Non aqueous gel technology

• US 20070287767A1
• Filed: 06/08/2007
• Published: 12/13/2007
• Est. Priority Date: 06/09/2006
• Status: Active Grant

• Current Assignee: M-I LLC (Schlumberger NV)
• Original Assignee: M-I LLC (Schlumberger NV)
• Inventors: Ballard, David Antony
• Granted Patent: US 7,727,938 B2
• Time in Patent Office: Days
• US Class Current: 523/130
• CPC Class Codes: C09K 8/32 Non-aqueous well-drilling compositions, e.g. oil-based
• CPC Class Codes: C09K 8/36 Water-in-oil emulsions
• CPC Class Codes: C09K 8/50 Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls compositions for consolidating loose sand or the like around wells C09K8/56
• CPC Class Codes: C09K 8/588 characterised by the use of specific polymers polymeric surfactants C09K8/584

Abstract

A method of treating an earth formation that includes injecting at least one lipophilic monomer into the earthen formation; wherein the at least one lipophilic monomer is selected from epoxide-functionalized derivative of soybean oil linseed oil, rapeseed oil, cashew nut shell oil; perilla oil, tung oil, oiticia oil, safflower oil, poppy oil, hemp oil, cottonseed oil, sunflower oil, high-oleic triglycerides, triglycerides of euphorbia plants, peanut oil, olive oil, olive kernel oil, almond oil, kapok oil, hazelnut oil, apricot kernel oil, beechnut oil, lupine oil, maize oil, sesame oil, grapeseed oil, lallemantia oil, castor oil, herring oil, sardine oil, menhaden oil, whale oil, and tall oil, injecting at least one crosslinking agent into the earthen formation; wherein the at least one crosslinking agent comprises at least one primary amine; and allowing the lipophilic monomer and the crosslinking agent to react in the earth formation is disclosed.

Claims

1. A method of treating an earth formation comprising:

injecting at least one lipophilic monomer into the earthen formation, wherein the at least one lipophilic monomer is selected from epoxide-functionalized derivative of soybean oil, linseed oil, rapeseed oil, cashew nut shell oil;

perilla oil, tung oil, oiticia oil, safflower oil, poppy oil, hemp oil, cottonseed oil, sunflower oil, high-oleic triglycerides, triglycerides of euphorbia plants, peanut oil, olive oil, olive kernel oil, almond oil, kapok oil, hazelnut oil, apricot kernel oil, beechnut oil, lupine oil, maize oil, sesame oil, grapeseed oil, lallemantia oil, castor oil, herring oil, sardine oil, menhaden oil, whale oil, and tall oil;

injecting at least one crosslinking agent into the earthen formation wherein the at least one crosslinking agent comprises at least one primary amine; and

allowing at least one lipophilic monomer and at least one crosslinking agent to react in the earth formation.

2. The method of claim 1, wherein a catalytic amount of tertiary amine is added.

3. The method of claim 1, wherein the at least one lipophilic monomer comprises derivatives of the extracts of cashew nut oil comprising structures with formula:

4. The method of claim 1, wherein the at least one crosslinking agent comprises at least one selected from aliphatic amines, aromatic amines, and cycloaliphatic amines.

5. The method of claim 4, wherein the aliphatic amines comprises at least one selected from triethylenetetramine (TETA), diethylenetriamine (DTA), polyetheramines, polyethyleneimines, and ethylenediamine (EDA).

6. The method of claim 1, wherein a weight ratio of the lipophilic monomer to the crosslinking agent ranges from about 1:

2 to about 2;

1.

7. The method of claim 1, wherein the lipophilic monomer and the crosslinking agent are injected simultaneously.

8. The method of claim 1, wherein the lipophilic monomer and the crosslinking agent are injected sequentially.

9. The method of claim 1, wherein the treatment is at least one selected from wellbore strengthening, oil based LCM treatments, water shutoff treatments, and zonal isolation treatments.

10. The method of claim 1, wherein the gel has an initial viscosity of at least 500 centipose measured at 25°

C. using an LV2 spindle at low rotational speeds.

11. A method of making a non-aqueous gel comprising:

providing a mixture of at least one lipophilic monomer and at least one crosslinking agent in an oil-based solvent,

wherein the at least one lipophilic monomer is selected from an epoxide-functionalized derivative of soybean oil, linseed oil, rapeseed oil, cashew nut shell oil;

perilla oil, tung oil, oiticia oil, safflower oil, poppy oil, hemp oil, cottonseed oil, sunflower oil, high-oleic triglycerides, triglycerides of euphorbia plants, peanut oil, olive oil, olive kernel oil, almond oil, kapok oil, hazelnut oil, apricot kernel oil, beechnut oil, lupine oil, maize oil, sesame oil, grapeseed oil, lallemantia oil, castor oil, herring oil, sardine oil, menhaden oil, whale oil, and tall oil; and

wherein the at least one crosslinking agent comprises at least one primary amine; and

allowing the mixture to react to form a gel.

