Low-phosphorus and non-phosphorus gelled hydrocarbon well treatment fluids

Patent metadata

Field	Value
Publication number	US-2017355899-A1
Application number	US-201715617818-A
Country	US
Kind code	A1
Filing date	Jun 8, 2017
Priority date	Jun 13, 2016
Publication date	Dec 14, 2017
Grant date	—

Abstract

Gelled fluids include a gellable organic solvent, an aluminum crosslinking compound, and a mutual solvent. The gelled fluids may be prepared by combining an aluminum crosslinking compound and a first volume of a gellable organic solvent to form a pre-solvation mixture; gelling the pre-solvation mixture to form a pre-solvated gel; combining the pre-solvated gel with a formulation fluid to form a gellable mixture, the formulation fluid comprising a second volume of the gellable organic solvent; and gelling the gellable mixture to form the gelled fluid.

First claim

1 . A method of preparing a gelled fluid, the method comprising:
combining an aluminum crosslinking compound and a first volume of a gellable organic solvent to form a pre-solvation mixture; gelling the pre-solvation mixture to form a pre-solvated gel; combining the pre-solvated gel with a formulation fluid to form a gellable mixture, the formulation fluid comprising a second volume of the gellable organic solvent; and gelling the gellable mixture to form the gelled fluid.

2 . The method of claim 1 , in which the aluminum crosslinking compound comprises an aluminum alkanoate.

3 . The method of claim 2 , in which the aluminum alkanoate comprises aluminum octoate.

4 . The method of claim 1 , in which the aluminum crosslinking compound is aluminum octoate.

5 . The method of claim 1 , in which the gellable organic solvent is a hydrocarbon liquid that forms crosslinked gel with the aluminum crosslinking compound.

6 . The method of claim 1 , in which the gellable organic solvent is chosen from diesel oil, crude oil, kerosene, paraffinic oil, refined oil, mineral oil, shale oil, unconventional oil, tight oil, liquefied natural gas, vegetable oil, animal oil or a combination thereof.

7 . The method of claim 1 , further comprising adding a mutual solvent to the first volume of the organic solvent.

8 . The method of claim 7 , in which the mutual solvent is an organic compound that increases a solvation rate of the aluminum crosslinking compound in the gellable organic solvent.

9 . The method of claim 7 , in which the mutual solvent is chosen from glycols, glycol ethers, or combinations thereof.

10 . The method of claim 7 , in which the mutual solvent is chosen from ethylene glycol, propylene glycol, alkyl ethers of ethylene glycol, alkyl ethers of propylene glycol, or combinations thereof.

11 . The method of claim 7 , in which the mutual solvent is chosen from ethylene glycol, propylene glycol, ethylene glycol mono-butyl ether, 2-butoxyethanol, propylene glycol n-butyl ether, diethylene glycol butyl ether, ethylene glycol monoacetate, butyl carbitol, triethylene glycol monoethyl ether, 1,1′-oxybis(2-propanol), triethylene glycol monomethyl ether, or combinations thereof.

12 . The method of claim 7 , in which the mutual solvent comprises 2-butoxyethanol.

13 . The method of claim 1 , in which gelling the pre-solvation mixture comprises solvating the aluminum alkanoate compound in the pre-solvation mixture.

14 . The method of claim 13 , in which gelling the gellable mixture comprises heating the gellable mixture until the pre-solvated gel is formed, or mixing the gellable mixture until the pre-solvated gel is formed, or heating and mixing the gellable mixture until the pre-solvated gel is formed.

15 . The method of claim 13 , in which solvating the aluminum alkanoate compound in the pre-solvation mixture comprises heating the pre-solvation mixture until the gelled fluid is formed, or mixing the pre-solvation mixture until the gelled fluid is formed, or heating and mixing the pre-solvation mixture until the gelled fluid is formed.

