摘要
对云南宜良盆地地热资源水文地质条件、热储层结构及地热田特征等分析研究,可将宜良地热田划分为3个相对独立的地热区,并对宜良地热田基本特征、形成机制、储集形式等规律进行探究,建立了宜良地热田热储概念模型,其成因模式为大气降水补给的断裂控热深循环型地热系统。研究区热储岩性主要为震旦系灯影组白云岩,为岩溶型层状热储,热储温度一般在43℃~55℃之间,埋藏深度一般在800~1 200 m。宜良断裂带为水热对流循环提供了良好的通道和储集空间,地下热水在震旦系灯影组岩溶含水层中富集,最终形成宜良地热田。
The Yiliang geothermal field can be divided into three independent areas based on the analysis of the hydrogeological conditions,geothermal reservoir structures and geothermal field characteristics of the geothermal resources of Yiliang Basin,Yunnan. The geothermal reservoir conceptual model is set up through the study of the basic characteristics,formation mechanism and reservoir type of Yiliang geothermal field,and it is concluded that the genetic model is the deep fault-controlled heat circulation system supplied by meteoric water. The geothermal reservoir mainly consists of dolomite of Sinian Denying Formation,belonging to karst-type layered geothermal reservoir,with the temperature range of 43℃ ~ 55℃ and burial depth of 800 ~ 1 200 m. Yiliang fault provides a good pathway and reservoir space for the hydrothermal convection circulation. The geothermal water is enriched in the karst aquifer of the Sinian Denying Formation,forming the Yiliang geothermal field.
引文
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