Oil-based drilling fluid compositions which include layered double hydroxides as rheology modifiers and amino amides as emulsifiers

Patent metadata

Field	Value
Publication number	US-10647903-B2
Application number	US-201816059550-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 15, 2017
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present application discloses drilling fluid compositions, methods for making drilling fluids, and methods for drilling subterranean wells utilizing the drilling fluids. According to one embodiment, a drilling fluid composition may include an oil phase, an aqueous phase, an emulsifier, and a rheology modifier. The emulsifier may include an amino amide, and the rheology modifier may include a layered double hydroxide, such as Mg/Al-Myristate layered double hydroxide.

First claim

What is claimed is:

1. An oil-based drilling fluid composition comprising:
base oil in an oil phase;
water in an aqueous phase;
a rheology modifier comprising a layered double hydroxide;
an emulsifier comprising the formula R—CO—NH—R′—NH—R″—NH 2 ; and
one or more additives chosen from wetting agents, fluid-loss control additives, and weighting additives.

2. The oil-based drilling fluid composition of claim 1 , where the oil-based drilling fluid comprises Mg/Al-Myristate layered double hydroxide in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid.

3. The oil-based drilling fluid composition of claim 1 , where the oil-based drilling fluid comprises the amino amide having the formula R—CO—NH—R′—NH—R″—NH 2 in an amount of from 0.1 wt. % to 5 wt. % based on the total weight of the oil-based drilling fluid.

4. The oil-based drilling fluid composition of claim 1 , where the oil-based drilling fluid comprises one or more of:
the base oil in an amount of from 10 wt. % to 20 wt. % based on the total weight of the oil-based drilling fluid;
one or more wetting agents in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid;
one or more fluid-loss control additives in an amount of from 0.5 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid; or
one or more weighting additives in an amount of from 50 wt. % to 90 wt. % based on the total weight of the oil-based drilling fluid.

5. The oil-based drilling fluid composition of claim 1 , where the layered double hydroxide comprises a myristate.

6. The oil-based drilling fluid composition of claim 1 , where the layered double hydroxide comprises one or more of Aluminum cations or Magnesium cations.

7. The oil-based drilling fluid composition of claim 1 , where the layered double hydroxide is Mg/Al-Myristate layered double hydroxide.

8. A method for making an oil-based drilling fluid composition comprising:
mixing a base oil, a water-containing component, an emulsifier, and a rheology modifier to form an oil-based drilling fluid composition, where:
the oil-based drilling fluid composition comprises an oil phase comprising the base oil and an aqueous phase comprising the water;
the rheology modifier comprises a layered double hydroxide; and
the emulsifier comprises an amino amide having the formula R—CO—NH—R′—NH—R″—NH 2 .

9. The method of claim 8 , where the oil-based drilling fluid comprises Mg/Al-Myristate layered double hydroxide in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid.

10. The method of claim 8 , where the oil-based drilling fluid comprises the amino amide having the formula R—CO—NH—R′—NH—R″—NH 2 in an amount of from 0.1 wt. % to 5 wt. % based on the total weight of the oil-based drilling fluid.

11. The method of claim 8 , where the oil-based drilling fluid comprises one or more of:
the base oil in an amount of from 10 wt. % to 20 wt. % based on the total weight of the oil-based drilling fluid;
one or more wetting agents in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid;
one or more fluid-loss control additives in an amount of from 0.5 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid; or
one or more weighting additives in an amount of from 50 wt. % to 90 wt. % based on the total weight of the oil-based drilling fluid.

12. The method of claim 8 , the method further comprising mixing one or more additives chosen from wetting agents, fluid-loss control additives, and weighting additives with the base oil, the water-containing component, the emulsifier, and the rheology modifier.

13. The method of claim 8 , where the layered double hydroxide is Mg/Al-Myristate layered double hydroxide.

14. A method for drilling a subterranean well, the method comprising:
providing an oil-based drilling fluid composition, where the oil-based drilling fluid composition comprises:
base oil in an oil phase;
water in an aqueous phase;
rheology modifier comprising a layered double hydroxide;
an emulsifier comprising an amino amide having the formula R—CO—NH—R′—NH—R″—NH 2 , where R is a fatty acid alkyl group, R′ is an alkyl group, and R″ is an alkyl group; and
one or more additives chosen from wetting agents, fluid-loss control additives, and weighting additives; and

operating a drill in a wellbore in the presence of the oil-based drilling fluid composition.

15. The method of claim 14 , where the wellbore comprises one or more of:
a wellbore temperature greater than 300° F.;
a pressure greater than 10,000 ps; or
a surface temperature of 0° C. or less.

16. The method claim 14 , where the oil-based drilling fluid comprises Mg/Al-Myristate layered double hydroxide in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid.

17. The method claim 14 , where the oil-based drilling fluid comprises the amino amide having the formula R—CO—NH—R′—NH—R″—NH 2 in an amount of from 0.1 wt. % to 5 wt. % based on the total weight of the oil-based drilling fluid.

18. The method claim 14 , where the oil-based drilling fluid comprises one or more of:
the base oil in an amount of from 10 wt. % to 20 wt. % based on the total weight of the oil-based drilling fluid;
comprises one or more wetting agents in an amount of from 0.1 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid;
one or more fluid-loss control additives in an amount of from 0.5 wt. % to 2 wt. % based on the total weight of the oil-based drilling fluid; or
one or more weighting additives in an amount of from 50 wt. % to 90 wt. % based on the total weight of the oil-based drilling fluid.

19. The method claim 14 , where the layered double hydroxide comprises one or more of:
a myristate; or
one or more of Aluminum cations or Magnesium cations.

20. The method claim 14 , where the layered double hydroxide is Mg/Al-Myristate layered double hydroxide.

Assignees

• Saudi Arabian Oil Co
• Univ Durham
• M I Drilling Fluids Uk Ltd

Inventors

• Mohammed Musarrat Halima
• Whiting Andrew
• Al Batal Mona
• Veerabhadrappa Manohara Gudiyor
• Greenwell Hugh Christopher
• Hall John Adrian
• Alabedi Gasan Selman
• Hodder Michael Hayward

Classifications

• C09K8/506

  containing organic compounds · CPC title

• C09K8/032

  Inorganic additives · CPC title

• C09K8/34

  Organic liquids · CPC title

• C09K8/36 Primary

  Water-in-oil emulsions · CPC title