Fracturing process and composition

A method of fracturing a subterranean formation comprising

• pumping a fluid suspension containing a gellant downwell under fracturing conditions to form a fracture in the subterranean formation, and depositing gelled suspension in the fracture, the fluid suspension further comprising an aqueous liquid, proppant, and solid particulate matter comprising an organic polymeric compound having an average molecular weight of at least 10,000, or mixture of such compounds, selected from polyester, polyurethane, polymers of acrylic acid, aramides, acrylonitrile, polyamides, vinylidene, olefins, diolefins, vinyl alcohol, and vinyl chloride, and which compound or compounds react or decompose over time under downwell conditions, in an amount at least sufficient to provide a concentration of a composition or compositions, upon such reaction or decomposition of the solid particulate matter, effective to degrade gel formed by the suspension;
• removing solid particulate matter from the fracture by reaction or decomposition of said particulate matter in the fracture, the reaction or decomposition products from such reaction or decomposition reacting with the gellant and decomposing or breaking gelled suspension in the fracture.

A method of fracturing a subterranean formation comprising

• providing a fluid suspension formed by blending, in any sequence, an aqueous liquid, a gellant in an amount sufficient to gel the fluid suspension, proppant, and solid particulate matter comprising an organic polymeric compound having an average molecular weight of at least 10,000, or mixture of such compounds, selected from polyester, polyurethane, polymers of acrylic acid, aramides, acrylonitrile, polyamides, vinylidene, olefins, diolefins, vinyl alcohol, and vinyl chloride, and which compound or compounds react or decompose over time in an amount at least sufficient to provide an amount of their reaction or decomposition products, upon such reaction or decomposition of the particulate matter, effective to degrade a gel formed by the fluid suspension in a fracture;
• pumping the suspension formed downwell under fracturing conditions and forming or extending a fracture in the subterranean formation, and depositing gelled suspension in the fracture;
• allowing gelled suspension in said fracture to break due to degradation by said composition or compositions.

A method of breaking a gelled suspension in a fracture comprising allowing reaction of the gelled suspension or component thereof with an effective amount of one or more reaction or decomposition products from the reaction or decomposition in the downwell environment of solid particulate matter in the gelled suspension, the particulate matter being selected from reactive or decomposable solid organic polymeric compounds, and mixtures thereof, such compound or compounds having an average molecular weight of at least 10,000 selected from polyester, polyurethane, polymers of acrylic acid, aramides, acrylonitrile, polyamides, vinylidene, olefins, diolefins, vinyl alcohol, and vinyl chloride.