山东省碣石山地热区块地热地质特征与资源量评价

Geological Characteristics and Resource Evaluation of Geothermal Resources in Jieshishan Mountain Geothermal Block in Shandong Province

摘要:

为提升山东省无棣县碣石山地区地热资源的综合利用程度，明晰地热地质条件及资源分布特征，本研究以碣石山地热区块为研究对象，系统分析了地层岩性分布特征、构造展布、热储特征及地温场分布特征与规律，并据此构建了碣石山地热区块的热储概念模型，计算了新近纪馆陶组和古近纪东营组热储层的地热资源量与地热水可采资源量。研究结果表明：碣石山地区馆陶组与东营组热储地热资源相对丰富，构成热储的源、运、储、盖结构完整，利用热储法计算可得地热区块热储中储存的地热资源总量为2.599×1016 J，折合标准煤8.88×105 t；可利用地热资源总量为6.496×1015 J，折合标准煤为2.22×105 t；地热水可采资源量为7.239×105 m3/a。本次资源量评价结果为碣石山地区地热资源的系统性评估，科学制定地热资源开发利用规划，推动资源高效开发利用提供了重要的理论依据。

Abstract:

In order to enhance comprehensive utilization of geothermal resources in Jieshishan mountain area, clarify geological conditions and distribution characteristics of geothermal resources, taking Jieshishan mountain geothermal block as the research object, stratigraphic lithology, structural patterns, reservoir characteristics and thermal field distribution have been systematically analyzed, conceptual model of thermal storage has been constructed, and geothermal resources and recoverable geothermal resources of Neogene Guantao formation and Paleogene Dongying formation thermal reservoirs have been calculated. It is indicated that there are abundant geothermal resources within these reservoirs, and geothermal sources, transportation channels, storage space and cap rocks of geothermal reservoirs are complete. By using thermal reservoir method, total stored geothermal resources have been calculated, which amount to 2.599×1016 J (equivalent to 8.88×105 tons of standard coal), the utilisable geothermal resources amount to 6.496×1015 J (equivalent to 2.22×105 tons of standard coal). The annual recoverable geothermal water resource is 7.239×105 m3/a. The findings of this resource assessment will provide crucial theoretical basis for systematic evaluation of geothermal resources in Jieshishan mountain area, scientific formulation of geothermal resource development and utilisation plans, and the promotion of efficient resource exploitation.