Adjusting method and device for drilling track of horizontal well

By establishing a horizontal well geological steering model and conducting azimuth resistivity boundary detection while drilling, and adjusting the drilling trajectory in conjunction with seismic profiles, the problem of trajectory adjustment after the formation of the formation in traditional geological steering technology has been solved, thereby improving the drilling success rate of the target formation and reducing the risk.

CN122106400APending Publication Date: 2026-05-29CHINA PETROCHEMICAL CORP +3
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Patent Information

Application Number
CN202411740971.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional geological steering technology in horizontal well drilling suffers from shallow instrument detection depth and insufficient azimuth sensitivity, resulting in the trajectory only being able to be adjusted after the formation has been exposed, causing leakage in the horizontal section of the reservoir and making it difficult to achieve proactive optimization and adjustment and improve the drilling rate of the target formation.

Method used

By comparing the formations of the standard well and the well to be drilled, a geological steering model for the horizontal well is established. By comparing the resistivity and gamma curves while drilling, the trajectory is adjusted in real time using the azimuth resistivity boundary detection curve while drilling, and pre-adjustment is carried out in combination with seismic profiles to optimize the drilling trajectory.

Benefits of technology

It enables real-time trajectory adjustment during drilling, improving the target formation encounter rate and reducing drilling risks, while also reducing the uncertainty of trajectory adjustment.

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Abstract

The invention discloses a horizontal well drilling trajectory adjusting method and device. Firstly, a standard well used for conducting stratigraphic comparison with a to-be-drilled well is determined, and a horizontal well geosteering model is established in combination with geological data and drilling engineering data; the resistivity while drilling and the gamma curve while drilling of the current well are compared with a logging curve of a standard well, and the vertical depth of a target point is calculated; in combination with real-time response of a while-drilling azimuth resistivity boundary detection curve, determining a landing point of a target stratum, and entering the stratum at a proper hole drift angle; a horizontal well geosteering model while drilling simulation curve is fitted with a current well actual drilling curve, and the relative position relation between a well drilling track and a stratum interface is determined; by carrying out while-drilling azimuth resistivity boundary detection rapid inversion, the stratum interface azimuth and the distance from the track to the interface are determined in real time, and horizontal section drilling track adjustment is guided; the position of the track is judged in an auxiliary mode by combining logging data and directional actual drilling characteristics, sand body distribution and the stratum change trend are predicted by combining the regional seismic section, and the drilling track is pre-adjusted.
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