一种基于扭摆工具面控制钻孔轨迹的方法
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西北核技术研究所

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A method for controlling drilling trajectory based on torsion pendulum tool surface
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Northwest Institute of Nuclear Technology

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    摘要:

    针对定向钻孔轨迹特点,分析了多种轨迹计算模型误差、工具面角计算误差及其对轨迹纠偏效果的影响规律,提出了一种工具面角控制方法,并在某钻场成功试用。现场应用结果表明:某钻遇地层,按照单测点逐个定量评估原则,最小误差模型与地层有强相关性,孔深3109m~3185m自然曲线法计算误差最小,孔深3185m~3278m圆柱螺线法计算误差最小,整个孔段只有部分离散测点最小曲率法误差最小;按照整孔段误差最小测点数和绝对平均误差综合评估原则,优先沿用最小曲率法。分析了钻遇地层自然造斜对工具面扭摆的影响规律,有依据地选用轨迹计算模型,精准控制钻孔轨迹,有效避免主观随意选用测斜计算方法或造斜工具等问题。

    Abstract:

    Based on the characteristics of directional drilling trajectories, various trajectory calculation model errors, tool face angle calculation errors, and their impact on trajectory correction effects were analyzed. A tool face angle control method was proposed and successfully tested at a certain drilling site. The on-site application results show that when a certain drilling encounters a formation, according to the principle of quantitative evaluation of single measurement points one by one, the minimum error model has a strong correlation with the formation. The natural curve method has the smallest calculation error for hole depths of 3109m to 3185m, and the cylindrical spiral method has the smallest calculation error for hole depths of 3185m to 3278m. Only some discrete measurement points in the entire hole section have the smallest error in the minimum curvature method; According to the principle of comprehensive evaluation based on the minimum number of measurement points and absolute average error of the entire hole section, the minimum curvature method is preferred. Analyzed the impact of natural inclination during drilling on tool face torsion, selected a trajectory calculation model based on evidence, accurately controlled the drilling trajectory, and effectively avoided subjective and arbitrary selection of inclinometer calculation methods or inclination tools.

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  • 收稿日期:2025-05-05
  • 最后修改日期:2025-07-13
  • 录用日期:2025-07-31
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