16 . The method of claim 1 , in which the formulation fluid further comprises a phosphate ester, an iron (III) crosslinking compound, an aluminum crosslinking compound, or a combination thereof.

17 . The method of claim 1 , further comprising, before gelling the gellable mixture, adding at least one additional gel-forming compound to the formulation fluid or the gellable mixture, the at least one additional gel-forming compound being chosen from phosphate esters, iron (III) crosslinking compounds, aluminum crosslinking compounds, or a combination thereof.

18 . The method of claim 17 , in which adding additional gel-forming compounds to the gellable mixture comprises:
adding from 0.1 to 20% by weight of the phosphate ester of the gellable organic solvent in the gellable mixture; or adding from 0.1 to 20% by weight of the iron (III) crosslinking compound of the gellable organic solvent in the gellable mixture; or adding from 0.1 to 20% by weight of the aluminum crosslinking compounds of the gellable organic solvent in the gellable mixture; or a combination thereof.

19 . The method of claim 1 , further comprising adding unsolvated aluminum alkanoate to the gellable mixture before gelling the gellable mixture.

20 . The method of claim 1 , wherein the gelled fluid comprises from 0.1% by weight to 20% by weight aluminum alkanoate, based on the total weight of the gelled fluid.

21 . (canceled)

22 . A gelled fluid comprising:
a gellable organic solvent; from 0.1% to 20% by weight, based on the total weight of the gelled fluid, of an aluminum alkanoate cros slinking compound; and from 0.1% to 5% by weight, based on the total weight of the gelled fluid, of a mutual solvent that increases a solvation rate of the aluminum alkanoate crosslinking compound in the gellable organic solvent.

23 . The gelled fluid of claim 22 , in which the gellable organic solvent is chosen from diesel oil, crude oil, kerosene, paraffinic oil, refined oil, mineral oil, shale oil, unconventional oil, tight oil, liquefied natural gas, vegetable oil, animal oil, or combinations thereof.

24 . The gelled fluid of claim 22 , in which the mutual solvent is chosen from glycols, glycol ethers, or combinations thereof.

25 . The gelled fluid of claim 22 , in which the mutual solvent is chosen from ethylene glycol, propylene glycol, alkyl ethers of ethylene glycol, alkyl ethers of propylene glycol, or combinations thereof.

26 . The gelled fluid of claim 22 , in which the mutual solvent is chosen from ethylene glycol, propylene glycol, ethylene glycol mono-butyl ether, 2-butoxyethanol, propylene glycol n-butyl ether, diethylene glycol butyl ether, ethylene glycol monoacetate, butyl carbitol, triethylene glycol monoethyl ether, 1,1′-oxybis(2-propanol), triethylene glycol monomethyl ether, or combinations thereof.

27 . The gelled fluid of claim 22 , in which the mutual solvent comprises 2-butoxyethanol.

28 . The gelled fluid of claim 22 , in which the aluminum alkanoate crosslinking compound is aluminum octoate.

29 . A method of treating a subterranean formation, the method comprising:
introducing a gelled fluid into a subterranean formation, the gelled fluid comprising:
a gellable organic solvent;
from 0.1% to 20% by weight, based on the total weight of the gelled fluid, of an aluminum alkanoate crosslinking compound; and
from 0.1% to 5% by weight, based on the total weight of the gelled fluid, of a mutual solvent that increases a solvation rate of the aluminum alkanoate crosslinking compound in the gellable organic solvent.

Assignees

• Saudi Arabian Oil Co

Inventors

• Li Leiming
• Al-Muntasheri Ghaithan A
• Liang Feng
• Ozden Sehmus

Classifications

• C09K8/82

  Oil-based compositions (C09K8/64 takes precedence) · CPC title

• C09K8/426

  for plugging · CPC title

• C09K8/03

  Specific additives for general use in well-drilling compositions · CPC title

• C09K8/64 Primary

  Oil-based compositions · CPC title

• C09K8/685 Primary

  containing cross-linking agents · CPC title