Shining a new light on mining: developing spectral metrics for process control and decision tools in mining exploration and operation.

为采矿业带来新的曙光：为采矿勘探和运营中的过程控制和决策工具开发光谱指标。

• 批准号: RGPIN-2020-03887
• 负责人: Rivard, Benoit
• 金额: $ 3.72万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=739535
• 关键词: Shining; new; light; mining; developing

For mining exploration firms and mine operators, limited near real-time knowledge of the characteristics of geologic materials manipulated in and around mines impedes the development of efficiencies during exploration and mine exploitation. This applies for example to the characteristics of drill core and the assessment of the resources (e.g. quality of ore or shale reservoir). A long-term goal of my program is to meet these needs by conducting fundamental research in the analysis of hyperspectral imagery and later transforming the findings into an enabling technology. In this discovery cycle I will conduct studies focusing on three short term objectives: 1. Develop the real time mineral and geochemical characterization of shale core. I will focus on three research questions relevant to the characterization of shale reservoirs: i) Can one predict the total organic carbon and major element geochemical characteristics of shale core across a range of formations/basins? Here, focus is on expanding early findings across a range of major shale gas and tight oil plays; ii) Can one infer organic carbon phase relationships - kerogen, bitumen, pyrobitumen, and hydrocarbons? This is important because the specific organic carbon phase present in a shale formation dictates the type of producible hydrocarbon and relative permeability properties that are important to understanding flow rates; and iii) How many forms of silica can be discriminated? This influences geomechanical properties in a shale formation and thus fracturing potential. This research stands to provide direct means of assessing the quality of shale gas/oil reservoirs from drill core imagery. 2. Developing models to predict the geomechanical characteristics of shale drill core. To safely and effectively produce shale reservoirs through horizontal drilling and multi-stage fracking, the rock mechanics must be well characterized. This research stands to provide direct means of assessing the fracturing potential of shale gas/oil reservoirs from drill core imagery. Foreseen impact: Answers provided as part of objectives 1 and 2 open up the development of a shale classification scheme based on chips (point spectra at well site) an innovative and valuable application for industry to guide geosteering during drilling. 3. Advancing the development of mine wall and outcrop spectral imaging as a new field of remote sensing. Compared to drill core imagery, those of outcrops and mine walls have poorer spatial resolution (mm to cm size) and higher measurement noise. Can our recently developed spectral angle based band selection method improve the mapping of minerals and their chemistry in such settings? I will begin by examining dolomitic alteration that presents a range of compositional and textural characteristics. This research is relevant for guiding exploration efforts and exploitation of several types of resource deposits (oil and gas reservoirs and lead-zinc deposits).

对于采矿勘探公司和矿山经营者来说，对矿山内部和周围地质材料特性的近实时了解有限，阻碍了勘探和矿山开采过程中效率的提高。例如，这适用于钻芯的特征和资源的评估（例如矿石或​​页岩储层的质量）。我的项目的长期目标是通过对高光谱图像分析进行基础研究，然后将研究结果转化为支持技术来满足这些需求。在这个发现周期中，我将重点关注三个短期目标进行研究： 1. 开发页岩岩心的实时矿物和地球化学特征。我将重点关注与页岩储层表征相关的三个研究问题：i）能否预测一系列地层/盆地页岩岩心的总有机碳和主要元素地球化学特征？这里的重点是扩大一系列主要页岩气和致密油区的早期发现； ii) 能否推断有机碳相关系 - 干酪根、沥青、焦沥青和碳氢化合物？这很重要，因为页岩地层中存在的特定有机碳相决定了可生产的碳氢化合物的类型和相对渗透率特性，这对于理解流量很重要； iii) 可以区分多少种形式的二氧化硅？这会影响页岩地层的地质力学特性，从而影响压裂潜力。这项研究将为根据钻芯图像评估页岩气/油藏质量提供直接方法。 2. 开发预测页岩岩心地质力学特征的模型。为了通过水平钻井和多级水力压裂安全有效地生产页岩储层，必须充分表征岩石力学。这项研究将为根据钻芯图像评估页岩气/油藏的压裂潜力提供直接方法。预期影响：作为目标 1 和 2 的一部分提供的答案开启了基于芯片（井场点谱）的页岩分类方案的开发，这是一种创新且有价值的工业应用，可在钻井过程中指导地质导向。 3.推进矿井壁和露头光谱成像遥感新领域的发展。与钻芯图像相比，露头和矿井壁的图像具有较差的空间分辨率（毫米到厘米尺寸）和较高的测量噪声。我们最近开发的基于光谱角的波段选择方法能否改善此类环境中矿物及其化学成分的绘图？我将首先检查呈现一系列成分和结构特征的白云岩蚀变。这项研究对于指导多种类型的资源矿床（油气藏和铅锌矿床）的勘探工作和开发具有重要意义。