Systems and methods of oil sweetening and hydrogen production
AssigneeSaudi Arabian Oil Company
InventorsSimon A. Stewart, Serguey Viktorov Arkadakskiy
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Abstract
Provided herein are methods and systems of simultaneous oil sweetening and hydrogen production. The method includes introducing a sour oil stream containing hydrogen sulfide (H2S) from a source reservoir into a scavenging reservoir containing one or more types of reactive iron-bearing minerals, and contacting the sour oil stream with the one or more types of reactive iron-bearing minerals present in the scavenging reservoir, thereby generating a sweet oil stream having a low-reduced H2S content as compared to the sour oil stream and an iron sulfide scale deposited within the scavenging reservoir and forming a hydrogen gas cap in an upper portion of the scavenging reservoir beneath a cap rock seal.
Claims20
A method of simultaneous oil sweetening and hydrogen production, the method comprising:
- introducing a sour oil stream comprising hydrogen sulfide (H2S) from a source reservoir into a scavenging reservoir comprising one or more types of reactive iron-bearing minerals;
- contacting the sour oil stream with the one or more types of reactive iron-bearing minerals present in the scavenging reservoir, thereby generating a sweet oil stream having a reduced H2S content as compared to the sour oil stream and an iron sulfide scale deposited within the scavenging reservoir and forming a hydrogen gas cap in an upper portion of the scavenging reservoir beneath a cap rock seal;
- and
- flowing the sweet oil stream into a sweet oil storage unit via a sweet oil production well and flowing the hydrogen gas cap into a hydrogen storage unit via a hydrogen production well.
A system for simultaneous oil sweetening and hydrogen production, the system comprising:
- a source reservoir comprising a sour oil stream comprising hydrogen sulfide (H2S);
- a reservoir connector well configured to flow the sour oil stream from the source reservoir into a scavenging reservoir;
- the scavenging reservoir comprising one or more types of reactive iron-bearing minerals configured to react the H2S in the sour oil stream with the one or more types of reactive iron-bearing minerals to generate a sweet oil stream having a reduced H2S content as compared to the sour oil stream, an iron sulfide scale deposited within the scavenging reservoir, and a hydrogen gas cap in an upper portion of the scavenging reservoir beneath a cap rock seal;
- a sweet oil production well configured to flow the sweet oil stream;
- a hydrogen production well configured to flow the hydrogen gas cap;
- a water injection well configured to flow water into the source reservoir, thereby allowing the sour oil stream to flow from the source reservoir to the scavenging reservoir and supporting fluid movement within the scavenging reservoir and the source reservoir;
- and
- a surface-based remote sensing sensor.
Dependencies are inferred from the claim text.