Method and apparatus for determining effective porosity of a shale oil reservoir

By acquiring and analyzing well logging data, the total organic carbon content and inorganic framework mineral composition of kerogen were calculated, solving the problem that the influence of kerogen was not considered in the existing technology, realizing the accurate calculation of shale oil reservoir porosity and improving the calculation accuracy.

CN121454639BActive Publication Date: 2026-07-24RICHFIT INFORMATION TECH +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202411552105.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-31
Publication Date
2026-07-24
Estimated Expiration
2044-10-31

AI Technical Summary

Technical Problem

Existing technologies fail to effectively consider the influence of organic mineral kerogen when calculating the porosity of shale oil reservoirs, especially in the absence of nuclear magnetic resonance logging data, resulting in insufficient accuracy in porosity calculations.

Method used

By acquiring target logging data, the total organic carbon content of kerogen is calculated using natural gamma spectroscopy logging data. Combined with elemental full-spectrum logging data or conventional logging data, the inorganic framework mineral composition and clay content are analyzed, the density of the mixed inorganic mineral framework is calculated, and finally, the effective porosity is accurately calculated by combining the formation density and clay content.

Benefits of technology

In the absence of nuclear magnetic resonance logging data, it improves the accuracy and precision of shale oil reservoir porosity calculation, and can better reflect the influence of the organic and inorganic mineral skeleton of the actual formation on porosity.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application relates to the technical field of oil exploration, and provides a method and device for determining effective porosity of a shale oil reservoir. The method comprises the following steps: obtaining target well logging data to obtain formation density and total organic carbon content of a target formation; determining whether the target well logging data comprises element full spectrum logging data; if yes, performing normalization analysis on the element full spectrum logging data, and if not, performing combined analysis on preset well logging data in the target well logging data to obtain inorganic framework mineral component content information and clay content of the target formation; calculating mixed inorganic mineral framework density according to the inorganic framework mineral component content information; and calculating effective porosity of the target formation by using the formation density, the total organic carbon content of the dry kerogen, the mixed inorganic mineral framework density and the clay content. According to the embodiment of the application, the influence of organic and inorganic mineral frameworks on porosity can be considered, so that the calculation precision of the effective porosity of the shale oil reservoir is improved.
Need to check novelty before this filing date? Find Prior Art