Removal of wellbore residues
AssigneeSchlumberger Technology Corporation
InventorsAlan Gilmour, Ralph Cheung, Alexander Bui
Life of this patent
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Abstract
A wellbore fluid composition effective to reduce oil-containing residue and water wet wellbore surfaces is provided. The fluid composition comprises a terpene composition and a surfactant. Methods for use of the fluid composition as a single spacer or as a multiple spacer in conjunction with a second fluid are provided. Methods for use of the composition in reduction or removal of oil-containing residue from wellbore surfaces, as a clean-up fluid, in wellbore completions, as a displacement fluid, and in wellbore treatment are provided.
Claims59
The method of reducing oil-containing residue in or on a wellbore surface comprising
- contacting wellbore surface with a wellbore fluid composition comprising a terpene composition and surfactant;
- and then
- contacting the wellbore surface with an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
A method of reducing oil-containing residue in or on a wellbore surface comprising
- contacting wellbore surface with a wellbore fluid composition comprising a terpene composition selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- a surfactant;
- and a viscosifier, and then
- contacting the wellbore surface with an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
The method of clean-up of oil-containing residue from an open-hole reservoir section of a well comprising contacting the reservoir section with a wellbore fluid composition comprising a terpene composition, a viscosifier, and a surfactant, wherein the terpene composition is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- the method further comprising contacting the reservoir section with an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
The method of displacing an oil-based or synthetic-based mud in an open-hole reservoir section of a well comprising
- injecting a wellbore fluid composition comprising a terpene composition, a viscosifier, and a surfactant, wherein the terpene composition is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- the method further comprising injecting an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
The method of displacing an oil-based or synthetic based mud to a brine or base-oil or viscosified completion fluid before or after running a sand control screen downhole, comprising
- injecting a wellbore fluid composition comprising a terpene composition, a viscosifier, and a surfactant, wherein the terpene composition is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- the method further comprising injecting an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
The method of removing oil-containing residue that impairs hydrocarbon-production in an open-hole reservoir after completion or after gravel packing with a water-based or an oil-based gravel pack carrier comprising
- injecting a wellbore fluid composition comprising a terpene composition, a viscosifier, and a surfactant, wherein the terpene composition is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- the method further comprising injecting an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
A method for treating a wellbore comprising
- injecting a wellbore fluid composition comprising a terpene composition, a viscosifier, and a surfactant, wherein the terpene composition is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- the method further comprising injecting an aqueous fluid comprising a viscosifying organic polymer and wetting surfactant.
A wellbore fluid composition comprising at least 85 percent of a terpene composition which is selected from the group consisting of cyclic terpenes, and mixtures thereof;
- acyclic terpenes, and mixtures thereof;
- cyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- acyclic terpenoids having one or more benzenoid groups, and mixtures thereof;
- and mixtures thereof;
- a viscosifier, and a wetting surfactant that is present in a concentration of from about 0.1 to about 12 percent, and comprises a mixture of a sulphated polyoxyethylenated alcohol and an alkyl ethoxylated alcohol.
A wellbore fluid composition comprising from 25% to about 90 percent of D-Limonene, about 0.1 to about 10 percent wetting surfactant comprising a mixture of a sulphated polyoxyethylenated alcohol and an alkyl ethoxylated alcohol, about 0.3 to about 3 percent viscosifier, and about 5 percent to about 70 percent of an oil or synthetic base fluid.
A wellbore fluid composition comprising 93 to 96 percent D-limonene, 0.1 to 1.5 percent ether carboxylate surfactant and sulphated polyoxyethlylenated alcohol surfactant, 0.5 percent to 1.5 percent alkyl ethoxylated alcohol, about 0.3 to about 3 percent viscosifier, and water.
A wellbore fluid composition comprising about 25 percent to about 30 percent of D-limonene, about 1 to about 5 percent wetting surfactant comprising a mixture of a sulphated polyoxyethylenated alcohol and an alkyl ethoxylated alcohol, about 1 to about 1.5 percent viscosifier, and about 60 percent to about 70 percent of an oil or synthetic base fluid.
A wellbore fluid composition formed by blending, in any order, a terpene composition, a wetting surfactant comprising a mixture of a sulphated polyoxyethylenated alcohol and an alkyl ethoxylated alcohol, a viscosifier, and an oil or synthetic base fluid, in an amount sufficient to reduce oil-containing residue from and water wet wellbore surfaces.
A composition for cleaning a section of a wellbore prior to a cementing operation, said wellbore having a casing suspended therein, comprising about 60% by volume of a terpene composition;
- about 0.05% by volume of an alkoxylated carboxylic acid;
- an alkoxylated alkyl sulfate;
- an alkoxylated alcohol, and water.
Dependencies are inferred from the claim text.