Packer fluids including ethylene glycol

Patent metadata

Field	Value
Publication number	US-2025333634-A1
Application number	US-202418651003-A
Country	US
Kind code	A1
Filing date	Apr 30, 2024
Priority date	Apr 30, 2024
Publication date	Oct 30, 2025
Grant date	—

Abstract

The present disclosure relates to packer fluids including a hydrocarbon and ethylene glycol, to methods for treating a wellbore with such packer fluids, and to wellbores including such packer fluids disposed in an annulus thereof.

First claim

1 . A method of treating a wellbore, comprising:
providing a packer fluid comprising a hydrocarbon and ethylene glycol, present in the packer fluid in a weight ratio of about 10:1; and injecting the packer fluid into an annulus of the wellbore.

2 . (canceled)

3 . (canceled)

4 . The method of claim 1 , wherein the hydrocarbon comprises an oil.

5 . The method of claim 4 , wherein the oil comprises a synthetic oil, diesel, kerosene, a mineral oil, or any combination thereof.

6 . The method of claim 4 , wherein the oil comprises diesel.

7 . The method of claim 1 , wherein the packer fluid further comprises water.

8 . The method of claim 7 , wherein the packer fluid comprises an oil to water ratio (OWR) of about 40:60 to about 90:10.

9 . The method of claim 7 , wherein the packer fluid comprises:
about 50 wt % to about 95 wt % hydrocarbon; about 1 wt % to about 45 wt % ethylene glycol; and about 1 wt % to about 45 wt % water.

10 . The method of claim 7 , wherein the packer fluid comprises;
about 50 wt % to about 95 wt % hydrocarbon; about 2 wt % to about 15 wt % ethylene glycol; and about 3 wt % to about 35 wt % water.

11 . The method of claim 1 , wherein the packer fluid further comprises a weighting agent.

12 . The method of claim 11 , wherein the weighting agent comprises barite, manganese tetroxide, marble dust, or any combination thereof.

13 . The method of claim 12 , wherein the weighting agent comprises barite.

14 . The method of claim 12 , wherein the weighting agent comprises marble dust.

15 . The method of claim 14 , wherein an average particle size of the marble dust is about 1 μm to about 100 μm.

16 . The method of claim 14 , wherein an average particle size of the marble dust is about 5 μm to about 50 μm.

17 . The method of claim 11 , wherein the packer fluid comprises:
about 20 wt % to about 70 wt % hydrocarbon; about 1 wt % to about 35 wt % ethylene glycol; about 1 wt % to about 35 wt % water; and about 25 wt % to about 73 wt % weighting agent; wherein the hydrocarbon and the ethylene glycol are present in a weight ratio of about 10:1.

18 . The method of claim 11 , wherein the packer fluid comprises:
about 20 wt % to about 55 wt % hydrocarbon; about 3 wt % to about 15 wt % ethylene glycol; about 7 wt % to about 25 wt % water; and about 35 wt % to about 65 wt % weighting agent.

19 . The method of claim 1 , wherein the packer fluid comprises less than about 5 wt % of a salt.

20 . The method of claim 1 , wherein the packer fluid is substantially free from salt.

21 . The method of claim 1 , wherein the annulus comprises a brine before injecting the packer fluid, and injecting the packer fluid displaces the brine from the annulus.

22 . The method of claim 1 , wherein the annulus comprises a tubing-casing anulus.

23 . The method of claim 1 , wherein the annulus comprises a casing-casing anulus.

24 . A method of preventing corrosion in a wellbore, comprising:
providing a packer fluid comprising a hydrocarbon and ethylene glycol, present in the packer fluid in a weight ratio of about 10:1; and contacting a metal surface of the wellbore with the packer fluid.

25 . The method of claim 24 , wherein the metal surface comprises a surface of an annulus of the wellbore.

26 . A wellbore comprising:
an annulus; a packer disposed within the annulus; and a packer fluid disposed within the annulus and adjacent the packer; wherein the packer fluid comprises a hydrocarbon and ethylene glycol, present in the packer fluid in a weight ratio of about 10:1.

27 . The wellbore of claim 26 , wherein the packer fluid further comprises water.

28 . The wellbore of claim 27 , wherein the packer fluid comprises:
about 50 wt % to about 95 wt % hydrocarbon; about 1 wt % to about 45 wt % ethylene glycol; and about 1 wt % to about 45 wt % water.

29 . The method of claim 26 , wherein the packer fluid further comprises a weighting agent.

30 . The method of claim 29 , wherein the packer fluid comprises:
about 25 wt % to about 70 wt % hydrocarbon; about 1 wt % to about 35 wt % ethylene glycol; about 1 wt % to about 35 wt % water; and about 25 wt % to about 73 wt % weighting agent.

Assignees

• Saudi Arabian Oil Co

Inventors

• Aljohar Abdulwahab S
• Alsafran Ali
• Wagle Vikrant
• Alhelal Abdulaziz
• Abushullaih Hamzah Nader
• Al-Yami Abdullah Saleh Hussain

Classifications

• E21B33/12

  Packers; Plugs (used for cementing E21B33/134, E21B33/16) · CPC title

• C09K8/502 Primary

  Oil-based compositions · CPC title

• C09K8/54

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title