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US-2017313928-A1 · Nov 2, 2017 · US
Using synthetic acid compositions as alternatives to conventional acids in the oil and gas industry
US11795381B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11795381-B2 |
| Application number | US-202218053647-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 8, 2022 |
| Priority date | Jul 29, 2016 |
| Publication date | Oct 24, 2023 |
| Grant date | Oct 24, 2023 |
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- Title
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- Abstract
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Abstract
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The invention includes a method of reducing a need to re-acidize a hydrocarbon-containing formation. The method comprises providing a composition a HCl and lysine mixture and water wherein a molar ratio between the HCl and the lysine mixture ranges between 3:1 and 12.5:1, and the composition has an initial pH of less than 1; injecting the composition into the formation; allowing a sufficient time for the composition to become a spent acid composition and to subsequently create wormholes in the formation by dissolving calcium carbonate in the formation; maintaining the dissolved calcium carbonate in suspension in the spent acid composition to prevent reprecipitation of the calcium carbonate into the wormholes; removing the spent acid composition containing the dissolved calcium carbonate from the formation; and wherein a pH of the spent acid composition ranges between 4 and 6.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of reducing a need to re-acidize a hydrocarbon-containing formation, said method comprising: providing a composition comprising a HCl and lysine mixture and water; wherein a molar ratio between the HCl and the lysine mixture ranges between 3:1 and 12.5:1, and said composition has an initial pH of less than 1; injecting said composition downhole at a desired injection rate into said hydrocarbon-containing formation and injecting at a pressure below a fracking pressure of the hydrocarbon-containing formation; allowing a sufficient period of time for the injected composition to contact said hydrocarbon-containing formation to become a spent acid composition and to subsequently create wormholes in said hydrocarbon-containing formation by dissolving calcium carbonate in said hydrocarbon-containing formation; maintaining the dissolved calcium carbonate in suspension in the spent acid composition to prevent reprecipitation of the calcium carbonate into said wormholes; removing the spent acid composition containing the dissolved calcium carbonate from said hydrocarbon-containing formation; and wherein a pH of the spent acid composition ranges between 4 and 6.
Assignees
Inventors
Classifications
- C09K8/74Primary
combined with additives added for specific purposes · CPC title
inorganic depositions, e.g. sulfates or carbonates · CPC title
Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title
containing inorganic compounds (proppants C09K8/80) · CPC title
containing organic compounds · CPC title
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Frequently asked questions
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- What does patent US11795381B2 cover?
- The invention includes a method of reducing a need to re-acidize a hydrocarbon-containing formation. The method comprises providing a composition a HCl and lysine mixture and water wherein a molar ratio between the HCl and the lysine mixture ranges between 3:1 and 12.5:1, and the composition has an initial pH of less than 1; injecting the composition into the formation; allowing a sufficient ti…
- Who is the assignee on this patent?
- Fluid Energy Group Ltd, Dorf Ketal Chemicals Fze
- What technology area does this patent fall under?
- Primary CPC classification C09K8/74. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 24 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).