US 11,767,464 B2
Consolidation and wellbore strength enhancement with CaCO3 precipitation
Xiangnan Ye, Cypress, TX (US); Cato R. McDaniel, Montgomery, TX (US); and Dale E. Jamison, Humble, TX (US)
Assigned to HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US)
Filed by HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US)
Filed on May 3, 2021, as Appl. No. 17/306,793.
Application 17/306,793 is a continuation of application No. 16/338,074, abandoned, previously published as PCT/US2016/058203, filed on Oct. 21, 2016.
Prior Publication US 2021/0253939 A1, Aug. 19, 2021
Int. Cl. E21B 33/138 (2006.01); C09K 8/57 (2006.01); C09K 8/72 (2006.01); E21B 21/00 (2006.01); E21B 37/00 (2006.01)
CPC C09K 8/572 (2013.01) [C09K 8/72 (2013.01); E21B 21/003 (2013.01); E21B 33/138 (2013.01); E21B 37/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for stabilizing a wellbore during drilling in a subterranean formation, the method comprising:
pausing a drilling operation;
introducing a first fluid into a rock matrix of a formation, wherein the first fluid comprises a first water soluble salt and a first carrier;
introducing a second fluid into the rock matrix of the formation, wherein the second fluid comprises a second water soluble salt and a second carrier, and wherein the first fluid and second fluid produce a solid precipitate upon contact, wherein the solid precipitate comprises at least one of calcium carbonate, calcium sulfate, calcium phosphate, or calcium hydroxide;
allowing the solid precipitate to consolidate to form in-situ in the rock matrix of the formation and enhance a strength of the rock matrix of the formation; and
continuing the drilling operation.