Portable system to capture and store liquid carbon dioxide
AssigneeSaudi Arabian Oil Company
InventorsSaad AlMutairi, Khalid Mohammed M. Alruwaili
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Abstract
A hydraulic fracturing operation is performed in a wellbore formed in a subterranean zone. A wellhead is installed at an entrance to the wellbore. Liquid CO2 is flowed through a pipeline located at a surface and fluidically coupled to the wellhead. The liquid CO2 is flowed into the wellbore through the wellhead to perform the hydraulic fracturing. The hydraulic fracturing operation including flowing of the liquid CO2 through the pipeline to the wellhead is stopped. A portion of the liquid CO2 is withdrawn from within the pipeline into a liquid CO2 storage container, which is a portable system designed to capture and store liquid CO2 and that is fluidically coupled to the pipeline at the surface.
Claims15
A method comprising:
- while performing a hydraulic fracturing operation in a wellbore formed in a subterranean zone, a wellhead installed at an entrance to the wellbore, flowing, through a pipeline located at a surface and fluidically coupled to the wellhead, liquid CO2 into the wellbore through the wellhead to perform the hydraulic fracturing;
- stopping the hydraulic fracturing operation including stopping flow of the liquid CO2 through the pipeline to the wellhead;
- and
- withdrawing a portion of the liquid CO2 within the pipeline into a liquid CO2 storage container fluidically coupled to the pipeline at the surface.
A method comprising:
- (a) perforating a cemented liner of a first stage in a wellbore;
- (b) after perforating the cemented liner, flowing slickwater fluid into the wellbore to initiate and propagate a fracture in the wellbore;
- (c) after initiating and propagating the fracture, flowing proppant slurry into the wellbore;
- (d) after flowing proppant slurry into the wellbore, flowing liquid CO2 into the wellbore;
- after flowing the liquid CO2 into the wellbore, withdrawing a portion of the liquid CO2 into a liquid CO2 container;
- and
- maintaining the liquid CO2 in the liquid CO2 container in a liquid state.
Dependencies are inferred from the claim text.