Methods and materials for refracturing a partially depleted oil and gas well
US-2018346786-A1 · Dec 6, 2018 · US
Diverting agents for well stimulation
US11814583B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11814583-B2 |
| Application number | US-202117369149-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2021 |
| Priority date | Jul 22, 2020 |
| Publication date | Nov 14, 2023 |
| Grant date | Nov 14, 2023 |
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Abstract
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The present application provides expandable chemical diverting agents, such as flexible polyurethanes and swellable hydrogels, or chemical precursors thereof. Methods of using these expandable diverting agents for treating a subterranean formation are also provided. An example of subterranean formation treatment process described in the present application is wellbore stimulation, such as hydraulic fracturing or matrix acid treatment.
First claim
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What is claimed is: 1. A method of treating a subterranean formation penetrated by a wellbore and comprising a flow channel protruding from an outside diameter of the wellbore into the subterranean formation, the method comprising introducing into the flow channel a diverting agent that is adapted to expand in response to an increase in size or volume of the flow channel thereby maintaining or increasing a contact area between the diverting agent and an inner surface of the flow channel, wherein the diverting agent comprises a flexible porous polyurethane material and introducing the diverting agent into the flow channel comprises introducing into the flow channel a liquid pre-polymer blend comprising a polyisocyanate component and a polyol component which chemically react in the flow channel to produce the flexible porous polyurethane material. 2. The method of claim 1 , wherein the treating of the subterranean formation comprises stimulation of the subterranean formation. 3. The method of claim 2 , wherein the stimulation comprises hydraulic fracturing. 4. The method of claim 3 , wherein the flow channel comprises a fracture. 5. The method of claim 2 , wherein the stimulation comprises an acid treatment. 6. The method of claim 5 , wherein the flow channel comprises a wormhole. 7. The method of claim 1 , wherein the flexible porous polyurethane material comprises a polyurethane foam. 8. The method of claim 1 , comprising introducing a treatment fluid into the wellbore before, after, or concurrently with introducing the diverting agent into the flowing channel. 9. The method of claim 8 , wherein the treatment fluid is a stimulation fluid. 10. The method of claim 1 , wherein the diverting agent is degradable. 11. The method of claim 10 , wherein the diverting agent is degradable by hydrolysis, oxidation, or reduction. 12. The method of claim 10 , wherein the diverting agent is degradable by light, heat, or pressure.
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- What does patent US11814583B2 cover?
- The present application provides expandable chemical diverting agents, such as flexible polyurethanes and swellable hydrogels, or chemical precursors thereof. Methods of using these expandable diverting agents for treating a subterranean formation are also provided. An example of subterranean formation treatment process described in the present application is wellbore stimulation, such as hydra…
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification C09K8/887. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 14 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).