Downhole structures including soluble glass
US-2016369154-A1 · Dec 22, 2016 · US
Composition and method for remediation of near wellbore damage
US9752071B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9752071-B2 |
| Application number | US-201414208685-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 13, 2014 |
| Priority date | Mar 15, 2013 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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- Title
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Abstract
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Aspects of the invention relate to compositions and methods that are used for remediation of near-wellbore damage. A specific aspect is a composition comprising an olefin sulfonate, a sulfosuccinate, and a chemical selected from the group consisting of an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for remediation of existing damage in a region near an injection wellbore in communication with a subterranean reservoir wherein the injection wellbore is not intended for receiving hydrocarbons and wherein the existing damage is caused by previous injection of a composition containing a polymer emulsion into the injection wellbore, the method comprising injecting into the subterranean reservoir a composition comprising an emulsion polymer, a C 20 internal olefin sulfonate, a C 15-18 internal olefin sulfonate, and an alcohol alkoxylated carboxylate, thereby dissolving, cleaning and/or flushing the polymer emulsion away from the injection wellbore. 2. The method of claim 1 , wherein the injection of the composition stimulates the region near the injection wellbore in communication with the subterranean reservoir. 3. The method of claim 1 , wherein the injection improves the relative permeability of the region near the injection wellbore in communication with the subterranean reservoir. 4. The method of claim 3 , wherein the relative permeability of the region near the injection wellbore in communication with the subterranean reservoir is increased by at least 250 percent. 5. The method of claim 1 , wherein the temperature of the region near the injection wellbore in communication with the subterranean reservoir is above 55° C. 6. The method of claim 5 , wherein the composition further comprises an alkali. 7. The method of claim 1 , further comprising a co-solvent.
Assignees
Inventors
Classifications
- C09K8/032Primary
Inorganic additives · CPC title
Enhanced recovery methods for obtaining hydrocarbons · CPC title
Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning · CPC title
- C09K8/58Primary
Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids · CPC title
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- What does patent US9752071B2 cover?
- Aspects of the invention relate to compositions and methods that are used for remediation of near-wellbore damage. A specific aspect is a composition comprising an olefin sulfonate, a sulfosuccinate, and a chemical selected from the group consisting of an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof.
- Who is the assignee on this patent?
- Chevron Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification C09K8/032. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 05 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).