# US 2014/0151050 A1 · Injection System for Enhanced Oil Recovery

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- Number: US 2014/0151050 A1
- Document ID: US20140151050A1
- Status: Published application
- Kind: A1
- Application number: 13/692,501
- Filed: 2012-12-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Assignees: Dow Global Technologies LLC
- Inventors: Aaron W. Sanders; Terry A. Mann
- Web page: https://patentgrep.com/patent/US20140151050A1

## CPC

- E21B 43/166: {Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium (CO2 injection E21B43/164; steam injection E21B43/24)}
- E21B 21/062: {by mixing components}
- E21B 43/164: {Injecting CO2 or carbonated water (in combination with organic material C09K8/594)}
- Y02P 90/70: Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
- Y10T 137/86027: Electric
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method of enhancing oil recovery by providing a mobile surfactant injection system including a storage tank, means for injecting surfactant into a scCO2 stream, and a feedback control for maintaining a constant concentration of surfactant in a gas stream, the method including the steps of creating a fluid comprising the surfactant and the injection gas, and injecting the fluid into the oil field strata.

## Claims

### Claim 1

A mobile enhanced oil recovery apparatus for creating a wellbore fluid comprising a gas and a liquid, said apparatus comprising:
a. a storage tank for containing a liquid, said liquid to be injected into a gas stream;
b. a pump for delivering liquid to said gas stream;
c. means for injecting a liquid into a gas stream; and
d. a feedback control for maintaining a constant concentration of liquid in the gaseous steam.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein said liquid comprises a surfactant.

### Claim 3

The apparatus of any of the preceding claims, wherein said gas comprises supercritical CO2.

### Claim 4

The apparatus of any of the preceding claims, wherein said storage tank has a capacity ranging from about 500 to about 6,000 gallons.

### Claim 5

The apparatus of any of the preceding claims, wherein said storage tank comprises a thermal element for heating and cooling.

### Claim 6

The apparatus of any of the preceding claims, wherein said injecting means comprises on injection quill.

### Claim 7

The apparatus of any of the preceding claims, wherein said feedback control maintains the surfactant in the wellbore fluid at a concentration ranging from about 100 to 5,000 ppm.

### Claim 8

A method of enhancing oil recovery by creating a wellbore fluid for injection into an oil field by a enhanced oil recovery apparatus, said apparatus comprising a storage tank, means for injecting surfactant into a scCO2 stream, and a feedback control for maintaining a constant concentration of surfactant in a gas stream said method comprising the steps of:
a. injecting said surfactant into a gas stream at a controlled rate;
b. creating a fluid comprising said gas and surfactant; and
c. injecting said fluid into said oil field strata.

### Claim 9 (depends on 8)

The method of claim 8, wherein said surfactant comprises a nonionic surfactant.

### Claim 10 (depends on 8, 9)

The method of claim 8 or 9, wherein said gas comprises CO2.

### Claim 11 (depends on 9, 10)

The method of claim 9 or 10, wherein said nonionic surfactant is contained in a tank having a capacity ranging from about 500 to 6,000 gallons said tank having a thermal element.

### Claim 12 (depends on 8, 9, 10, 11)

The method of claim 8, 9, 10 or 11, wherein said liquid comprises a nonionic surfactant which is injected into said gas with an injection quill.

### Claim 13 (depends on 8, 9, 10, 11, 12)

The method of claim 8, 9, 10, 11 or 12, wherein said liquid comprises a nonionic surfactant which is injected into said gas stream at a concentration ranging from about 100 ppm to 5000 ppm in the wellbore fluid.

### Claim 14 (depends on 8, 9, 10, 11, 12)

The method of claim 8, 9, 10, 11 or 12 wherein said fluid comprises a nonionic surfactant which is injected into said gas by an injection quill.