A method for quantitatively calculating occurrence form of glauconite in glauconite sandstone

By establishing a volumetric physical model of glauconite sandstone and a volumetric physical model of dynamic characteristic points, and constructing a parallelogram chart, the problem of quantitative calculation of glauconite occurrence forms was solved, the accuracy of reservoir porosity and oil saturation calculations was improved, and the guidance for oil and gas field exploration was enhanced.

CN122197255APending Publication Date: 2026-06-12CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2024-12-11
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

The lack of quantitative calculation methods for glauconite occurrence in existing technologies affects the accuracy of reservoir porosity calculations and makes it difficult to establish high-precision reservoir parameter models.

⚗Method used

By establishing a volumetric physical model of glauconite sandstone, a volumetric physical model of dynamic characteristic points is constructed. A parallelogram chart is constructed using mud volume, density curves, neutron curves, and photoelectric absorption cross sections. The relative positions of logging data points in the chart are studied, and a set of dynamic logging response equations for quantitatively calculating the occurrence form of glauconite is established.

🎯Benefits of technology

It improves the accuracy of reservoir porosity and oil saturation calculations, enhances the identification of reservoir parameters and the ability to predict oil and gas enrichment areas, and guides oil and gas field exploration and development.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to oil and gas field exploration technology field, particularly to a kind of quantitative calculation method of glauconite occurrence form in glauconite sandstone, comprising: the rock volume physical model of glauconite sandstone is established;The volume physical model of dynamic characteristic point is constructed;Dynamic characteristic point includes logging data point M, matrix sandstone point A, argillaceous structure glauconite point B, double glauconite point C and dispersed glauconite sandstone point D, and the pore volume, argillaceous volume and mineral skeleton volume of each dynamic characteristic point are same;Using argillaceous volume, density curve, neutron curve and photoelectric absorption cross section, construct parallelogram chart based on dynamic characteristic point;By studying the relative position of any logging data point M in each parallelogram chart, the quantitative calculation of glauconite sandstone reservoir parameter is realized. Through the present calculation method, the influence of pore fluid on reservoir porosity calculation can be greatly reduced.
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