▎ 摘　　要

NOVELTY - A fluid composition comprises: non-aqueous base fluid selected from oil-based fluid, brine-in-oil emulsion, brine-in-non-aqueous fluid emulsion, and/or water-in-oil emulsion, and nanoparticles selected from graphene, graphene platelets, graphene oxide, nanorods, nanoplatelets, nanoclays, nano-titanium oxide platelets, and/or nano-oxides, where the fluid composition has at least one property selected from dielectric constant of 5-10000, and electrical conductivity of 1x 10-6 to 1 S/m. USE - As a fluid composition, useful for modifying electrical conductivity and dielectric constant of a fluid (claimed), and for improving drilling fluids, completion fluids, production fluids, and servicing fluids, which are used in drilling, completing, producing, and remediating subterranean reservoirs and formations. ADVANTAGE - The nanoparticle blend improves performance of a high-frequency downhole tool of the composition as compared to an otherwise identical fluid but in absent of the nanoparticle blend. The fluid composition have relative dielectric constant of 5-10000, and electrical conductivity of 1x 10-6 to 1 S/m. DETAILED DESCRIPTION - A fluid composition comprises: either non-aqueous base fluid selected from oil-based fluid, brine-in-oil emulsion, brine-in-non-aqueous fluid emulsion, and/or water-in-oil emulsion, and nanoparticles selected from graphene, graphene platelets, graphene oxide, nanorods, nanoplatelets, nanoclays, nano-titanium oxide platelets, and/or nano-oxides, where the fluid composition has at least one property selected from dielectric constant of 5-10000, and electrical conductivity of 1x 10-6 to 1 S/m; or a base fluid selected from brine-in-oil emulsion, brine-in-non-aqueous fluid emulsion, and/or water-in-oil-emulsion; nanoparticle blend having nanoparticles and an additional component, where the nanoparticles are selected from graphene, graphene platelets, graphene oxide, nanorods, nanoplatelets, nanoclays, nano-titanium oxide platelets, and/or nano-oxides, where the additional component is different from the nanoparticles and is selected from nanotubes, graphite, and/or micro-nitride, where the nanoparticles are selected from functionalized nanoparticles, chemically-modified nanoparticles, and/or covalently modified nanoparticles, and a surfactant in an amount effective to suspend the nanoparticle blend in the base fluid, and where the nanoparticle blend improves the performance of a high-frequency downhole tool as compared to an otherwise identical fluid absent the nanoparticle blend. INDEPENDENT CLAIMS are included for the following: (1) method of improving the performance of a high-frequency downhole tool as compared to an otherwise identical fluid but in absent of the nanoparticles involving adding an effective amount of nanoparticles to a base fluid; and (2) modifying the electrical conductivity and the dielectric constant of a fluid involving: adding an effective amount of a nanoparticle blend to a non-aqueous fluid for improving the performance of a high-frequency downhole tool as compared to an otherwise identical fluid but in absent of the nanoparticle blend, where non-aqueous fluid is selected from brine-in-oil emulsion, or a water-in-oil emulsion; and a surfactant is present in the non-aqueous fluid in an amount effective to suspend the nanoparticle blend in the non-aqueous fluid; and improving the performance of a high-frequency downhole tool as compared to an otherwise identical fluid but in absent of the nanoparticle blend.