CPC E21B 43/17 (2013.01) [C09K 8/80 (2013.01)] | 20 Claims |
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.
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