Method and device for measuring gas saturation of shale reservoir
By generating the target density curve and gas-containing indicator curve, combined with the density logging and total organic carbon content curve of the shale reservoir, the problem of inaccurate calculation of gas-containing saturation in the shale reservoir in the prior art is solved, and a more accurate gas-containing saturation reflection and reservoir evaluation are achieved.
CN119920350APending Publication Date: 2025-05-02YANGTZE UNIVERSITY
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Patent Information
- Application Number
- CN202411992506.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-05-02
AI Technical Summary
Technical Problem
When the existing calculation of the gas saturation of shale reservoirs based on non-electrical logging information, the calculation results cannot accurately reflect the gas saturation.
Method used
By obtaining the skeleton density curve, density logging curve and total organic carbon content curve of the shale reservoir, the target density curve and gas-containing indicator curve are generated based on the difference of these curves, and finally the gas-containing indicator curve is normalized to obtain the gas-containing saturation curve.
Benefits of technology
This method can accurately reflect the gas saturation of the shale reservoir, peel off the influence of the skeleton and organic matter, and provide more accurate reservoir evaluation and reserve calculation.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a shale reservoir gas saturation measuring method and device, and belongs to the technical field of shale gas exploration, the method comprises the following steps: obtaining a skeleton density curve, a density logging curve and a total organic carbon content curve of a shale reservoir; a target density curve is obtained according to the difference value of the skeleton density curve and the density logging curve; according to a difference value between the target density curve and the total organic carbon content curve, obtaining a gas-containing indication curve; and carrying out normalization processing on the gas-bearing indication curve to obtain a gas saturation curve. According to the gas saturation curve obtained through calculation, the influence of a framework and organic matter is stripped, and the gas saturation can be accurately reflected.
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