贵州永温大坪矿区小直径螺杆钻探轨迹纠斜应用

Application of trajectory correction technology in small-diameter screw drilling at Yongwen Daping Mining Area， Guizhou

摘要:

针对贵州永温大坪磷矿区钻探施工中钻孔轨迹偏移问题，系统开展了纠斜技术的应用研究。通过优化钻孔轨迹控制方案，设计分阶段动态调控策略（如“先降斜后稳方位”），结合?73 mm弯螺杆钻具、JTL-40GX型光纤陀螺测斜定向仪，实现了孔斜角与方位角的精准协同控制。研究结果表明：SJK04、SJK05、SJK06钻孔的终孔偏移量分别为9.79、5.91、11 m，分别占设计允许值的67%、36%、64%，均满足工程精度要求（偏移量≤1%）。其中，SJK05钻孔通过定向纠斜钻进，孔斜角从4.93°降至1.68°（降幅65.9%），方位角调整幅度达161°。本研究为复杂地层钻探的轨迹控制提供了技术参考，展示了分阶段调控策略的工程适用性。

Abstract:

This study systematically investigated the application of deviation correction technologies to address borehole trajectory deviations encountered during drilling operations in the Yongwen Dapeng phosphate mining area. By optimizing the wellbore trajectory control plan and implementing a phased dynamic regulation strategy （“first reducing inclination， then stabilizing azimuth” e.g.）， combined with a ?73 mm bent screw drilling tool and a JTL-40GX fiber-optic gyroscopic inclinometer for directional measurement， precise coordinated control of the well deviation angle and azimuth angle was achieved. The results demonstrate that the final deviations of the SJK04， SJK05， and SJK06 boreholes were 9.79， 5.91， and 11m， respectively， corresponding to 67%， 36%， and 64% of the permitted design values， which meets the engineering accuracy requirements （deviation limit ≤1%）. Notably， directional drilling in the SJK05 borehole reduced the well deviation angle from 4.93° to 1.68° （a reduction of 65.9%） and adjusted the azimuth angle by 161°. This research provides a technical reference for trajectory control in complex stratigraphic drilling and demonstrates the engineering applicability of the phased regulation strategy.