Method and system for quantitatively identifying sedimentary slope fold belt

By calculating the thickness of the target strata and introducing the concept of the strata thickness change rate, the problem of identifying sedimentary slope folds in oil and gas field exploration is solved, and the method of quantitatively identifying sedimentary slope folds is realized, which improves the accuracy and efficiency of oil and gas exploration.

CN119716966AActive Publication Date: 2025-03-28PETROCHINA CO LTD
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Patent Information

Application Number
CN202311244412.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-25
Publication Date
2025-03-28
Estimated Expiration
2043-09-25

AI Technical Summary

Technical Problem

In oil and gas field exploration, it is difficult for the existing technology to accurately identify the plane distribution of sedimentary slope fold belts, resulting in a low success rate of drilling of oil and gas exploration, which seriously restricts the progress of oil and gas exploration.

Method used

By calculating the thickness of the target strata using the seismic interpretation results and introducing the concept of the strata thickness change rate, the trend line of the sedimentary slope flexure band is determined to achieve quantitative identification of the sedimentary slope flexure band.

Benefits of technology

This method can visually display the distribution characteristics of the sedimentary slope flexure belt on the strata thickness change rate plan, quantitatively identify data such as the regional span of the sedimentary slope flexure belt, and improve the accuracy and efficiency of oil and gas exploration.

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Abstract

The invention relates to a method and system for quantitatively identifying a sedimentary slope fold belt, and belongs to the technical field of oil and gas field exploration and development. The method comprises the steps that based on basic data, a target stratum top and bottom time structure map is determined, and the basic data comprises oil exploration seismic data and drilling data; based on the target layer top and bottom time structure maps, determining a target layer stratum thickness map; and determining a trend line of the sedimentary slope fold zone based on the target stratum thickness map. According to the method, the influence of structural factors on the stratum thickness is fully considered, the concept of the stratum thickness change rate is introduced to fully display the distribution characteristics of the sedimentary slope break zone on the plane graph, and the obtained sedimentary slope break zone is visually displayed on the stratum thickness change rate plane graph; and data such as the regional span of the sedimentary slope fold belt can be quantitatively identified.
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