摘要
干热岩钻孔温度是干热岩型地热资源评价的重要指标,目前大多数地勘工作的温度测量仪工作温度大都在180℃以下,然而随着干热岩钻孔深度和温度的增加,受钻孔内高温、高压的影响,出现超出仪器测温范围或测温数值不准确的情况。为此,本文利用青海共和干热岩GR1井采用BZM电子多点测温仪、MTCHTH型测温仪以及多组温度计的方式进行了多种方法的单点测温,同时结合SKD3000B井车测温、GRY1型钻孔轨迹测量仪等多点连续测温方式进行对比分析。结果表明,单点测温结果更接近真实地层温度,但单点测温效率低,精度差;GRY1型钻孔轨迹测温仪因隔热装置隔绝,温度传导效率较慢,测温结果偏低。需要进一步开发准确、有效、经济的高温井下温度测量仪器或方法。
Temperature is an important indicator for evaluation of hot dry rock geothermal resources.At present,most temperature measuring instruments for geological survey work only can work below 180℃.However,with the increase of the depth and temperature in hot dry rock drilling,downhole temperature may exceed the tool measurement range,or error may occur in temperature measurement due to high temperature and high pressure.During drilling of hot dry rock WellGR1 in Qinghai Gonghe hot dry rock,single-point temperature measurement was performed with BZM electronic multi-point thermometer,MTCHTH thermometer and multiple groups of thermometers in conjunction with multi-point continuous temperature measurement with the SKD3000B logging truck and GRY1 borehole inclinometer.Comparison of the measurement results show that single-point temperature measurement is closer to the real temperature,but it has low efficiency and poor accuracy;the GRY1 tool gives lower temperature due to slow temperature transmission caused by heat insulation.It is necessary to develop accurate,effective and economical high-temperature measuring instruments or methods.
作者
马哲民
谭现锋
郝俊杰
刘肖
MA Zhemin;TAN Xianfeng;HAO Junjie;LIU Xiao(Shandong Lunan Geological Engineering Survey Institute 〈The Second Geological Brigadeof Shandong Geological Survey Bureau〉, Jining Shandong 272100, China;Shandong Geothermal Clean Energy Exploration and Development Engineering Research Center,Jining Shandong 272100, China;Second Hydrogeological Engineering Geological Brigade of Shandong Geological and Mineral Explorationand Development Burean, Dezhou Shandong 253072, China)
出处
《探矿工程（岩土钻掘工程）》
2020年第12期42-48,共7页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
干热岩
钻孔测温
高温测量
单点测温
多点连续测温
hot dry rock
drilling temperature measurement
high temperature measurement
single-point temperature measurement
multi-point continuous temperature measurement
