Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

Patent metadata

Field	Value
Publication number	US-2018223156-A1
Application number	US-201715489927-A
Country	US
Kind code	A1
Filing date	Apr 18, 2017
Priority date	Feb 3, 2017
Publication date	Aug 9, 2018
Grant date	—

Abstract

A wellbore servicing fluid comprises an aqueous base fluid, one or more alkali metal or alkali earth metal salts, at least one visocisifier, and a filtration control package. The filtration control package may comprise a carboxylic acid and an ethoxylated alcohol compound. Alternatively, the filtration control package may comprise a polyethylene glycol. The carboxylic acid may have from 8 to 20 carbon atoms. The ethoxylated alcohol compound may have a general formula R—(OCH2CH2)x—OH, where R is a hydrocarbon having from 10 to 16 atoms and x is an integer from 6 to 9. The ethoxylated alcohol compound may have a hydrophilic-lipophilic balance of from 8.0 to 16.0. The polyethylene glycol may have a mass average molar mass (Mw) of less than or equal to 1500 daltons.

First claim

1 . A filtration control package comprising:
at least one carboxylic acid having from 8 to 20 carbon atoms; and an ethoxylated alcohol compound having a general formula R—(OCH 2 CH 2 ) x —OH; where:
R is a hydrocarbon group having from 10 to 16 carbon atoms;
x is an integer from 6 to 9; and
the ethoxylated alcohol compound has a hydrophilic-lipophilic balance value of from 8.0 to 16.0.

2 . The filtration control package of claim 1 , comprising from 30 wt. % to 70 wt. % of at least one carboxylic acid having from 8 to 20 carbon atoms.

3 . The filtration control package of claim 1 , comprising from 30 wt. % to 70 wt. % of an ethoxylated alcohol compound.

4 . The filtration control package of claim 1 , where the at least one carboxylic acid has from 14 to 20 carbon atoms.

5 . The filtration control package of claim 1 , where the at least one carboxylic acid has from 16 to 18 carbon atoms.

6 . The filtration control package of claim 1 , where R is a hydrocarbon group having from 12 to 14 carbon atoms.

7 . The filtration control package of claim 1 , where R is a branched isotridecyl hydrocarbon group.

8 . The filtration control package of claim 1 , where x is 8.

9 . The filtration control package of claim 1 , where the ethoxylated alcohol compound has a hydrophilic-lipophilic balance of from 10.0 to 14.0.

10 . The filtration control package of claim 1 , where the ethoxylated alcohol compound has a hydrophilic-lipophilic balance value of from 12.5 to 13.5.

11 . A filtration control package comprising:
from 30 wt. % to 70 wt. % of at least one carboxylic acid having from 8 to 20 carbon atoms; and from 30 wt. % to 70 wt. % of polyethylene glycol; where the polyethylene glycol has a mass average molar mass (M w ) less than or equal to 1500 daltons.

12 . The filtration control package of claim 11 , where the at least one carboxylic acid has from 12 to 20 carbon atoms.

13 . The filtration control package of claim 11 , where the at least one carboxylic acid has from 16 to 18 carbon atoms.

14 . The filtration control package of claim 11 , where the polyethylene glycol has a mass average molar mass (M w ) less than or equal to 800 daltons.

15 . A wellbore servicing fluid comprising:
an aqueous base fluid; at least one viscosifier; and a filtration control package comprising:
at least one carboxylic acid having from 8 to 20 carbon atoms;
an ethoxylated alcohol compound having a general formula, R—(OCH 2 CH 2 )x-OH; where:
R is a hydrocarbon group having from 10 to 16 carbon atoms;
an integer from 6 to 9; and
the ethoxylated alcohol compound has an hydrophilic-lipophilic balance value of from 8.0 to 16.0; and

where the carboxylic acid and ethoxylated alcohol compound are present in the wellbore servicing fluid in an amount no more than 30 pounds per barrel of wellbore servicing fluid each.