12. The method of claim 11, wherein a catalytic amount of a tertiary amine is added.

13. The method of claim 11, wherein the at least one lipophilic monomer comprises derivatives of the extracts of cashew nut oil comprising structures with formula:

14. The method of claim 11, wherein the at least one crosslinking agent comprises at least one selected from aliphatic amines, aromatic amines, and cycloaliphatic amines.

15. The method of claim 14, wherein the aliphatic amines comprises at least one selected from triethylenetetramine (TETA), diethylenetriamine (DTA), polyetheramines, polyethyleneimines, and ethylenediamine (EDA).

16. The method of claim 11, wherein a weight ratio of the lipophilic monomer to the crosslinking agent ranges from about 1:

2 to about 2;

1.

17. The method of claim 11, wherein the non-aqueous gel is formed downhole.

18. A non-aqueous gel comprising:

at least one lipophilic monomer, wherein the at least one lipophilic monomer is selected from an epoxide-functionalized derivative of soybean oil, linseed oil, rapeseed oil, cashew nut shell oil;

perilla oil, tung oil, oiticia oil, safflower oil, poppy oil, hemp oil, cottonseed oil, sunflower oil, high-oleic triglycerides, triglycerides of euphorbia plants, peanut oil, olive oil, olive kernel oil, almond oil, kapok oil, hazelnut oil, apricot kernel oil, beechnut oil, lupine oil maize oil, sesame oil, grapeseed oil, lallemantia oil, castor oil, herring oil, sardine oil, menhaden oil, whale oil, and tall oil; and

at least one crosslinking agent, wherein the at least one crosslinking agent comprises at least one primary amine.

19. The non-aqueous gel of claim 18, wherein the at least one lipophilic monomer comprises derivatives of cashew nut oil comprising structures with formula:

20. The non-aqueous gel of claim 18, wherein the at least one crosslinking agent comprises at least one selected from oil soluble polyetheramines, polyalkylamines, and combinations thereof.

21. The non-aqueous gel of claim 18, wherein the at least one crosslinking agent comprises at least one selected from aliphatic amines, aromatic amines, and cycloaliphatic amines.

22. The non-aqueous gel of claim 20, wherein the aliphatic amines comprises at least one selected from triethylenetetramine (TETA), diethylenetriamine (DTA), polyetheramines, polyethyleneimines, and ethylenediamine (EDA).

23. The non-aqueous gel of claim 18, wherein a weight ratio of the lipophilic monomer to the crosslinking agent ranges from about 1:

2 to about 2;

1.

24. The non-aqueous gel of claim 18, wherein the non-aqueous gel is used in at least one selected from wellbore strengthening, oil based LCM treatments, water shutoff treatments, soil stabilization, dust suppression, heat transfer fluid loss additive, and zonal isolation treatments.

25. The non-aqueous gel of claim 18, wherein the gel has an initial viscosity in the range of approximately 500 centipoise to 80,000 centipoise measured at 25°

C. using an LV2 spindle at low rotational speeds.

26. The non-aqueous gel of claim 18, wherein the gel has a hardness in the range of approximately 100 to 5,000 psi.

27. The non-aqueous gel of claim 26, wherein the gel has a hardness in the range of approximately 300 to 2,000 psi.

28. A method of treating an earth formation comprising:

injecting at least one lipophilic monomer and at least one crosslinking agent in a non-aqueous solution and having an initial viscosity in the range of approximately 500 centipoise to 80,000 centipoise measured at 25°

C. using an LV2 spindle at low rotational speeds; and

allowing at least one lipophilic monomer and at least one crosslinking agent to react in the earth formation.

29. The method of claim 28, wherein the viscosity is in the range of 1,000 centipoise to 10,000 centipoise measured at 25°

C. using an LV2 spindle at low rotational speeds.

30. The method of claim 28, wherein a weight ratio of the lipophilic monomer to the crosslinking agent ranges from about 1:

2 to about 2;

1.

31. The method of claim 28, wherein the at least one lipophilic monomer is selected from at least one polyglycidyl ethers of cardanol, castor oil, propoxylated glycerine, polypropylene glycol, propoxylated sorbitol, and epoxidized polysulphide.

32. The method of claim 28, wherein the at least one crosslinking agent is selected from the group consisting of oil soluble polyetheramines, polyalkylamines, and combinations thereof.

33. The method of claim 28, wherein the volume percent of the crosslinking agent relative to the total volume of the gel comprises approximately 10 to 40 percent by volume.