US 12,480,032 B2
Wellbore stability compositions comprising nanoparticles
Jay Deville, Houston, TX (US); Preston May, Houston, TX (US); Jeffrey J. Miller, Houston, TX (US); and William W. Shumway, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Dec. 21, 2021, as Appl. No. 17/557,950.
Prior Publication US 2023/0203361 A1, Jun. 29, 2023
Int. Cl. C09K 8/504 (2006.01); C09K 8/508 (2006.01); C09K 8/516 (2006.01)
CPC C09K 8/5045 (2013.01) [C09K 8/5083 (2013.01); C09K 8/516 (2013.01); C09K 2208/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
providing a treatment fluid comprising an aqueous base fluid, a nanoparticle additive, a polyanionic cellulose, a bridging agent, a shale inhibitor, xanthan gum, and a salt, wherein the nanoparticle additive is present in the treatment fluid in an amount of about 5 lb/bbl, and wherein the polyanionic cellulose is present in an amount of about 2.5 lb/bbl of the treatment fluid;
introducing the treatment fluid into at least a portion of a subterranean formation to contact at least a portion of the subterranean formation; and
allowing the nanoparticle additive and polyanionic cellulose to reduce a pore pressure transmission,
wherein the nanoparticle additive comprises a nanocomposite comprising a core and a shell,
wherein the core comprises silica, and
wherein the shell comprises a crosslinked copolymer shell comprising a copolymer of 2-acryloylamino-2-methylpropane-1-sulfonic acid (AMPSA) and acrylamide.