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AssigneeSchlumberger Technology Corporation
InventorsAlexander Alexandrovich Burukhin, Anatoly Vladimirovich Matveev, Elena Mikhailovna Pershikova
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This invention relates to the oil and gas industry, in particular, to the technology for preventing proppant/sand entrainment from a reservoir. The elimination of sand entrainment and a significant increase in hydrodynamic permeability of the sand pack in an area near the wellbore are achieved through the use of a sand and/or proppant & proppant material mixture at the final stage of the fracture filling process, where individual particles of the proppant material have at least one shape of those included in the group: plates, lattices, hollow bars, inside-hollow tubes with a closed impermeable cavity or cavities, toroidal particles; elongated particles in the form of ovals, pellets or plates; cylinders with a closed impermeable cavity or cavities; blocks with a comb multi-channel structure with throughout channels of the ellipse or polygon cross-section; the polygon has at least three sides and the block containing channels has the ellipse or polygon cross-section, with a minimum number of polygon sides equal to 3, blocks with a 3D comb-arch permeable or impermeable structure, where the blocks are shaped as a sphere or a regular/irregular parallelepiped to be made of one of the following materials: ceramics, glassworks, glass-ceramics, cement, expanded-clay lightweight concrete, polymer, and metal, stainless steel or carbon steel. Hollow bars could have closed edges and sharpened beveled edges. Elongated particles in the form of ovals or pellets could have a closed impermeable cavity inside.
A method of proppant entrainment prevention comprising introducing in a final stage of a fracture filling process, a proppant material and at least one of a sand or proppant, wherein particles forming the proppant material has at least one of a shape selected from the group consisting of plates, lattices, hollow bars, inside-hollow tubes with a closed impermeable cavity or cavities, or toroidal particles.
A method of proppant entrainment prevention comprising injecting sand and/or proppant and proppant material mixture in a final stage of a fracture filling process, wherein the proppant material has an elongated shape which is at least one of oval, pellet or plate.
A method of proppant entrainment prevention comprising injecting sand and/or proppant and proppant material mixture in a final stage of a fracture filling process, wherein individual particles of the proppant material have a shape of blocks with a comb multi-channel structure with throughout channels of the ellipse or polygon cross-section, and wherein the polygon has at least three sides and the block containing channels has the ellipse or polygon cross-section, with a minimum number of polygon sides equal to 3.
A method of proppant entrainment prevention comprising injecting sand and/or proppant and proppant material mixture is used at the final stage of the fracture filling process, wherein proppant material particles have a shape with a big-to-small side ratio in excess of 5.
A method of proppant entrainment prevention wherein a sand and/or proppant and proppant material mixture is used at the final stage of a fracture filling process, and wherein cylinders with a closed impermeable cavity or cavities are used as a proppant material.
A method of proppant entrainment prevention wherein a sand and/or proppant and proppant material mixture is used at the final stage of the fracture filling process, and wherein individual particles of the proppant material are shaped as blocks with a 3D comb-arch permeable or impermeable structure, where the blocks are shaped as a sphere or a regular/irregular parallelepiped.
A method of proppant entrainment prevention wherein a sand and/or proppant and proppant material mixture is used at the final stage of the fracture filling process, wherein particles forming the proppant material have at least one shape selected from the group consisting of plates, lattices, hollow bars, inside-hollow tubes with a closed impermeable cavity or cavities, toroidal particles, elongated particles in the form of ovals, pellets or plates, cylinders with a closed impermeable cavity or cavities, blocks with a comb multi-channel structure with throughout channels of the ellipse or polygon cross-section, wherein the polygon has at least three sides and the block containing channels has the ellipse or polygon cross-section, with a minimum number of polygon sides equal to 3, blocks with a 3D comb-arch permeable or impermeable structure, and wherein the blocks are shaped as a sphere or a regular/irregular parallelepiped.
Dependencies are inferred from the claim text.