Spectroscopic analysis of rocks
AssigneeChevron U.S.A. Inc.
InventorsKenneth Thomas Ratcliffe, Luke Morgan, Paul Montgomery, Timothy B. Fischer
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Abstract
The present disclosure concerns methods of identifying and quantifying constituent phases in rock samples based on spectroscopic measurements, methods of determining values of pyrolysis parameters for rock samples based on spectroscopic measurements, and methods of determining amounts of organic phases in rock samples based on spectroscopic measurements, as well as associated computer programs, computer-readable media, data carrier signals and data sets, and methods of compiling associated data sets for use in such methods.
Claims24
A method comprising identifying a constituent phase in a rock sample based on a spectroscopic measurement obtained from the rock sample and determining an amount of the constituent phase in the rock sample based on the spectroscopic measurement obtained from the rock sample, wherein determining the amount of the constituent phase in the rock sample comprises:
- obtaining a spectroscopic measurement from the rock sample;
- and
- determining the amount of the constituent phases in the rock sample based on the spectroscopic measurement and a spectroscopic calibration model which defines a relationship between spectroscopic measurements and constituent phase amounts for rock samples.
A method comprising:
- providing spectroscopic measurement data obtained from a plurality of reference rock samples;
- providing corresponding constituent phase compositional measurement data obtained from the same plurality of reference rock samples, wherein constituent phase compositional measurement data obtained from a reference rock sample comprising measurements of an amount of one or more constituent phases in the reference rock sample is indicative of an amount of one or more constituent phases in the reference rock sample;
- and
- fitting a spectroscopic calibration model to the spectroscopic measurement data and the corresponding constituent phase compositional measurement data, wherein the spectroscopic calibration model defines a relationship between the spectroscopic measurement data and the corresponding constituent phase compositional measurement data for the plurality of reference rock samples.
A method comprising determining a value of a pyrolysis parameter for a rock sample based on a spectroscopic measurement obtained from the rock sample wherein determining the value of the pyrolysis parameter for the rock sample comprises:
- obtaining a spectroscopic measurement from the rock sample;
- and
- determining the value of the pyrolysis parameter for the rock sample based on the spectroscopic measurement and a spectroscopic calibration model which defines a relationship between spectroscopic measurements and values of the pyrolysis parameter for rock samples.
A method comprising:
- providing spectroscopic measurement data obtained from a plurality of reference rock samples;
- providing corresponding pyrolysis parameter measurement data obtained from the same plurality of reference rock samples;
- and
- fitting a spectroscopic calibration model to the spectroscopic measurement data and the corresponding pyrolysis parameter measurement data, wherein the spectroscopic calibration model defines a relationship between the spectroscopic measurement data and the corresponding pyrolysis parameter measurement data for the plurality of reference rock samples.
A method comprising determining an amount of an organic phase in a rock sample based on a spectroscopic measurement obtained from the rock sample wherein determining the amount of the organic phase in the rock sample comprises:
- obtaining a spectroscopic measurement from the rock sample;
- and
- determining the amount of the organic phase in the rock sample based on the spectroscopic measurement and a spectroscopic calibration model which defines a relationship between spectroscopic measurements and organic phase amounts for rock samples.
A method comprising:
- providing spectroscopic measurement data obtained from a plurality of reference rock samples;
- providing corresponding organic phase compositional measurement data obtained from the same plurality of reference rock samples;
- and
- fitting a spectroscopic calibration model to the spectroscopic measurement data and the corresponding organic phase compositional measurement data, wherein the spectroscopic calibration model defines a relationship between the spectroscopic measurement data and the corresponding organic phase compositional measurement data for the plurality of reference rock samples.
Dependencies are inferred from the claim text.