CPC E21B 49/005 (2013.01) [C09K 8/24 (2013.01); E21B 21/01 (2013.01); E21B 47/11 (2020.05); C09K 2208/10 (2013.01)] | 20 Claims |
1. A method, comprising:
introducing a plurality of tags into a drilling fluid, each tag comprising:
a first clay nanoparticle; and
a first polymer embedded into the clay nanoparticle;
circulating the drilling fluid and tags through a well during a drilling operation that creates formation cuttings such that the tags interact with the formation cuttings, creating tagged cuttings;
collecting returned cuttings from the circulating drilling fluid at a surface of the well;
detecting the tags on the returned cuttings to identify the tagged cuttings; and
correlating the tagged cuttings with a drill depth in the well from the drilling operation.
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