Using Pyrolysis Data to Correct for the Impact of Soluble Organic Matter-Filled Pores on Property Measurements Using Scanning Electron Microscopy Images of Source Rocks
AssigneeSaudi Arabian Oil Company
InventorsShannon L. Eichmann, David Jacobi, Poorna Srinivasan
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Abstract
A combination of scanning electron microscope data and pyrolysis data are used to correct for solid organic matter-containing pores in a source rock sample. The methods can yield corrected sample porosity estimates and/or kerogen content estimates.
Claims20
A method of determining an adjusted porosity of a source rock sample, the source rock sample comprising pores that contain soluble organic matter (SOM), the method comprising:
- using pyrolysis data for the source rock sample to correct the porosity data obtained from a scanning electron microscopy image of the source rock sample (ϕSEM) to determine the adjusted porosity (ϕAdj SEM) of the source rock sample,
- wherein the pyrolysis data comprise at least one member selected from the group consisting of a volume productivity index (PIvol) of the source rock sample and a corrected volume productivity index (PI_corrvol) of the source rock sample.
A method of determining an adjusted amount of organic matter from a scanning electron microscopy image of a source rock sample, the source rock sample comprising pores that contain soluble organic matter (SOM), the method comprising:
- using pyrolysis data for the source rock sample to correct the organic matter percentage obtained from a scanning electron microscopy image of the source rock sample to determine the adjusted amount of organic matter (%AdjOrg,SEM) in the source rock sample,
- wherein the pyrolysis data comprise at least one member selected from the group consisting of a volume productivity index (PIvol) of the source rock sample and a corrected volume productivity index (PI_corrvol) of the source rock sample.
Dependencies are inferred from the claim text.