Fluid injection for dehydrogenation
AssigneeSaudi Arabian Oil Company
InventorsSampath K Bommareddy, Harun Ates
Life of this patent
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Abstract
In-situ pyrolysis of methane includes heating, with a heater of a fluid control system, a fluid composition including hydrogen gas to a first temperature greater than or equal to 300 degrees Celsius. The heated fluid composition is directed to a subterranean reservoir, where it is disposed in contact with a reservoir fluid to cause methane pyrolysis of the reservoir fluid. A catalyst can be disposed in the subterranean reservoir to receive the heated fluid composition and promote contact between the heated fluid composition and the reservoir fluid to cause the methane pyrolysis.
Claims18
A method for in-situ pyrolysis of methane, the method comprising:
- heating, with a heater of a fluid control system at a surface facility of a well system, a fluid composition comprising hydrogen gas and helium to a first temperature greater than or equal to 300 degrees Celsius;
- directing the heated fluid composition to a subterranean reservoir;
- disposing the heated fluid composition in contact with a reservoir fluid in the subterranean reservoir to cause methane pyrolysis of the reservoir fluid, wherein disposing the heated fluid composition in contact with the reservoir fluid comprises transmitting heat from the helium of the fluid composition obtained at the surface facility to the reservoir fluid;
- separating, via a membrane system, hydrogen gas and helium from a remainder of a production fluid from a production well;
- and
- directing the separated hydrogen gas and helium to the fluid composition at the heater.
A fluid injection system for a well, the fluid injection system comprising:
- a fluid control system comprising a heater and a membrane system, the heater configured to heat a fluid composition comprising hydrogen gas and helium to a first temperature that is greater than or equal to 300 degrees Celsius, and the membrane system configured to separate hydrogen gas and helium from a remainder of a production fluid from a production well and supply the separated hydrogen gas and helium to the fluid composition;
- an injection fluid pathway between the fluid control system and an injection tubing at a well head at a well site, the injection fluid pathway configured to direct a flow of the heated fluid composition from the fluid control system to the injection tubing;
- and
- a catalyst disposed in a subterranean reservoir and fluidly connected to the injection fluid pathway to receive the heated fluid composition, the catalyst configured to promote contact between the heated fluid composition and a reservoir fluid in the subterranean reservoir to cause methane pyrolysis and transmission of heat from the helium to the reservoir fluid.
A well system, comprising:
- a fluid control system at a surface of an injection well, the fluid control system comprising a heater configured to heat a fluid composition comprising hydrogen gas and helium to a first temperature that is between 300 degrees Celsius and 500 degrees Celsius, and comprising a membrane system configured to separate hydrogen gas and helium from a remainder of a production fluid from a production well and supply the separated hydrogen gas and helium to the fluid composition;
- and
- an injection fluid pathway extending between the fluid control system and a subterranean reservoir, the injection well comprising a wellbore extending to the subterranean reservoir, and the injection fluid pathway configured to direct a flow of the heated fluid composition from the fluid control system to the subterranean reservoir and into contact with a reservoir fluid in the subterranean reservoir to cause in-situ methane pyrolysis.
Dependencies are inferred from the claim text.