基于微动技术的浅层地热资源勘探与储量精细评价方法研究

Exploration and Amount Fine Evaluation of Geothermal Resources Based on Microtremor Survey Method

作为未来能源新星的地热资源逐步受到青睐,其中,浅层地热能的利用至关重要。本文介绍了微动探测技术,针对城市地下空间浅层地质结构探测、浅层储量评价精度等不同的实际应用问题和现实工程需求,以迷你阵列微动探测方法为基础,用于精细识别浅层地质结构,获得岩土层厚度信息,精细化评价地热储量。此外,利用数据拟合技术建立地球物理参数与土体热导率的经验关系,预测测试目标区的土体热导率。青岛即墨区的案例,说明了此方法在地热资源开发利用中的应用效果。

Geothermal resources has gradually paid attention as the potentially future energy. And the utilization of shallow geothermal resources plays an important role. In this paper, it introduces the newly developed microtremor survey method. According to the different requirement of application problems and engineering such as the fine detection of underground structure and evaluation of geothermal resources, a miniature array microtremor survey method is presented to fine identify the shallow geological structure and obtain the thickness of rock and soil layer, accurately evaluate the amount of geothermal resources. Also, the correlations between geophysical parameters and thermal conductivities of the strata are built using fitting methods to infer the thermal conductivities of testing area. Using the case of Jimo, Qingdao, it verifies the effective of this series methods which are used to the development of geothermal resources.