Method for segmenting different strata series of stratified shale and identifying oiliness of stratified shale

Through the combined observation method of XRF mineral scanning and single polarization-fluorescence-laser confocal optical mirror, combined with chromatography-mass spectrometry analysis and FT-ICRMS technology, the problem of heterogeneity identification of layered shale medium-frame systems was solved, and the accurate prediction of shale oil desserts and the revelation of micro-transportation phenomena was achieved, reducing exploration risks and improving economic benefits.

CN120385709AActive Publication Date: 2025-07-29SANYA MARINE OIL & GAS RESEARCH INSTITUTE NORTHEAST PETROLEUM UNIVERSITY +1
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Patent Information

Application Number
CN202510885687.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-07-29
Estimated Expiration
2045-06-30

AI Technical Summary

Technical Problem

The prior art cannot effectively identify and quantify the heterogeneity of different strata systems in stratified shale, resulting in the inability to accurately locate locally enriched strata systems of shale oil and identify hydrocarbon micro-mobility phenomena, and ignore the differences in interlayer physical properties and hydrocarbon distribution laws.

Method used

The combined observation method of XRF mineral scanning and single polarization-fluorescence-laser confocal optical mirrors is adopted, combined with chromatography-mass spectrometry analysis and FT-ICRMS technology, and the accurate identification and segmentation of micron-scale layer system boundaries are achieved. The hydrocarbon distribution is observed through fluorescence microscope and laser confocal microscope, and the micro-transportation phenomenon of shale oil is analyzed in combination with data fusion.

Benefits of technology

Accurate prediction of shale oil desserts is achieved, reducing exploration risks, improving economic benefits, reducing ineffective drilling, and improving the success rate of single-well drilling.

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Abstract

The invention discloses a method for segmenting different strata series of stratified shale and identifying oiliness, and belongs to the field of oil-gas exploration. The invention discloses a strata division method based on XRF (X-Ray Fluorescence) mineral scanning and single polarization-fluorescence-laser confocal optical lens combined observation, which realizes accurate identification and segmentation of micron-sized strata boundaries of a layered rock core sample from different scales, and performs group component extraction on segmented independent strata. And carrying out chromatography-mass spectrometry analysis and FT-ICR MS analysis on the extracted saturated, aromatic, non-aromatic, leached and other family components. The TSF spectrum, light and heavy components, biomarker compounds, non-hydrocarbon compounds and other data obtained through the experiments are comprehensively analyzed, layering scale oiliness difference quantification and oil source comparison are achieved, and the shale oil micro-migration phenomenon is determined. The influence of the heterogeneity of the layered rock core sample on a result obtained by a traditional analysis method is overcome. According to the technology, direct evidences are provided for accurate prediction of shale oil desserts, exploration risks are reduced, and economic benefits are improved.
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