While-drilling in-situ strength calculation method based on well-seismic fusion information and medium

By combining seismic data with drilling engineering data, the quantitative relationship between rock mechanics parameters and drilling parameters is established, and the problem of difficulty in the evaluation of stratigraphic parameters in traditional drilling in traditional drilling has been solved. Safety and efficiency.

CN119358241AActive Publication Date: 2025-01-24CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
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Patent Information

Application Number
CN202411393694.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-08
Publication Date
2025-01-24
Estimated Expiration
2044-10-08

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Abstract

The invention relates to a while-drilling in-situ strength calculation method based on well-seismic fusion information, and the method comprises the steps: 1, constructing an initial mechanical parameter calculation model of a to-be-drilled stratum according to drilled data and seismic data; 2, according to the initial mechanical parameter calculation model, geomechanical basic parameters of a to-be-drilled stratum in front of a drill bit are obtained; 3, calculating geomechanical strength parameters according to the geomechanical basic parameters; 4, according to the mechanical strength parameters, the stratum in-situ strength is calculated; and 5, according to the stratum in-situ strength, correction is conducted in combination with well drilling data, and the in-situ strength while drilling under different working conditions is obtained. According to the method, seismic data and drilling engineering data are combined, the quantitative relation between rock mechanics parameters and while-drilling parameters is established, and the while-drilling in-situ strength can be rapidly obtained under different working conditions in combination with the Mohr-Coulomb strength criterion and experimental analysis correction.
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