Submicron particles surfactant method for improved oil recovery from subterranean reservoirs
First Claim
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1. A method of stimulating a well comprising:
- i) forming a stimulation fluid comprising;
at least one surfactant; and
submicron fumed silica particles having a particle size greater than 200 nm and up to 800 nm and a specific surface area greater than about 5 square meters per gram, wherein the stimulation fluid changes a wettability of a reservoir matrix, and wherein the submicron fumed silica particles contributes to said change; and
ii) introducing the stimulation fluid into a wellbore in contact with the reservoir matrix,whereby the well is stimulated to improve its hydrocarbon production due in part to the wettability change.
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Abstract
Methods of stimulating a well comprising providing a stimulation fluid comprising at least one surfactant and submicron particles, the submicron particles having a particle size between about 200 nm and about 800 nm and a specific surface area greater than about 5 square meters per gram; and introducing the stimulation fluid into a wellbore. Additional methods to enhance oil recovery from subterranean reservoirs accessible via a well are described.
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29 Claims
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1. A method of stimulating a well comprising:
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i) forming a stimulation fluid comprising;
at least one surfactant; and
submicron fumed silica particles having a particle size greater than 200 nm and up to 800 nm and a specific surface area greater than about 5 square meters per gram, wherein the stimulation fluid changes a wettability of a reservoir matrix, and wherein the submicron fumed silica particles contributes to said change; andii) introducing the stimulation fluid into a wellbore in contact with the reservoir matrix, whereby the well is stimulated to improve its hydrocarbon production due in part to the wettability change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to enhance oil recovery from a subterranean reservoir, the reservoir being accessible via a well, the method comprising:
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injecting a treatment fluid comprising submicron fumed silica particles and at least one surfactant into the well, wherein the submicron fumed silica particles have a particle size greater than 200 nm and up to 800 nm and a specific surface area greater than about 5 square meters per gram, wherein the treatment fluid changes a wettability of a reservoir matrix, and wherein the submicron fumed silica particles contribute to said change; and injecting a well-servicing volumetric solution into the well to perform a second well treatment process, wherein the second well treatment process is selected from the group consisting of a scale inhibition squeeze process, a well acidizing process, a chemical process to reduce water production rate, an acid fracturing process, and a hydraulic fracturing process, wherein the treatment fluid and the well-servicing volumetric solution are injected into the well within less than about 21 days of one another. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method to enhance oil recovery from a subterranean reservoir, the reservoir being accessible via a well, the method comprising:
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forming an EOR injection fluid comprising submicron fumed silica particles and at least one surfactant into the well, wherein the submicron fumed silica particles have a particle size greater than 200 nm and up to 800 nm and a specific surface area greater than about 5 square meters per gram, wherein the EOR injection fluid changes a wettability of a reservoir matrix, and wherein the submicron fumed silica particles contribute to said change; and introducing the EOR injection fluid into the reservoir via the well, whereby hydrocarbon production from the reservoir is enhanced due in part to the wettability change.
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Specification