Method for simultaneously producing offshore crude oil and sealing carbon dioxide

By designing the method of simultaneously performing crude oil production and carbon dioxide storage at offshore, the problem of carbon dioxide storage in old oil fields requires re-drilling, and the synchronization of crude oil extraction and carbon storage is achieved, improving economic and safety.

CN119825305AActive Publication Date: 2025-04-15DALIAN SHIPBUILDING INDUSTRY CO LTD
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Patent Information

Application Number
CN202411873827.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-04-15
Estimated Expiration
2044-12-19

AI Technical Summary

Technical Problem

When existing offshore carbon dioxide storage technology is implemented in old oil fields, it is necessary to re-drill, which increases costs and poses safety risks, such as the risk of accidents such as wellhead collapse or liquid gas eruption.

Method used

Design a method for the simultaneous operation of offshore crude oil production and carbon dioxide storage. By setting up multiple modules on the main deck of the hull, the synchronization of crude oil extraction and carbon dioxide storage is achieved. The crude oil extraction module collects crude oil in the submarine oil well through an outboard riser, and when necessary, fills supercritical carbon dioxide into the well to increase the pressure in the well. After the carbon dioxide is pressurized and heated to the supercritical state by multiple treatment modules, it is injected into the seabed carbon dioxide storage well.

Benefits of technology

The simultaneous progress of crude oil extraction and carbon sequestration is achieved, avoiding the risks brought about by secondary drilling of waste oil wells, and improving the economy and safety of offshore carbon sequestration operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

According to the method for simultaneously carrying out offshore crude oil production and carbon dioxide sequestration, a crude oil extraction module collects crude oil in seabed oil wells and sends the crude oil to a crude oil separation module, and after extraction of a certain oil well is finished, the oil well serves as a carbon dioxide sequestration well. The liquid carbon dioxide receiving module receives liquid carbon dioxide conveyed by a liquid carbon dioxide transport ship through a liquid carbon dioxide pump, gas-liquid mixed carbon dioxide is fed into the gas-liquid mixed carbon dioxide pressurizing module, pressurizing and heating operation is carried out, and supercritical carbon dioxide is formed. And the supercritical carbon dioxide injection module is used for distributing the supercritical carbon dioxide and injecting the supercritical carbon dioxide into a seabed carbon dioxide storage well. Crude oil extraction and carbon sequestration are synchronously carried out, seabed oil wells and related pipelines are utilized to the maximum degree, and the economical efficiency of offshore carbon sequestration operation is improved. The risk caused by secondary drilling of the abandoned oil well is avoided, and the safety of offshore carbon sequestration operation is improved.
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Citation Information

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