Methods of forming organophilic fluid loss materials, and related organophilic fluid loss materials and methods

Patent metadata

Field	Value
Publication number	US-12378461-B2
Application number	US-202418405244-A
Country	US
Kind code	B2
Filing date	Jan 5, 2024
Priority date	Jan 5, 2024
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A method of forming a fluid loss material for a wellbore fluid includes mixing tannin at least one modifier to form a mixture, heating the mixture to a temperature greater than about 100° C. to react the tannin with the at least one modifier to form a modified tannin, and reacting the modified tannin with an amine to form an organophilic fluid loss material comprising the amine bonded to the modified tannin. Related organophilic fluid loss materials and methods of operating a wellbore are also disclosed.

First claim

What is claimed is:

1. A method of forming a fluid loss material for a wellbore fluid, the method comprising:
mixing tannin with at least one modifier to form a mixture, wherein mixing tannin with at least one modifier comprises mixing the tannin with an oxidizer;
heating the mixture to a temperature greater than about 100° C. to react the tannin with the at least one modifier to form a modified tannin; and
reacting the modified tannin with an amine to form an organophilic fluid loss material comprising the amine bonded to the modified tannin.

2. The method of claim 1 , wherein mixing tannin with at least one modifier to form a mixture comprises mixing the tannin with a base to form the mixture to have a pH greater than about 10.0.

3. The method of claim 1 , wherein mixing tannin with at least one modifier to form a mixture comprises mixing tannin with an oxidizer comprising hydrogen peroxide or a peroxide.

4. The method of claim 1 , wherein mixing tannin with at least one modifier comprises mixing the tannin with at least one of formaldehyde, paraformaldehyde, hexamethylenetetramine, glyoxal, glutaraldehyde, or 5-hydroxy-1-methyl-1H-1,2,4-triazole-3-carboxylic acid (HMTCA).

5. The method of claim 1 , wherein mixing tannin with at least one modifier comprises mixing the tannin with hexamethylenetetramine.

6. The method of claim 1 , wherein reacting the modified tannin with an amine comprises reacting the modified tannin with at least one of tallow alkylamine, stearylamine, dodecyl amine, oleyl amine, or hexamethylenediamine.

7. The method of claim 1 , wherein heating the mixture to a temperature greater than about 100° C. to react the tannin with the at least one modifier to form a modified tannin comprises forming the modified tannin to comprise one or more quinone groups.

8. The method of claim 1 , wherein reacting the modified tannin with an amine comprises forming the organophilic fluid loss material, wherein one or more phenol groups of the modified tannin is bonded to an alkyl group and the alkyl group is bonded to an amine group.

9. The method of claim 1 , wherein reacting the modified tannin with an amine comprises forming the organophilic fluid loss material comprising at least one aryl group wherein at least one carbon atom of the at least one aryl group is double bonded to an oxygen atom.

10. A wellbore fluid, comprising:
a base fluid; and
an organophilic fluid loss material comprising a reaction product of:
a modified tannin, wherein the modified tannin is modified with at least one oxidizer; and
an amine.

11. The wellbore fluid of claim 10 , wherein the fluid loss material comprises a reaction product of the modified tannin, the amine, and at least one of formaldehyde, paraformaldehyde, hexamethylenetetramine, glyoxal, glutaraldehyde, or HMTCA.

12. The wellbore fluid of claim 10 , wherein the amine comprises a C 6 to a C 22 alkyl amine.

13. The wellbore fluid of claim 10 , wherein the amine comprises at least one of tallow alkylamine, stearylamine, dodecyl amine, oleyl amine, or hexamethylenediamine.

14. The wellbore fluid of claim 10 , wherein the amine comprises a saturated amine.

15. The wellbore fluid of claim 10 , wherein the amine comprises at least one of dodecyl amine, oleyl amine, or stearylamine.

16. The wellbore fluid of claim 10 , wherein the reaction product comprises an amine group bonded to a carbon atom of a quinone group.

17. The wellbore fluid of claim 10 , wherein the reaction product comprises a nitrogen atom double bonded to a carbon atom of a quinone group.

18. A method of operating a wellbore, the method comprising:
pumping a drilling fluid into a wellbore extending through an earth formation, the drilling fluid comprising:
a base fluid; and
an organophilic fluid loss material comprising a reaction product of:
a modified tannin, wherein the modified tannin is modified with at least one oxidizer; and
an amine; and

forming a filtercake on surfaces of the earth formation.

Assignees

• Schlumberger Technology Corp

Inventors

• Khramov Dimitri
• Barmatov Evgeny

Classifications

• E21B21/003 Primary

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title

• C09K8/035

  Organic additives · CPC title

• C09K8/44 Primary

  containing organic binders only · CPC title