Method and system for analyzing an earth sample of a geological formation
AssigneeSchlumberger Technology Corporation
InventorsMichael Herron, Mary Ellen Loan
Life of this patent
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Abstract
The disclosure relates to a method for analyzing earth samples of a geological formation, comprising: performing a Fourier Transform InfraRed (FTIR) spectrometry measurement on an earth sample collected in the formation by: Irradiating the sample with infrared energy Measuring a spectrum representative of the infrared energy absorbed by the earth sample, analyzing the measured spectrum and obtaining from the analyzed measured spectrum a reconstructed spectrum corresponding to a combination of a plurality of standard spectra representative of elements contained in the earth sample, based on the measured spectrum and on the reconstructed spectrum, detecting a tar layer in the geological formation.
Claims20
Method for analyzing at least an earth sample of a geological formation, comprising:
- Performing a Fourier Transform InfraRed (FTIR) spectrometry measurement on an earth sample collected in the formation by:
- Irradiating the sample with infrared energy
- Measuring a spectrum representative of the infrared energy absorbed by the sample,
- Analyzing the measured spectrum and obtaining from the analyzed measured spectrum a reconstructed spectrum corresponding to a combination of a plurality of standard spectra representative of elements contained in the earth sample,
- Based on the measured spectrum and on the reconstructed spectrum, detecting a tar layer in the geological formation.
The method of claim 6, wherein obtaining the mineral reconstructed spectrum includes selecting a portion of the total reconstructed spectrum, corresponding to a combination of a plurality of standard spectra representative of minerals of the earth and organic matter contained in the earth sample, due to the standard spectra representative of minerals.
The method of claim 17, comprising plotting the ratio as a function of depth.
A system for analyzing an earth sample of a geological formation comprising:
- a Fourier Transform InfraRed (FTIR) spectrometry measurement apparatus for:
- irradiating an earth sample with infrared energy
- Measuring a spectrum representative of the infrared energy absorbed by the earth sample,
- A calculator for:
- Analyzing the measured spectrum and obtaining from the analyzed measured spectrum a reconstructed spectrum corresponding to a combination of a plurality of standard spectra representative of elements contained in the earth sample,
- Based the measured spectrum and on the reconstructed spectrum, detecting a tar layer in the geological formation
A computer program, comprising machine-readable instructions for:
- Receive a measured spectrum obtained from a Fourier Transform InfraRed (FTIR) spectrometry measurement on an earth sample of a geological formation,
- Analyzing the measured spectrum and obtaining from the analyzed measured spectrum a reconstructed spectrum corresponding to a combination of a plurality of standard spectra representative of elements contained in the earth sample,
- Based on the measured spectrum and the reconstructed spectrum, detecting a tar layer in the geological formation.
Dependencies are inferred from the claim text.