Hydrogel biocement systems and methods
US-2019256770-A1 · Aug 22, 2019 · US
Coated nanosand as relative permeability modifier
US11499092B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11499092-B2 |
| Application number | US-202117179041-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 18, 2021 |
| Priority date | Feb 18, 2021 |
| Publication date | Nov 15, 2022 |
| Grant date | Nov 15, 2022 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Polyacrylamide (PAM)-coated nanosand that may be a relative permeability modifier (RPM) and that is applied to treat a wellbore in a subterranean formation. The treatment may be for excess water production. The PAM-coated nanosand is PAM-hydrogel-coated nanosand. The PAM-coated nanosand os nanosand coated with PAM hydrogel. The PAM hydrogel includes crosslinked PAM in water. Application of the PAM-coated nanosand may reduce water production from the subterranean formation into the wellbore. The PAM hydrogel of the PAM-coated nanosand may expand in a water zone of the subterranean formation to restrict water flow into the wellbore. The PAM hydrogel of the PAM-coated nanosand may contract in an oil zone of the subterranean formation so not to significantly restrict crude oil flow into the wellbore.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of treating a wellbore formed in a subterranean formation, comprising: applying polyacrylamide (PAM)-coated nanosand as a relative permeability modifier (RPM) to the wellbore, wherein the PAM-coated nanosand comprises nanosand coated with PAM hydrogel, and wherein the PAM hydrogel comprises crosslinked PAM in water; and reducing water production from the subterranean formation into the wellbore by applying the PAM-coated nanosand to the wellbore. 2. The method of claim 1 , wherein applying the PAM-coated nanosand comprises pumping the PAM-coated nanosand into the wellbore from an Earth surface, and wherein the PAM-coated nanosand is PAM-hydrogel-coated nanosand. 3. The method of claim 1 , wherein the applying the PAM-coated nanosand comprises flowing the PAM-coated nanosand through the wellbore into the subterranean formation, and wherein the PAM-coated nanosand is a relative permeability modifier (RPM). 4. The method of claim 1 , wherein the applying the PAM-coated nanosand comprises treating the wellbore for excess water production. 5. The method of claim 1 , comprising reducing permeability of a water zone of the subterranean formation by applying the PAM-coated nanosand, wherein applying the PAM-coated nanosand comprises flowing the PAM-coated nanosand through the wellbore into the water zone. 6. The method of claim 1 , wherein the PAM hydrogel of the PAM-coated nanosand expands in a water zone of the subterranean formation. 7. The method of claim 1 , wherein applying the PAM-coated nanosand comprises a bullhead injection of the PAM-coated nanosand. 8. The method of claim 1 , wherein applying the PAM-coated nanosand comprises flowing the PAM-coated nanosand through the wellbore into an oil zone of the subterranean formation and into a water zone of the subterranean formation, wherein the PAM-coated nanosand reduces permeability of the water zone more than reduces permeability of the oil zone. 9. The method of claim 8 , wherein the PAM-coated nanosand does not reduce the permeability of the oil zone. 10. The method of claim 1 , wherein the PAM hydrogel of the PAM-coated nanosand contracts in an oil zone of the subterranean formation.
Assignees
Inventors
Classifications
Homopolymers or copolymers of acrylamide or methacrylamide · CPC title
- C09K8/92Primary
characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title
containing cross-linking agents · CPC title
- C09K8/504Primary
Compositions based on water or polar solvents (C09K8/502 takes precedence) · CPC title
Nanoparticle-containing well treatment fluids · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11499092B2 cover?
- Polyacrylamide (PAM)-coated nanosand that may be a relative permeability modifier (RPM) and that is applied to treat a wellbore in a subterranean formation. The treatment may be for excess water production. The PAM-coated nanosand is PAM-hydrogel-coated nanosand. The PAM-coated nanosand os nanosand coated with PAM hydrogel. The PAM hydrogel includes crosslinked PAM in water. Application of the …
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification C09K8/92. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 15 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).