KTB Borehole Measurements: Borehole Geometry and orientation Logs (BGL) of the German Continental Deep Drilling Program

KTB Borehole Measurements Data Borehole Geometry and orientation Logs (BGL) Extensive borehole measurements were performed during the active drilling phase of the KTB pilot and main hole. The data report STR 21/03 KTB Borehole logging data contains the full description of the logging data given here. Please read it thoroughly to avoid inappropriate or wrong use of the data. The KTB borehole measurement data files contain the final processed versions of logging data from the two KTB boreholes: • KTB-Oberpfalz VB (KTB Vorbohrung/Pilot Hole or KTB-VB) • KTB-Oberpfalz HB (KTB Hauptbohrung/Main Hole or KTB-HB). Here only the acronyms KTB-VB and KTB-HB are used. In total there are 145 data files from the KTB-VB and 239 data files from the KTB-HB. All logs were run in open hole unless noted otherwise (see the file header). The maximum logging depth was 4001 m in the KTB-VB and 9085 m in the KTB-HB. The Borehole Geometry and orientation Logs files contain data from measurements made with oriented 4-arm caliper sondes. Besides all single BG logs from each borehole also compilations of those BG logs representing the borehole geometry state during the major logging sessions and the derived borehole trajectory and true vertical depth are included here. The many single logs allow to analyze the development of the borehole shape over time. The date when logged is denoted in the file header. Please note that the single Borehole Geometry Logs are not depth corrected to the reference GR but are given here as logged. The BGL compilations and derived data are depth corrected to the reference GR. The data are provided in ASCII format. Detailed descriptions are provided in the associated data report (STR 21/03, Kueck et al., 2021) and the KTB Borehole Measurements Catalog. Acknkowledgements: The GFZ German Research Centre for Geosciences, Potsdam, Germany, as successor of the KTB Project Management provides the logging data, which were obtained under grants RG8604, RG8803 and RG 9001 of the Federal Ministry of Research and Technology of Germany.

KTB钻孔测量数据：钻孔几何与定向测井（Borehole Geometry and orientation Logs, BGL）
在KTB先导孔与主孔的主动钻井阶段，已开展大规模钻孔测量工作。数据报告《STR 21/03 KTB钻孔测井数据》包含了本文所述测井数据的完整说明，请务必仔细研读，以免对数据使用不当或出现误用。
本数据集包含两个KTB钻孔测井数据的最终处理版本：
• KTB-Oberpfalz VB（KTB先导孔，即KTB Vorbohrung/Pilot Hole，简称KTB-VB）
• KTB-Oberpfalz HB（KTB主孔，即KTB Hauptbohrung/Main Hole，简称KTB-HB）
后文将仅使用缩写KTB-VB与KTB-HB指代上述两个钻孔。其中KTB-VB共包含145个数据文件，KTB-HB共包含239个数据文件。
除文件头另有注明外，所有测井作业均在裸眼井中开展。KTB-VB的最大测井深度为4001米，KTB-HB的最大测井深度为9085米。
钻孔几何与定向测井文件存储了采用定向四臂井径仪采集的测量数据。本数据集不仅包含各钻孔的全部单条钻孔几何测井（BG logs）数据，还整合了主要测井作业期间反映钻孔几何状态的测井数据，以及由此推导得到的钻孔轨迹与真垂直深度数据。大量单条测井数据可用于分析钻孔形态随时间的演化过程。测井日期将标注于文件头中。
请注意：单条钻孔几何测井数据未参照参考自然伽马（Gamma Ray, GR）曲线进行深度校正，仅按原始采集时的深度发布。而BGL整合数据与衍生数据已参照参考自然伽马曲线完成深度校正。
本数据集以ASCII格式存储。详细说明可参阅相关数据报告（STR 21/03，Kueck等，2021）及《KTB钻孔测量目录》。
致谢：德国波茨坦GFZ德国地球科学研究中心（作为KTB项目管理机构的继任方）提供本次测井数据，这些数据是在德国联邦研究与技术部的RG8604、RG8803及RG9001项目资助下获取的。