地热热储温度方法研究——以荆门城区为例

Research on Methods for Geothermal Reservoir Temperature—A Case Study of Jingmen Urban Area

摘要: 多年来，国内外学者不断致力于地热热储温度的研究，地热温标通常作为评价热储温度的首选方法。不同的温标方法计算的热储温度差异很大，选择温标方法时，一定要明确每一种温标方法的适用条件。利用Na-K-Mg三角图法，确定荆门城区水–岩反应未达到平衡，不能采用阳离子温标计算地热热储温度。探索应用PHREEQCI程序计算不同矿物的饱和指数，发现石英达到平衡状态，确定石英温标方法适合计算该地区热储温度。

Abstract: Over the years, scholars at home and abroad have been dedicated to the research on geothermal reservoir temperature. The geothermal thermometer is generally recognized as the preferred method for evaluating geothermal reservoir temperature. However, geothermal reservoir temperatures calculated by different geothermal thermometer methods often vary significantly. Thus, when selecting a geothermal thermometer method, the applicable conditions of each method must be clearly defined. By applying the Na-K-Mg triangular diagram method, it is determined that the water-rock reaction in Jingmen urban area has not reached equilibrium. Therefore, the cation geothermometer cannot be used to calculate the local geothermal reservoir temperature. We explore the use of the PHREEQCI program to compute the saturation indices of various minerals. It was found that quartz had achieved an equilibrium state. Consequently, the quartz geothermometer method is deemed suitable for determining the geothermal reservoir temperature in this region.