| 二连盆地白音查干凹陷和乌里雅斯太凹陷岩石热导率测试与分析 |
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| 引用本文： | 余如洋,黄少鹏,张炯,许威,柯婷婷,左银辉,周勇水.二连盆地白音查干凹陷和乌里雅斯太凹陷岩石热导率测试与分析[J].岩石学报,2020,36(2):621-634. |
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| 作者姓名： | 余如洋 黄少鹏 张炯 许威 柯婷婷 左银辉 周勇水 |
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| 作者单位： | 西安交通大学人居环境与建筑工程学院, 西安 710049,西安交通大学人居环境与建筑工程学院, 西安 710049;深圳大学深地科学与绿色能源研究院, 深圳 518060;美国密歇根大学地球与环境科学系, 安娜堡 MI 48109-1005,西安交通大学人居环境与建筑工程学院, 西安 710049,西安交通大学人居环境与建筑工程学院, 西安 710049,西安交通大学人居环境与建筑工程学院, 西安 710049,成都理工大学能源学院, 成都 610059,中国石化中原油田, 濮阳 457001 |
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| 基金项目： | 本文受国家自然科学基金项目（41374089）资助. |
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| 摘 要： | 岩石热导率是地热理论和应用研究中十分重要的参数,对于地热资源评估、大地热流分析、深部热状态及岩石圈热结构等相关研究提供了基础数据支撑。本文从二连盆地白音查干凹陷和乌利亚斯太凹陷采集了98块基本覆盖白垩系各地层的钻井岩芯样品,在实验室条件下对它们进行了岩石热导率测试,并收集了前人对31个样品的测试结果,进而结合孔隙度、钻孔实测温度和深度数据,对实验室条件下的测试数据进行了饱水校正和温压校正。测试样品包括泥岩、砂岩、砾岩、片岩和玄武岩,孔隙度在2%~20%之间,采样深度在117.8~3159.5m范围内,对应的温度和压力范围分别为13.5~118.6℃、2.89~77.41MPa。实测结果表明5种不同岩性岩石样品的热导率变化范围为0.89~4.91W/(m·K)。经过饱水和温压校正后,泥岩、砂岩、砾岩、页岩和玄武岩的平均热导率分别为2.08±0.36W/(m·K)、2.28±0.50W/(m·K)、2.53±0.44W/(m·K)、4.16±0.76W/(m·K)、1.33±0.09W/(m·K)。5种岩性中片岩平均热导率值最大,玄武岩平均热导率值最小,沉积岩介于两者之间,总体上具有随深度增大而增加的趋势。饱水、温度和压力校正后的热导率比干样热导率高。结合研究区内各个地层砂岩和泥岩所占比计算得到白音查干凹陷和乌里雅斯太凹陷白垩系地层热导率分别为2.00W/(m·K)和2.17W/(m·K)。结合钻孔测温数据,计算得到二连盆地大地热流值介于74~85mW/m^2,明显高于中国大陆地区平均热流值61.5mW/m^2。本文的研究成果对二连盆地以及华北北缘的地热资源,深部热状态和岩石圈结构都有意义。
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| 关 键 词： | 岩石热导率 饱水校正 温压校正 大地热流 白音查干凹陷 乌里雅斯太凹陷 |
| 收稿时间： | 2018/11/2 0:00:00 |
| 修稿时间： | 2019/11/7 0:00:00 |
Measurement and analysis of the thermal conductivities of rock samples from the Baiyinchagan Sag and Uliastai Sag, Erlian Basin, northern China |
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| YU RuYang,HUANG ShaoPeng,ZHANG Jiong,XU Wei,KE TingTing,ZUO YinHui and ZHOU YongShui.Measurement and analysis of the thermal conductivities of rock samples from the Baiyinchagan Sag and Uliastai Sag, Erlian Basin, northern China[J].Acta Petrologica Sinica,2020,36(2):621-634. |
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| Authors: | YU RuYang HUANG ShaoPeng ZHANG Jiong XU Wei KE TingTing ZUO YinHui and ZHOU YongShui |
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| Institution: | School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China;Institute of Deep Earth Science and Green Energy, Shenzhen University, Shenzhen 518060, China;Department of Earth and Environment Science, University of Michigan, Ann Arbor 48109-1005, US,School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Energy, Chengdu University of Technology, Chengdu 610059, China and Sinopec Zhongyuan Oilfield, Puyang 457001, China |
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| Abstract: | Thermal conductivity of rock plays a very significant role in the fields of geothermal related research.This paper is based on the thermal conductivity measurements of 129 borehole core samples,98 newly measured and 31collected,from the Baiyinchagan Sag and Uliastai Sag of the Erlian Basin,Inner Mongolia,northern China.The Erlian Basin is Mesozoic in age.Most samples belong to Cretaceous strata of mudstone,sandstone,conglomerate,callys and basalt with porosities ranging from 2% to 20%.They were taken from 117.8m to 3159.5m below surface where formation temperatures are estimated to be in the range from 13.5℃ to 118.6℃ and pressures from 2.89MPa to 77.41MPa.The thermal conductivities of the dry core samples were first measured at room temperature and 1atm.The measured values were subsequently corrected for the effects of water saturation,temperature,and pressure according to their porosities and depths.The measured thermal conductivities fall in the range of 0.89~4.91W/(m·K)with an increasing trend with depth.The mean lithologic thermal conductivities are 2.08±0.36W/(m·K)for mudstone,2.28±0.50W/(m·K)for sandstone,2.53±0.44W/(m·K)for conglomerate,4.16±0.76W/(m·K)for callys,and 1.33±0.09W/(m·K)for basalt after water saturation and temperature-pressure corrections.Among the five sample categories,callys is of highest thermal conductivity,whereas basalt is of the lowest.The thermal conductivities of the Cretaceous strata in the Baiyinchagan Sag and the Uliastai Sag are 2.00W/(m·K)and 2.17W/(m·K),respectively.In conjunction with borehole temperature logging data,the heat flow density of the Erlian Basin is estimated to be 74~85mW/m^2,substantially greater than the 61.5mW/m^2 mean for the continental area of China.The results of this study enrich the geothermal conductivity data of the Erlian Basin,and lay a foundation for further investigations on the geothermal energy potential,deep thermal condition and thermal structure of the lithosphere of the study area. |
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| Keywords: | Thermal conductivity Water saturation Temperature-pressure effect Heat flow Baiyinchagan Sag Uliastai Sag |
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