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US 11,885,790 B2Granted
Source productivity assay integrating pyrolysis data and X-ray diffraction data
AssigneeSaudi Arabian Oil Company
InventorDavid Jacobi
Life of this patent
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Abstract
The disclosure relates to a source productivity assay integrating pyrolysis data and X-ray diffraction data.
Claims17
A method, comprising:
- performing pyrolysis on a source rock, wherein performing pyrolysis on the source rock comprises heating the source rock in an oven;
- obtaining pyrolysis data on the source rock based on performing pyrolysis on the source rock;
- determining a hydrocarbon generative potential (S2) of kerogen in the source rock from the pyrolysis data;
- determining a total organic carbon (TOC) content (in weight %) of the source rock from the pyrolysis data;
- determining a maturity of the reservoir (% Ro) from S2 and TOC;
- determining a ratio of an oil specific gravity of the source rock to a density of the source rock (API) using the equation
- API=Ln(% Ro/0.2534)/.0345;
- obtaining x-ray diffraction (XRD) data for the source rock;
- and
- determining an additional parameter from the pyrolysis data, the X-ray diffraction (XRD) data, or both.
7 more elements
A method of evaluating a source rock, the method comprising:
- performing pyrolysis on the source rock, wherein performing pyrolysis on the source rock comprises heating the source rock in an oven;
- obtaining pyrolysis data for the source rock based on performing pyrolysis on the source rock;
- determining a hydrocarbon generative potential (S2) of kerogen in the source rock from the pyrolysis data;
- determining a total organic carbon (TOC) content (in weight %) of the source rock from the pyrolysis data;
- determining a maturity of the reservoir (% Ro) from S2 and TOC;
- and
- determining a ratio of an oil specific gravity of the source rock to a density of the source rock (API) using the equation
- API=Ln(% Ro/0.2534)/.0345,
- wherein % Ro is a maturity of the source rock.
6 more elements
A method of evaluating a source rock, the method comprising:
- performing pyrolysis on the source rock, wherein performing pyrolysis on the source rock comprises heating the source rock in an oven;
- obtaining pyrolysis data for the source rock based on performing pyrolysis on the source rock;
- determining a hydrocarbon generative potential (S2) of kerogen in the source rock from the pyrolysis data;
- determining a total organic carbon (TOC) content (in weight %) of the source rock from the pyrolysis data;
- determining a maturity of the reservoir (% Ro) from S2 and TOC;
- and
- determining a ratio of saturated fluids to aromatic fluids in the source rock (Sat/Aro) using the equation
- Sat/Aro=(% Ro/.7842)(1/0.3571).
5 more elements
A method of evaluating a source rock, the method comprising:
- performing pyrolysis on the source rock, wherein performing pyrolysis on the source rock comprises heating the source rock in an oven;
- obtaining pyrolysis data for the source rock based on performing pyrolysis on the source rock;
- determining a hydrocarbon generative potential (S2) of kerogen in the source rock from the pyrolysis data;
- determining a total organic carbon (TOC) content (in weight %) of the source rock from the pyrolysis data;
- determining a maturity of the reservoir (% Ro) from S2 and TOC;
- determining a ratio of an oil specific gravity of the source rock to a density of the source rock (API) using the equation
- API=Ln(% Ro/0.2534)/.0345;
- and
- determining a percent loss of a C15+ fraction (% Loss n−C15+) of bitumen of the source rock using the equation
- % Loss n−C15+=API/7.2379(1/.4508).
7 more elements
A method of evaluating a source rock, the method comprising:
- performing pyrolysis on the source rock, wherein performing pyrolysis on the source rock comprises heating the source rock in an oven;
- obtaining pyrolysis data for the source rock based on performing pyrolysis on the source rock;
- determining a distillable hydrocarbon (S1) of kerogen in the source rock from the pyrolysis data;
- determining a total organic carbon (TOC) content (in weight %) of the source rock from the pyrolysis data;
- and
- determining a corrected milligrams of distillable hydrocarbon of the source rock per gram of the source rock (S1corr) using the equation
- S1corr=S1o/(1−(% Loss n−C15+/100)),
- wherein S1o is an original value of the milligrams of distillable hydrocarbon of the source rock per gram of the source rock and % Loss n−C15+ is a percent loss of a C15+ fraction of bitumen of the source rock.
5 more elements
Dependencies are inferred from the claim text.