US 11,773,705 B1
Changing calcium carbonate particle size with starch for reservoir fluids
Mahesh Vijay Biyani, Pune (IN); Sunita S. Kadam, Pune (IN); Sohini Bose, Houston, TX (US); Alexandra Clare Morrison, Houston, TX (US); Sudarshana Mukherjee, Pune (IN); and Hui Zhou, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 30, 2022, as Appl. No. 17/957,055.
Int. Cl. E21B 43/17 (2006.01); C09K 8/80 (2006.01)
CPC E21B 43/17 (2013.01) [C09K 8/80 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of drilling a wellbore for an injector well penetrating a subterranean formation, the method comprising:
during drilling operations, circulating in the wellbore a first aqueous drilling fluid composition comprising a modified starch and a calcium carbonate wherein the calcium carbonate has a first predetermined particle size;
during the circulating, measuring one or more first aqueous drilling fluid composition parameters, one or more subterranean formation parameters, or both to create a set of measured parameters; and
during the circulating, responsive to one or more parameters of the set of measured parameters, changing the calcium carbonate with another calcium carbonate of a second predetermined particle size different from the first predetermined particle size of the first aqueous drilling fluid composition to obtain a second aqueous drilling fluid composition,
wherein the first predetermined particle size and second predetermined particle size are, independently, a d50 particle size of about 1.0 μm to about 150 μm.