富油煤资源勘查研究现状及展望

Current situation and prospect of exploration and research on tar-rich coal resources

  • 摘要: 富油煤是一种煤基油气资源,具备规模化开发的资源基础,但其资源勘查仍存在焦油产率预测方法普适性不足、富油煤资源勘查程度不高、富油煤资源开发潜力评价体系不完善等问题。为有效支撑富油煤资源开发,系统梳理了富油煤焦油产率预测及资源开发潜力评价的研究现状。结果表明:焦油产率是判定富油煤的唯一标准,目前已初步形成葛金低温干馏等试验测定技术、基于补偿密度及自然电位等测井信息的地球物理预测技术、基于煤岩煤质信息的预测技术以及多信息融合综合预测技术4类方法,最高预测精度可达80%以上;预测了新疆吐哈盆地、三塘湖盆地、鄂尔多斯盆地、宁夏及淮南等地区主要煤层的富油煤资源分布范围、计算了富油煤资源量,形成了资源开发潜力评价指标体系雏形。未来,富油煤资源将会成为国家油气资源的重要补充,为能源安全提供保障。富油煤资源勘查需充分结合煤炭资源常规勘查技术,提高地质条件勘查程度;综合多种常规勘查方法,提高焦油产率预测精度及技术普适性;采用新型现代化测试手段,深化富油煤物性特征识别;充分利用现代人工智能技术及高水平计算能力构建地质模型。基于此,提出“高精度勘查技术研究富油煤地质构造特征、多手段预测富油煤焦油产率、多方法测试富油煤物性特征、多信息融合构建富油煤地质模型”的勘查技术思路,构建富油煤资源勘查技术体系,提高富油煤资源勘查程度,为富油煤绿色低碳可持续开发提供地质支撑。

     

    Abstract: Tar-rich coal is a kind of coal-based oil and gas resource with a solid foundation for large-scale development. However, its resource exploration still faces challenges, including insufficient universality of tar yield prediction methods, low exploration degree of oil-rich coal resources, and an imperfect evaluation system for the development potential of oil-rich coal resources. In order to effectively support the development of tar-rich coal resources, the current research status of tar yield prediction and resource development potential evaluation of tar-rich coal is systematically reviewed. The results show that tar yield is the sole criterion for determining tar-rich coal. Four types of tar yield prediction methods have been initially formed, namely, experimental determination techniques such as Gekin low-temperature dry distillation, geophysical prediction techniques based on logging information such as compensated density and natural potential, prediction techniques based on coal, rock and coal quality information, and comprehensive prediction techniques based on multi-information fusion. The highest prediction accuracy can reach more than 80%. The distribution range of tar-rich coal resources in major coal seams in regions such as the Tuha Basin, Santanghu Basin, Ordos Basin, Ningxia and Huainan was predicted, the amount of oil-rich coal resources was calculated, and the prototype of the evaluation index system for resource development potential was formed. In the future, tar-rich coal resources will become an important supplement to the country’s oil and gas resources, providing a safety net for China’s energy security. The exploration of tar-rich coal resources needs to fully integrate conventional coal resource exploration techniques to enhance the degree of geological condition exploration, fully combine conventional exploration methods to improve the accuracy of tar yield prediction and the universality of technology, fully integrate modern new testing methods to enhance the identification of physical property characteristics of tar-rich coal, and fully utilize modern artificial intelligence technology and high-level computing power to construct geological models. Propose the exploration technical idea of “high-precision exploration technology to study the geological structural characteristics, multi-means to predict the tar yield, multi-method to test the physical property characteristics and multi-information fusion to construct geological model”. Build a technical system for the exploration of tar-rich coal resources, enhance the degree of exploration, and provide geological support for the green, low-carbon and sustainable development of tar-rich coal.

     

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