16 . (canceled)

17 . The wellbore servicing fluid of claim 15 , where the carboxylic acid has from 14 to 20 carbon atoms.

18 . The wellbore servicing fluid of claim 15 , where the carboxylic acid has from 16 to 18 carbon atoms.

19 . The wellbore servicing fluid of claim 15 , where R is a hydrocarbon group having from 12 to 14 carbon atoms.

20 . The wellbore servicing fluid of claim 15 , where R is a branched isotridecyl hydrocarbon group.

21 . The wellbore servicing fluid of claim 15 , where x is 8.

22 . The wellbore servicing fluid of claim 15 , where the at least one viscosifier comprises xanthan gum polymer.

23 . The wellbore servicing fluid of claim 15 , where the ethoxylated alcohol compound has a hydrophilic-lipophilic balance value of from 10.0 to 14.0.

24 . The wellbore servicing fluid of claim 15 , where the ethoxylated alcohol compound has a hydrophilic-lipophilic balance value of from 12.5 to 13.5.

25 . The wellbore servicing fluid of claim 15 , where the aqueous base fluid is fresh water.

26 . The wellbore servicing fluid of claim 15 , where the carboxylic acid and ethoxylated alcohol compound are present in the wellbore servicing fluid in an amount no more than 20 pounds per barrel of wellbore servicing fluid each.

27 . A wellbore servicing fluid comprising:
an aqueous base fluid; at least one viscosifier; and a filtration control package comprising a polyethylene glycol with a mass average molar mass (M w ) less than or equal to 1500 daltons; where the amount of polyethylene glycol does not exceed 30 pounds per barrel of wellbore servicing fluid.

28 . The wellbore servicing fluid of claim 27 , further comprising a carboxylic acid having from 8 to 20 carbon atoms.

29 . The wellbore servicing fluid of claim 28 , where the carboxylic acid has from 14 to 20 carbon atoms.

30 . The wellbore servicing fluid of claim 28 , where the carboxylic acid has from 16 to 18 carbon atoms.

31 . The wellbore servicing fluid of claim 27 , where the polyethylene glycol has a mass average molar mass (M w ) less than or equal to 800 daltons.

32 . The wellbore servicing fluid of claim 27 , where the polyethylene glycol is present in the wellbore servicing fluid in an amount no more than 20 pounds per barrel of wellbore servicing fluid.

33 . The wellbore servicing fluid of claim 28 , where the carboxylic acid is present in the wellbore servicing fluid in an amount no more than 30 pounds per barrel of wellbore servicing fluid.

34 . The wellbore servicing fluid of claim 28 , where the carboxylic acid is present in the wellbore servicing fluid in an amount no more than 20 pounds per barrel of wellbore servicing fluid.

35 . The wellbore servicing fluid of claim 27 , where the at least one viscosifier comprises xanthan gum polymer.

36 . (canceled)

37 . A method of maintaining the structure of a wellbore, the method comprising:
adding the wellbore servicing fluid of claim 15 to a wellbore; and operating a drill string in the presence of the wellbore servicing fluid, maintaining the structure of the wellbore.

38 . The wellbore servicing fluid of claim 15 , further comprising one or more alkali metal or alkali earth metal salts.

39 . The wellbore servicing fluid of claim 27 , further comprising one or more alkali metal or alkali earth metal salts.

40 . The filtration control package of claim 1 , further comprising a mixture that comprises the at least one carboxylic acid having from 8 to 20 carbon atoms and a second carboxylic acid having from 8 to 20 carbon atoms.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Yami Abdullah
• Wagle Vikrant
• Albahrani Hussain
• Safran Ali
• Alhareth Nasser

Classifications

• C09K8/514

  of natural origin, e.g. polysaccharides, cellulose (C09K8/512 takes precedence) · CPC title

• C09K8/035

  Organic additives · CPC title

• C10N2020/02

  Viscosity; Viscosity index · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10N2020/017

  Specific gravity or density · CPC title