Deriving interfacial tension from fourier-transform infrared spectroscopy
AssigneeSchlumberger Technology Corporation
InventorsMohammed AL-HAMAD, Wael ABDALLAH, Azizah ALRADHWAN
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Abstract
The present disclosure is directed to an improved process that measures IFT of petroleum reservoir fluids (i.e., crude oil) using Fourier-Transform Infrared Spectroscopy (FTIR) measurements. FTIR spectra of a petroleum reservoir fluid sample are measured and processed to generate FTIR data that characterizes or accounts for the surface-active species of the petroleum reservoir fluid sample. The resulting FTIR data is input to a predefined correlation function that calculates IFT of the petroleum reservoir fluid sample given the FTIR data. This new technique helps minimize the time for experiment preparation and stabilization.
Claims25
A method comprising:
- preparing or obtaining a petroleum reservoir fluid sample;
- operating an FTIR spectrometer to measure FTIR spectra of the petroleum reservoir fluid sample;
- processing the measured FTIR spectra of the petroleum reservoir fluid sample to obtain FTIR data that characterizes or accounts for surface-active species of the petroleum reservoir fluid sample;
- using the FTIR data as input to a predefined correlation function that calculates a value of interfacial tension of the petroleum reservoir fluid sample;
- and
- storing or outputting the calculated value of interfacial tension of the petroleum reservoir fluid sample for characterizing the petroleum reservoir fluid sample.
A method comprising:
- preparing or obtaining a live oil sample;
- measuring fluid properties of the live oil sample;
- preparing or obtaining a dead oil sample corresponding to the live oil sample;
- operating an FTIR spectrometer to measure FTIR spectra of the dead oil sample;
- processing the measured FTIR spectra of the dead oil sample to obtain FTIR data that characterizes surface active species of the dead oil sample;
- using the FTIR data as input to a predefined first correlation function that calculates a value of interfacial tension of the dead oil sample;
- using the value of interfacial tension of the dead oil sample and the fluid properties of the live oil sample as input to a predefined second correlation function that calculates a value of interfacial tension of the live dead oil sample to petroleum reservoir fluid sample;
- and
- storing or outputting the calculated value of interfacial tension of the live oil sample for characterizing the live oil sample.
Dependencies are inferred from the claim text.