# US 2014/0190690 A1 · Oil formulation for preventing water penetration in underground formations

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- Number: US 2014/0190690 A1
- Document ID: US20140190690A1
- Status: Published application
- Kind: A1
- Application number: 14/151,094
- Filed: 2014-01-09
- Published: 2014-07-10
- Earliest claimed: 2007-07-05
- Assignees: Rhodia Operations
- Inventors: Arnaud CADIX
- Web page: https://patentgrep.com/patent/US20140190690A1

## CPC

- C09K 8/584: characterised by the use of specific surfactants
- C09K 8/502: Oil-based compositions
- C09K 8/565: Oil-based compositions
- C09K 8/64: Oil-based compositions
- E21B 43/16: Enhanced recovery methods for obtaining hydrocarbons
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

The present invention relates to the use of an oil formulation in the field of the oil industry, in particular for the prevention of water penetration. The formulation according to the invention is in particular intended to be injected into underground formations, such as injection wells or production wells.

## Claims

### Claim 1

A liquid oil formulation comprising:
(a) a compound comprising at least two isocyanate functional groups;
(b) a surfactant; and
(c) an aromatic oil capable of dissolving compounds (a) and (b).

### Claim 2 (depends on 1)

The formulation of claim 1, wherein compound (a) is isophorone diisocyanate, toluene diisocyanate, biphenyl diisocyanate, dimethoxy-4,4′-biphenyl diisocynate, dimethyl-4,4′-biphenyl diisocyanate, 1,3-bis (isocyanatomethyl) benzene, phenyl diisocyanate, tolylene diisocyanate, diisocynatohexane, diisocyanatooctane, diisocyanatobutane, xylene diisocyanate, octamethylene diisocyanate, or phenylene diisocyanate.

### Claim 3 (depends on 1)

The formulation of claim 1, wherein compound (a) is a diisocyanate polymer.

### Claim 4 (depends on 1)

The formulation of claim 1, wherein the concentration of compound (a) ranges from 1 to 15% by weight.

### Claim 5 (depends on 1)

The formulation of claim 1, wherein the surfactant (b) comprises:
fatty acids;
amides derived from fatty acids;
hydrophobic acrylate/vinyl pyrrolidone diblock copolymers;
linear or branched ethylene oxide/propylene oxide random or block copolymers;
sorbitan esters;
ethoxylated alcohols;
ethoxylated alkyl phenols
ionic surfactants;
zwitterionic surfactants;
polymeric emulsifying surfactants;
or mixtures thereof.

### Claim 6 (depends on 1)

The formulation of claim 1, wherein the surfactant (b) comprises a mixture of fatty acids.

### Claim 7 (depends on 1)

The formulation of claim 1, wherein the concentration of surfactant (b) ranges from 0.5 to 20% by weight.

### Claim 8 (depends on 1)

The formulation of claim 1, wherein the oil (c) comprises an organic oil, a mineral oil, a vegetable oil, or mixtures thereof.

### Claim 9 (depends on 1)

The formulation of claim 1, wherein said the oil (c) comprises saturated or unsaturated fatty acids, saturated or unsaturated fatty acid esters, organic solvents, paraffinic mineral oils, naphthenic oils, palm oil, rapeseed oil, linseed oil, sunflower oil, or mixtures thereof.

### Claim 10 (depends on 1)

A method of manufacturing a formulation according to claim 1, wherein said compound (a), said surfactant (b), and said aromatic oil (c) are mixed together.

### Claim 11 (depends on 1)

A method of treating a subterranean formation, comprising injecting into said formation a formulation according to claim 1.

### Claim 12 (depends on 11)

The method of claim 11, wherein said formulation is injected into said formation by an injection well and/or by a production well.

### Claim 13

(canceled)

### Claim 14

A water-in-oil emulsion comprising a continuous phase which comprises an aromatic oil and wherein the water/oil interface is at least partially covered with a polyurea-type polymer obtained by hydrolysis and condensation of a compound comprising at least two isocyanate functional groups and wherein said aromatic oil is capable of dissolving said compound comprising at least two isocyanate functional groups and a surfactant.

### Claim 15 (depends on 14)

A method of manufacturing the water-in-oil emulsion of claim 14, wherein a liquid oil formulation is brought into contact with an aqueous medium, said formulation comprising:
(a) a compound comprising at least two isocyanate functional groups;
(b) a surfactant; and
(c) an aromatic oil capable of dissolving compounds (a) and (b).

### Claim 16 (depends on 1)

The formulation of claim 1, wherein at least one of said isocyanate functional groups in said compound (a) is blocked.

### Claim 17 (depends on 3)

The formulation of claim 3, wherein compound (a) is a diisocyanate trimer.

### Claim 18 (depends on 17)

The formulation of claim 17, wherein compound (a) is a isophorone diisocyanate trimer or a hexamethylene diisocyanate trimer.

### Claim 19 (depends on 5)

The formulation of claim 5 wherein said fatty acids are in their acid form or in a form completely or partially neutralized by a base soluble in said oil.

### Claim 20 (depends on 1)

The formulation of claim 1, wherein said formulation is adapted to form a water-in-oil emulsion when contacted by an aqueous medium.

### Claim 21 (depends on 11)

The method of claim 11, further comprising contacting an aqueous medium in the subterranean formation with said formulation, wherein the formulation and the aqueous medium form a water-in-oil emulsion comprising a water/oil interface, wherein the water/oil interface is at least partially covered with a polyurea-type polymer resulting from hydrolysis and condensation of the compound comprising at least two isocyanate functional groups.