Method and system for calculating activity rate of oil reservoir group level fault
The deposition time limit of the oil layer group is calculated by the Michter astronomical cyclometry method and the true fault drop is obtained through the formation inclination correction, which solves the problem of inaccurate determination of the deposition time limit of the oil layer group and the true fault drop in the prior art, and improves the accuracy of the calculation of fault activity rate.
CN119719554APending Publication Date: 2025-03-28PETROCHINA CO LTD
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Patent Information
- Application Number
- CN202311249147.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-26
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
The prior art is difficult to accurately determine the deposition time limit of the oil layer group and the true fault drop, resulting in inaccurate calculation of fault activity rates.
Method used
The deposition time limit of the oil layer group was calculated by the Mi's astronomical cyclometry method, and the true fault drop was obtained through formation inclination correction, thereby calculating the fault activity rate at the oil layer group level.
Benefits of technology
The accuracy of fault activity rate calculation is improved, and the analysis of the corresponding fault activity of higher-level formations is realized, providing higher-level and more refined technical methods for oilfield fault activity analysis.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a calculation method and system for the activity rate of an oil reservoir group level fault. The calculation method comprises the steps that natural gamma curves of all oil reservoir groups of a preset target layer are sampled at equal intervals; performing spectral analysis on the selected natural gamma curve, and determining that the natural gamma curve has Mie astronomical cycle information; performing filtering analysis on the selected natural gamma curve to obtain a filtering result of the Mie's astronomical cycle information, and calculating the deposition time limit of the stratum of the corresponding oil reservoir group; obtaining the stratum apparent thickness with stable hanging wall and footwall near the fault, performing dip angle correction on the stratum apparent thickness to obtain the true thickness of the hanging wall and footwall stratum of the fault, and calculating the fall of the true fault; and based on the obtained true fault fall and the stratum deposition time limit of the corresponding oil reservoir group, calculating the activity rate of the oil reservoir group level fault. According to the method, the activity of the fault corresponding to a higher-level stratum is analyzed, the calculation precision of the activity rate of the fault is improved, and a higher-level and finer technical method is provided for the analysis of the fracture activity of an oil field.
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