| 陈思洋,齐吉琳,肖浩汉,李秀文,曹瑞琅.基于数字钻进的砂化白云岩工程特性原位评价方法研究[J].中国水利水电科学研究院学报,2025,23(4):438-448 |
| 基于数字钻进的砂化白云岩工程特性原位评价方法研究 |
| In-situ evaluation of engineering properties in sandy dolomite using digital drilling technology |
| 投稿时间：2025-03-10 |
| DOI：10.13244/j.cnki.jiwhr.20250066 |
| 中文关键词: 砂化白云岩 黏土矿物成分 数字钻进 原位评价 X射线衍射 |
| 英文关键词:sandy dolomite clay mineral composition digital drilling in-situ evaluation X-ray diffraction |
| 基金项目:国家自然科学基金项目（52409151） |
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| 中文摘要: |
| 针对砂化白云岩工程特性原位快速评价难题，本研究结合数字钻进技术与X射线衍射分析，突破传统室内试验的局限，揭示钻进参数与矿物成分的内在关联探究其工程特性。依托西南某引水工程，基于潜孔钻机搭载的数字钻进系统开展原位试验，结合X射线衍射分析矿物成分，探究砂化白云岩工程特性，结果表明：钻进速度可有效表征砂化白云岩的空间变异性和结构特征。不同砂化程度白云岩均以白云石为主，差异主要体现在黏土矿物含量上。基于钻进速度与黏土矿物的定量关系，提出砂化程度分级标准，划分为四级，不同等级对应不同的钻进速度区间。该方法突破了传统室内试验的局限，实现了钻进过程中基于矿物成分的白云岩工程特性原位实时评价，为砂化白云岩工程特性的快速识别提供了理论支撑和技术手段，具有显著的工程应用价值。 |
| 英文摘要: |
| To address the challenge posed by the rapid in-situ evaluation of the engineering properties within sandy dolomite， this study integrates digital drilling technology and X-ray diffraction （XRD） analysis to overcome the limitations of traditional laboratory-based experiments and elucidate the intrinsic relationship between drilling parameters and mineralogical composition. Conducted at a water diversion project in Southwest China， the in-situ testing utilized a digital drilling system integrated with a downhole drilling rig. By correlating drilling performance data with XRD-derived mineralogical analysis， to explore the engineering properties of sandy dolomite. The results demonstrate that penetration rate effectively characterizes the spatial variability and structural attributes of sandy dolomite. Dolomites with varying sandy degrees are predominantly composed of dolomite， with compositional disparities primarily manifesting in clay mineral content. Based on the quantified relationship between penetration rate and clay mineral abundance， a four-level grading standard for sandy degree is proposed， with each level corresponding to distinct penetration rate intervals. This methodology transcends conventional ex-situ testing constraints， making it possible to carry out the real-time in-situ evaluation of engineering properties during drilling operations. The framework provides theoretical foundations and technical tools for rapid identification of engineering properties in sandy dolomite， offering substantial engineering applicability for subsurface characterization in similar geological settings. |
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