| 郭伟,穆元红,段英龙,陈启平,张平顺.基于改进密集轨迹算法的不同地质岩心钻探偏差修正[J].矿产勘查,2025,16(11):2483-2488 |
| 基于改进密集轨迹算法的不同地质岩心钻探偏差修正 |
| Correction of drilling deviation in different geological rock cores based on improved dense trajectory algorithm |
| 投稿时间：2024-03-21 |
| DOI：10.20008/j.kckc.202511009 |
| 中文关键词: 改进密集轨迹算法 地质岩心 钻探偏差 偏差修正 |
| 英文关键词: improve the dense trajectory algorithm geological core drilling deviation deviation correction |
| 基金项目:本文受青海省地质矿产勘查开发局2023年局第二批地质勘查项目([2023]35号)资助。 |
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| 中文摘要: |
| 在钻探过程中，存在钻孔轨迹偏离预定目标和岩心取样不完整或失真问题，导致钻探偏差变化率较大，修正效果不佳。为此，提出基于改进密集轨迹算法的不同地质岩心钻探偏差修正。采用卸压平衡原理，针对不同地质岩心条件确定了有效的钻孔深度，探究钻探方位角，引入改进密集轨迹算法，构造多尺度金字塔，并计算每个数据点的自相关矩阵特征值，结合钻探影响域构造钻探控制域，采用贝叶斯共轭分布理论整合先验信息和实际数据，对照不同控制域地质岩心钻探数据的密度函数，分析钻探钻进速度与泥浆压力梯度之间的关系，调整钻探倾角，对不同地质岩心钻探偏差进行修正。算例实验结果显示，采用本文所提出的方法后，钻探偏差变化率明显降低，偏差修正效果得到了显著提升。该方法有效实现了偏差的最小化，并最大化了修正效果，从而提高了地质勘探的精度和效率。 |
| 英文摘要: |
| During drilling operations, issues such as deviation of the borehole trajectory from the intended tar. get and incomplete or distorted core sampling occur, leading to significant variations in drilling deviation rates andsuboptimal correction outcomes. Therefore, a correction of drilling deviation in different geological rock cores basedon improved dense trajectory algorithm is proposed. By applying the principle of pressure relief equilibrium, effec.tive drilling depths were determined for different geological core conditions. The drilling azimuth was investigated,and an improved dense trajectory algorithm was introduced to construct a multi-scale pyramid. Constructed a multi-scale pyramid, and calculated the eigenvalues of the autocorrelation matrix for each data point. By integrating thedrilling influence zone with the constructed drilling control zone using Bayesian conjugate distribution theory tocombine prior information and actual data, we compared the density functions of geological core drilling data acrossdifferent control zones. This analysis examined the relationship between drilling penetration rate and mud pressuregradient, and the drilling inclination angle was adjusted to correct drilling deviations for different geological cores.The experimental results demonstrate that the method proposed in this article, the rate of change in drilling devia.tion is significantly reduced, and the effect of deviation correction is significantly improved. This method effectivelyminimizes the deviation and maximizes the correction effect, thereby improving the accuracy and efficiency of geo.logical exploration. |
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