Use of a composition for stabilizing a geological formation in oil fields, gas fields, water pumping fields, mining or tunnel constructions
AssigneeBASF SE
InventorsRadoslaw Kierat, Bernhard Feichtenschlager, Julia Göschel, Hendrik Wagner
Life of this patent
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Abstract
The present invention relates to the use of a composition for stabilizing a geological formation in oil fields, gas fields, water pumping fields, mining or tunnel constructions. The composition has a hardening temperature in the range from about 40° C. to about 120° C. and can therefore be used to stabilize a geological formation in oil fields, gas fields, water pumping fields as well as in mining or tunnel constructions.
Claims20
A method for stabilizing a geological formation in oil fields or gas fields, which comprises providing a composition, introducing the composition into the formation and allowing the composition to cure;
- wherein the composition comprises
- (a) a polyisocyanate,
- (b) a mixture obtained by mixing a salt selected from an alkali metal halide, cyanide, nitrate, sulfate, hydrogen sulfate, sulfite, hydrogen sulfite, carbonate, hydrogen carbonate, phosphate, hydrogen phosphate, dihydrogen phosphate, carboxylate, sulfonate, or amidosulfonate or from an alkaline earth metal halide, hydrogen sulfate, or nitrate, with a compound obtained by reacting a polyisocyanate (a1) with a compound having one or more hydroxy groups and
- (c) an epoxy group containing compound;
- wherein the composition is a composition for stabilizing a geological formation in oil fields gas fields;
- wherein the amount of the components (b) and (c) together is 0.1 to 15 wt. %, based on the total weight of components (a) to (c) of the composition;
- and
- wherein the composition has a hardening temperature of 40 to 150° C.;
- and
- wherein the composition provides an open time of more than 60 min,
- wherein open time is defined as a time range, beginning with the mixing of the components to the time when the viscosity of the mixture has increased to a value, high enough to exceed the power of a Shyodu Gel Timer stirrer, Type 100, Version 2012.
A method for stabilizing a geological formation in oil fields or gas fields, which comprises providing a composition, introducing the composition into the formation and allowing the composition to cure;
- the composition comprising
- (a) a polyisocyanate,
- (b) a mixture obtained by mixing a salt selected from an alkali metal halide, cyanide, nitrate, sulfate, hydrogen sulfate, sulfite, hydrogen sulfite, carbonate, hydrogen carbonate, phosphate, hydrogen phosphate, dihydrogen phosphate, carboxylate, sulfonate, or amidosulfonate or from an alkaline earth metal halide, hydrogen sulfate, or nitrate, with a compound obtained by reacting 50 to 150 mol %, of polyisocyanate (a1) with an alcohol having one hydroxy group, and
- (c) an epoxy group containing compound,
- wherein the mixture is essentially free of polyols;
- wherein the amount of the components (b) and (c) together is 0.1 to 15 wt. %, based on the total weight of components (a) to (c) of the composition;
- wherein the composition has a hardening temperature of 40 to 150° C.;
- and
- wherein the composition provides an open time of more than 60 min
- wherein open time is defined as a time range, beginning with the mixing of the components to the time, when the viscosity of the mixture has increased to a value, high enough to exceed the power of a Shyodu Gel Timer stirrer, Type 100, Version 2012.
Dependencies are inferred from the claim text.