Method and system for water cut sensing in an oil-water flow
AssigneeSaudi Arabian Oil Company
InventorsMhanna Mhanna, Muhammad Arsalan, Aamir Farooq
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Abstract
A method for water cut sensing in an oil-water flow involves obtaining a composite absorbance spectrum of the oil-water flow, obtaining a reference absorbance spectrum of a reference fluid, computing a slope for data points associated with the composite absorbance spectrum of the oil-water flow vs corresponding data points associated with the reference absorbance spectrum of the known fluid, and based on the slope, determining the water cut of the oil-water flow.
Claims20
A method for water cut sensing in an oil-water flow, the method comprising:
- obtaining a composite absorbance spectrum of the oil-water flow;
- obtaining a reference absorbance spectrum of a reference fluid;
- computing data points, wherein each of the data points is for a specific absorbance spectrum wavelength and is based on an absorbance of the absorbance spectrum of the oil-water flow versus an absorbance of the absorbance spectrum of the reference fluid;
- computing a best-fit slope for the data points;
- and
- based on the best-fit slope, determining the water cut of the oil-water flow.
A system for water cut sensing in an oil-water flow, the system comprising:
- a laser-based spectroscopy sensor;
- and
- a computer system that:
- obtains a composite absorbance spectrum of the oil-water flow from the laser-based spectroscopy sensor,
- obtains a reference absorbance spectrum of a reference fluid,
- computes data points, wherein each of the data points is for a specific absorbance spectrum wavelength and is based on an absorbance of the absorbance spectrum of the oil-water flow versus an absorbance of the absorbance spectrum of the reference fluid,
- computes a best-fit slope for the data points, and
- based on the best-fit slope, determines the water cut in the oil-water flow.
A non-transitory computer readable medium (CRM) storing computer readable program code for water cut sensing in an oil-water flow, the computer readable program code causing a computer system to:
- obtain a composite absorbance spectrum of the oil-water flow;
- obtain a reference absorbance spectrum of a reference fluid;
- compute data points, wherein each of the data points is for a specific absorbance spectrum wavelength and is based on an absorbance of the absorbance spectrum of the oil-water flow versus an absorbance of the absorbance spectrum of the reference fluid,
- compute a best-fit slope for the data points;
- and
- based on the best-fit slope, determine the water cut of the oil-water flow.
Dependencies are inferred from the claim text.