ESTIMATION OF DEEP GEOTHERMAL RESERVOIR TEMPERATURE IN QABQA AREA, QINGHAI PROVINCE
LI Yong-ge1, LIN Wen-jing2, XING Lin-xiao2, WANG Gui-ling2, LIU Zhi-ming2
1. Puyang Hydrology and Water Resources Survey Bureau, Puyang 457000, Henan Province, China; 2. Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang 050000, China
摘要地下热储温度的确定，可为评价地热资源潜力提供重要参数.青海省恰卜恰地区地热资源丰富，但深部热储温度难以确定.利用青海省恰卜恰地区两个热水井，结合其水化学特征，采用多种方法估算深部热储温度.结果显示：二氧化硅温标指示性最强；PHREEQC软件对冷水混入和脱气作用进行了校正，使得计算结果相对准确可靠.经多种方法相互验证，最终确定恰卜恰地区新近系的热储温度在86~107℃，地温梯度大约为6℃/100 m.
Abstract：The determination of geothermal reservoir temperature can provide significant parameters for evaluating geothermal resource potential. Qabqa area of Qinghai Province is enriched in geothermal resources, but it is difficult to determine the deep geothermal reservoir temperature. Based on the two hot water wells in Qabqa area, combined with their hydrochemical characteristics, various methods are used to estimate the deep geothermal reservoir temperature. The results show that the temperature scale of SiO2 is the most indicative. The correction of mixing of cold water and degassing by PHREEQC software makes the calculation results relatively accurate and reliable. Through mutual verification of several methods, it is finally determined that the Neogene geothermal reservoir temperature in Qabqa area is 86-107℃, with the geothermal gradient about 6℃/100 m.
李永革, 蔺文静, 邢林啸, 王贵玲, 刘志明. 青海省恰卜恰地区深部热储温度估算[J]. 地质与资源, 2021, 30(4): 479-484,511.
LI Yong-ge, LIN Wen-jing, XING Lin-xiao, WANG Gui-ling, LIU Zhi-ming. ESTIMATION OF DEEP GEOTHERMAL RESERVOIR TEMPERATURE IN QABQA AREA, QINGHAI PROVINCE. GEOLOGY AND RESOURCES, 2021, 30(4): 479-484,511.
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