Foamable resin composition for controlling loss circulation

Patent metadata

Field	Value
Publication number	US-12049549-B2
Application number	US-202318138830-A
Country	US
Kind code	B2
Filing date	Apr 25, 2023
Priority date	Aug 19, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

This disclosure relates to a foamable resin composition containing a nitrogen gas-generating compound and methods of using the composition for loss circulation control.

First claim

What is claimed is:

1. A method of treating a loss circulation zone in a subterranean formation, the method comprising:
introducing a foamable resin composition into the loss circulation zone, the foamable resin composition comprising:
an epoxy resin selected from a bisphenol-A-(epichlorohydrin) epoxy resin with oxirane mono [(C 12 -C 14 alkyloxy)methyl] derivatives and a bisphenol-A-(epichlorohydrin) epoxy resin with 1,6-hexanediol diglycidyl ether in an amount of about 75% to about 85% by weight of the composition;
a nitrogen gas-generating compound in an amount of about 5% to about 15% by weight of the composition;
a hydroxysultaine surfactant in an amount of about 1% to about 5% by weight of the composition; and
a curing agent in an amount of about 10% to about 13% by weight of the composition; and

forming a foamed resin composition;
wherein the foamed resin composition seals the loss circulation zone.

2. The method of claim 1 , wherein the foamed resin composition is formed under downhole conditions.

3. The method of claim 2 , wherein the downhole conditions comprise temperatures between about 95° F and about 450° F.

4. The method of claim 1 , wherein the epoxy resin is about 77% to about 78% by weight of the foamable resin composition.

5. The method of claim 1 , wherein the nitrogen gas-generating compound is an azo compound.

6. The method of claim 5 , wherein the azo compound is azodicarbonamide.

7. The method of claim 1 , wherein the nitrogen gas-generating compound is about 7% to about 8% by weight of the foamable resin composition.

8. The method of claim 7 , wherein the hydroxysultaine surfactant is cocamidopropyl hydroxysultaine.

9. The method of claim 1 , wherein the hydroxysultaine surfactant is about 2% to about 3% by weight of the foamable resin composition.

10. The method of claim 1 , wherein the curing agent is diethylenetriamine (DETA).

11. The method of claim 1 , wherein the curing agent is about 11% to about 12% by weight of the foamable resin composition.

12. The method of claim 1 , wherein the weight ratio of the nitrogen gas-generating compound to the surfactant is about 3:1.

13. The method of claim 1 , wherein the curing agent is a linear ethylene amine containing two primary nitrogens and one secondary nitrogen.

Assignees

• Saudi Arabian Oil Co

Inventors

• Wagle Vikrant
• Alyami Abdullah
• Al-Safran Ali
• Alharthi Mohammad

Classifications

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C04B26/14

  Polyepoxides · CPC title

• C08J2203/04

  N2 releasing, ex azodicarbonamide or nitroso compound · CPC title

• C09K8/426

  for plugging · CPC title

• C08J9/122 Primary

  Hydrogen, oxygen, CO2, nitrogen or noble gases · CPC title