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    鄂尔多斯盆地北部东胜地区侏罗系—白垩系钻孔数据库与三维地质模型

    Borehole Databases and 3D Geological Model of Jurassic-Cretaceous Strata in Dongsheng Area, North Odors Basin

    • 摘要: 随着砂岩型铀矿找矿工作的进一步开展,其对以往钻孔资料集成应用的需求尤为迫切。在煤田钻孔资料“二次开发利用”和“煤铀兼探”新方法、新思路的指导下,通过采集东胜地区钻孔资料属性数据,按照统一的标准和要求,将煤田、铀矿等类型的重要钻孔资料,通过整理、扫描、数据类型转换、录入和集成,建成了东胜地区侏罗系—白垩系综合钻孔数据库,实现了对多源钻孔数据的统一管理。该数据库共包含3个Access数据库和相应的成果图件。每个Access数据库均包含钻孔基本信息表、综合柱状分层表、岩性描述分层表、地层名称及代号表、地层颜色表、测井曲线数据表、测井曲线配置表和钻孔弯曲度测量数据表等8张数据表,分别详细记录了地质编录岩性信息、地层分层信息、岩石颜色信息、测井曲线信息、水文分层信息、钻孔样品采样信息、弯曲度测量信息等。通过应用实践,该钻孔数据库成果可实现连井剖面、含煤含铀目的层的顶底板标高、地层等厚图、砂体等厚图及含砂率图等重要基础地质图件的快速生成,从而提高数据的使用效率并为铀矿勘查及研究工作提供重要数据基础。

       

      Abstract: The integrated application of existing borehole data has become an urgent need with further prospecting of sandstone-hosted uranium deposits. In this paper, a comprehensive borehole database of Jurassic–Cretaceous strata in Dongsheng area (also referred to as the Database) was established under the guidance of the new ideas and methods of “secondary development and utilization of existing coalfield borehole data” and “coal-uranium joint exploration”. In detail, the borehole attributes of Dongsheng area were collected. Then key borehole data related to coalfields and uranium deposits were successively collated, scanned, converted into desired data types, input into data tables, and integrated into databases according to unified standards and requirements. As a result, the Database was established, achieving unified management of borehole data from multiple sources. The Database consists of three Access databases and corresponding result maps. Each of the Access databases contains eight data tables, namely Basic information of a borehole, Beds based on comprehensive histograms, Beds based on lithologic description, Names and codes of strata, Data from logging curves, Configuration of logging curves, Bending degree measurement of boreholes, etc. These data tables respectively contain detailed data of the lithology from geologic records, beds, rock colors, logging curves, hydrogeological beds, borehole sampling, and bending degree measurement. According to application and practices, the Database enables a quick generation of critical basic geologic maps such as well profiles and the isoline maps of the elevations of roofs and floors, stratum thickness, sand-body thickness, and sand content of target strata bearing coal and uranium. This will increase the data utilization efficiency and provide critical data for the exploration and research of uranium deposits.

       

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