US 11,952,533 B2
Filter cake removal compositions and methods of making and using same
Bhau Anantha Kuchik, Pune (IN); V. Ramireddy Devarapalli, Pune (IN); and Sunita S. Kadam, Pune (IN)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Nov. 17, 2021, as Appl. No. 17/528,610.
Prior Publication US 2023/0151262 A1, May 18, 2023
Int. Cl. C09K 8/52 (2006.01); C09K 8/035 (2006.01)
CPC C09K 8/52 (2013.01) [C09K 8/035 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of dissolving a filtercake within a wellbore comprising:
introducing to a wellbore a breaker solution comprising (i) an acid precursor, (ii) an accelerating agent wherein the accelerating agent comprises ZnSO4, or a hydrates thereof, and (iii) an aqueous fluid; and
contacting the filtercake with the breaker solution,
wherein contacting occurs in the wellbore at a temperature ranging from about 15° C. to about 120° C.; wherein the filtercake comprises calcium carbonate and wherein a rate of acid precursor hydrolysis is increased by from about 5 times to about 30 times the rate of acid precursor hydrolysis observed in the absence of an accelerating agent.