Method of improving rock hardness in carbonate formations
US-11365345-B2 · Jun 21, 2022 · US
Rock hardness for hydraulic fracturing and art preservation
US11492494B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11492494-B2 |
| Application number | US-202016828391-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 24, 2020 |
| Priority date | Mar 24, 2020 |
| Publication date | Nov 8, 2022 |
| Grant date | Nov 8, 2022 |
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- Title
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Abstract
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A method of increasing the strength of a carbonate rock is described. The carbonate rock may be located within a subterranean carbonate formation or may be located on a building exterior. The method involves contacting the carbonate rock with a composition comprising a zinc salt or a silicon alkoxide. This may increase the hardness of the carbonate rock by 10% or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for treating a carbonate rock, comprising: contacting the carbonate rock with an aqueous composition comprising 0.01-1.0 M zinc salt, wherein the contacting is maintained for a time period of 12-72 h, thus forming a treated rock having a hardness determined by Young's modulus that is at least 10% greater than the carbonate rock. 2. The method of claim 1 , wherein the carbonate rock is part of a building exterior or part of an outdoor ornamental structure. 3. The method of claim 1 , wherein the carbonate rock is within a subterranean carbonate formation. 4. The method of claim 1 , wherein the hardness of the treated rock is 20-80% greater than the carbonate rock. 5. The method of claim 1 , wherein the zinc salt is at least one selected from the group consisting of ZnCl 2 , ZnBr 2 , ZnI 2 , ZnF 2 , ZnCl 2 , ZnO, ZnS, ZnSO 4 , ZnSe, Zn(OH) 2 , Zn(NO 3 ) 2 , and Zn 3 (PO 4 ) 2 . 6. The method of claim 1 , wherein the zinc salt is at least one selected from the group consisting of ZnSO 4 , Zn(OH) 2 , and Zn 3 (PO 4 ) 2 . 7. The method of claim 1 , wherein the zinc salt is ZnSO 4 . 8. The method of claim 1 , wherein the aqueous composition consists of the zinc salt and water. 9. The method of claim 8 , wherein the concentration of the zinc salt is 0.30-0.60 M. 10. The method of claim 1 , wherein the aqueous composition further comprises a carbonate or a bicarbonate salt. 11. The method of claim 1 , wherein the carbonate rock comprises at least 85 wt % calcium carbonate relative to a total weight of the carbonate rock. 12. The method of claim 1 , wherein the treated rock comprises ZnCO 3 . 13. The method of claim 1 , wherein the treated rock comprises nanoplatelets. 14. The method of claim 1 , wherein the treated rock has a permeability that is decreased by 40-80% relative to a permeability of the carbonate rock.
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Classifications
by d-values or two theta-values, e.g. as X-ray diagram · CPC title
obtained by SEM · CPC title
- C01G9/00Primary
Compounds of zinc · CPC title
Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer · CPC title
the particles consisting of zinc or a zinc alloy · CPC title
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- What does patent US11492494B2 cover?
- A method of increasing the strength of a carbonate rock is described. The carbonate rock may be located within a subterranean carbonate formation or may be located on a building exterior. The method involves contacting the carbonate rock with a composition comprising a zinc salt or a silicon alkoxide. This may increase the hardness of the carbonate rock by 10% or more.
- Who is the assignee on this patent?
- Univ King Fahd Pet & Minerals
- What technology area does this patent fall under?
- Primary CPC classification C01G9/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 08 2022 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).