/36 (2013.01); C09K 8/5045 (2013.01); C09K 8/845 (2013.01); C09K 8/92 (2013.01); C09K 2208/10 (2013.01)] 17 Claims
 
1. A method for completing a wellbore, the method comprising:
pumping a wellbore fluid into the wellbore, the wellbore fluid comprising:
an aqueous base fluid comprising a brine;
a plurality of nanoparticles suspended in the aqueous base fluid, wherein the nanoparticles are present in the wellbore fluid in an amount of 30 wt % to 60 wt % of the total weight of the wellbore fluid;
polyvinylpyrrolidone in an amount of 0.5 to 1.5 v % of the total weight of the wellbore fluid to lower a true crystallization temperature of the wellbore fluid;
a polymer viscosifier; and
bridging solid particles having an average size greater than or equal to about 1 μm; and
performing at least one completion operation while the wellbore fluid is in the wellbore.