多維巖心鉆孔數(shù)據(jù)解析與巖性柱狀圖生成系統(tǒng)
[Abstract]:Multidimensional data visualization of borehole core is an effective means of mineral exploration engineering and geological informationization, and has a broad application prospect. As the first-hand data, the spectral data of borehole core is the data source of all geological visualization. Therefore, it is necessary to record, manage and analyze the spectral data of borehole core. The lithology analysis of core data is the first step of mineral stereo mapping, and the mineral type data after lithology analysis can be used as the data source of ore body visualization. At the same time, the lithology column diagram is a CAD map of borehole core data, which visualizes the multi-source and multi-source attribute data of borehole in the way of two-dimensional chart, and it is the research field of geological exploration. In this paper, the methods of lithology analysis, data cataloging management and cleaning, and visualization of drilling and mineral data are studied. The main work and innovation of this paper are as follows: 1. The conceptual structure, logical structure and automatic cataloging of multi-dimensional attribute data of drilling cores are given. Data relationship diagram design; through the extraction, conversion and cleaning of core multi-dimensional attribute data, the effective management of drilling core data is realized. 2. The problem of lithology analysis in drilling data is solved by spectral matching method. The classical algorithms such as spectral angle matching algorithm, correlation coefficient matching algorithm, information dispersion matching algorithm are studied in this paper. A spectral matching algorithm based on Jaccard correlation coefficient is proposed. This method makes full use of the trend of the spectral curve in the wavelength direction, binary encoding the first-order differential information, and then matches the spectral curve by calculating the Jaccard correlation coefficient. High precision of spectral matching. The purpose of lithology analysis is achieved by matching the spectral data of borehole core data with the data of spectral database. 3. Key technologies such as buffer line drawing of lithology histogram generation and automatic Line-Changing algorithm of characters are studied and realized. The experimental results show that the two algorithms proposed in this paper can quickly draw lithologic patterns and composite lithologic patterns, and have been well applied in lithologic columnar graphs. 4. Lithological classification of lithologic columnar graphs. On the basis of layer data, this paper presents a three-dimensional solid structure method of lithologic orebody based on the fitting of lithologic discrete data profiles with different drilling depths. Combined with light rendering, the ore body is reconstructed and visualized. In block design, a lithologic bar chart generation system is developed under the environment of OpenGL and Visual C++. The application of actual exploration drilling data shows that the software is effective and practical.
【學(xué)位授予單位】:南京理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:P634;TP391.41
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