# US 2024/0200426 A1 · Bottom-up sequestration of carbon dioxide in negative geologic closures

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- Number: US 2024/0200426 A1
- Document ID: US20240200426A1
- Status: Published application
- Kind: A1
- Application number: 18/082,114
- Filed: 2022-12-15
- Published: 2024-06-20
- Earliest claimed: 2022-12-15
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Markus Albertz; Hasmukh A. Patel
- Web page: https://patentgrep.com/patent/US20240200426A1

## CPC

- E21B 41/0064: {Carbon dioxide sequestration (storing fluids in porous layers B65G5/005)}
- E21B 43/164: {Injecting CO2 or carbonated water (in combination with organic material C09K8/594)}
- E21B 47/003: Determining well or borehole volumes
- Y02C 20/40: of CO2
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]

## Abstract

Methods for storing carbon dioxide in a subsurface formation include identifying a plurality of negative geologic closures in the subsurface formation. The dimensions of the plurality of negative geologic closures are characterized. Layers of subsurface formation in the vicinity the negative geologic closures are characterized. One of the negative geologic closures is selected for bottom-up storage of carbon dioxide based on the characterized dimensions and layers.

## Claims

### Claim 1

A method of storing carbon dioxide in a subsurface formation, the method comprising:
identifying a plurality of negative geologic closures in the subsurface formation;
characterizing dimensions of the plurality of negative geologic closures;
characterizing layers of the subsurface formation in the vicinity the negative geologic closures;
selecting one of the negative geologic closures based on the characterized dimensions and layers;
positioning an injection well at a bottom layer of the selected negative geologic closure; and
discharging a fluid comprising carbon dioxide through the injection well into the selected negative geologic closure;
in response to determining that the bottom layer of the selected negative geologic closure has reached a carbon dioxide saturation pressure:
selecting a second layer of the negative geologic closure higher than the bottom layer;
isolating a portion of the injection well below the second layer; and
discharging the fluid comprising carbon dioxide through the injection well into the second layer of the selected negative geologic closure.

### Claim 2 (depends on 1)

The method of claim 1, wherein the selected negative geologic closure includes multiple layers of the subsurface formation.

### Claim 3

(canceled)

### Claim 4

(canceled)

### Claim 5 (depends on 1)

The method of claim 1, wherein discharging the fluid comprising carbon dioxide comprises discharging a carbon dioxide—water mixture.

### Claim 6 (depends on 5)

The method of claim 5, wherein discharging the carbon dioxide—water mixture comprises discharging a carbon dioxide—brine mixture.

### Claim 7 (depends on 1)

The method of claim 1, wherein discharging the fluid comprising carbon dioxide comprises discharging liquid carbon dioxide.

### Claim 8 (depends on 1)

The method of claim 1, wherein discharging the fluid comprising carbon dioxide comprises injecting carbon dioxide at a pressure between 14.5 and 35,000 psi.

### Claim 9 (depends on 1)

The method of claim 1, wherein identifying the plurality of negative geologic closures in the subsurface formation comprises identifying the plurality of negative geologic closures in the subsurface formation based at least in part on seismic data.

### Claim 10 (depends on 9)

The method of claim 9, further comprising performing a seismic survey.

### Claim 11 (depends on 1)

The method of claim 1, wherein selecting one of the negative geologic closures comprises selecting a negative geologic closure with a temperature between 50 and 75° C.

### Claim 12 (depends on 1)

The method of claim 1, wherein selecting one of the negative geologic closures comprises selecting a negative geologic closure where the pressure in the subsurface surrounding formation is between 2,000 and 10,000 psi.

### Claim 13 (depends on 1)

The method of claim 1, wherein selecting one of the negative geologic closures comprises selecting a negative geologic closure with a porosity of between 5 and 25%.

### Claim 14 (depends on 13)

The method of claim 13, wherein selecting one of the negative geologic closures comprises selecting a negative geologic closure with a permeability between 5-50 millidarcy.

### Claim 15 (depends on 1)

The method of claim 1, further comprising perforating casing of the injection well at the second layer of the selected negative geologic closure.

### Claim 16 (depends on 1)

The method of claim 1, wherein isolating the portion of the injection well downhole from the second layer comprises using packers to isolate the portion of the injection well.

### Claim 17 (depends on 1)

The method of claim 1, wherein isolating the portion of the injection well downhole from the second layer comprises filling the injection well with cement.