On the attributes of invert-emulsion drilling fluids modified with graphene oxide/inorganic complexes

On the attributes of invert-emulsion drilling fluids modified with graphene oxide/inorganic complexes

Drillingfluid properties can be modified using a variety of nano-additives to achieve specific rheologicaland physical characteristics. Selected invert-emulsion drillingfluids modified with three different kindsof graphene oxide (GO)-based nanomaterials including GO, Cu(II) salen, and Cu(II) salen@GO werefocused. The corresponding formation damage was evaluated through a set of core-flooding experimentsand computed tomography analyses on selected carbonate samples followed by a set of wettability-basedanalyses and electrical conductivity measurements. The results were bestfitted using the Casson modelwhile the employed nano-additives were evidenced to have negligible effect on reducing the depth ofpenetration. In addition, GO- and Cu(II) salen@GO additives were observed to decline the contact anglefor more than 20% and 35% in carbonate and sandstone samples, respectively, suggesting their potentialto resolve the wettability alteration issues. Furthermore, electrical conductivity of the drillingfluidsamples was increased for about 33 % using both Cu(II) salen and Cu(II) salen@GO additives.

Drillingfluid properties can be modified using a variety of nano-additives to achieve specific rheologicaland physical characteristics. Selected invert-emulsion drillingfluids modified with three different kindsof graphene oxide (GO)-based nanomaterials including GO, Cu(II) salen, and Cu(II) salen@GO werefocused. The corresponding formation damage was evaluated through a set of core-flooding experimentsand computed tomography analyses on selected carbonate samples followed by a set of wettability-basedanalyses and electrical conductivity measurements. The results were bestfitted using the Casson modelwhile the employed nano-additives were evidenced to have negligible effect on reducing the depth ofpenetration. In addition, GO- and Cu(II) salen@GO additives were observed to decline the contact anglefor more than 20% and 35% in carbonate and sandstone samples, respectively, suggesting their potentialto resolve the wettability alteration issues. Furthermore, electrical conductivity of the drillingfluidsamples was increased for about 33 % using both Cu(II) salen and Cu(II) salen@GO additives.