准噶尔盆地大地热流特征与岩石圈热结构

被引:93
作者
饶松
胡圣标
朱传庆
唐晓音
李卫卫
汪集旸
机构
[1] 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室
[2] 中国科学院大学
[3] 中国石油大学(北京)
关键词
地温梯度; 热导率; 大地热流; 岩石圈热结构; 准噶尔盆地;
D O I
暂无
中图分类号
P618.13 [石油、天然气];
学科分类号
070403 [天体物理学];
摘要
沉积盆地现今大地热流和岩石圈热结构特征是岩石圈构造-热演化过程的综合反映和盆地热史恢复的约束条件,对盆地动力学研究和油气资源评价具有重要意义.作者系统分析了准噶尔盆地2000年以来新增的102口钻孔的系统测井温度和400余口钻孔的试油温度资料,采用光学扫描法测试了15口钻孔共187块代表性岩石热导率,首次建立了准噶尔盆地岩石热导率柱,新增了11个高质量的(A类)大地热流数据,分析了准噶尔盆地大地热流分布特征,并揭示了其岩石圈热结构.研究表明,准噶尔盆地现今地温梯度介于11.6~27.6℃/km,平均21.3±3.7℃/km,大地热流介于23.4~56.1mW/m2,平均42.5±7.4mW/m2,表现为低地温梯度、低大地热流的"冷"盆特征.准噶尔盆地大地热流与地温梯度分布规律基本一致,主要受控于基底的构造形态,东部隆起最高,陆梁隆起次之,乌伦古坳陷、中央坳陷和西部隆起较低,北天山山前坳陷最低.准噶尔盆地地壳热流介于18.8~26.0mW/m2,地幔热流介于16.5~23.7mW/m2,壳幔热流比值介于0.79~1.58,属于典型的"冷壳冷幔"型热结构.准噶尔盆地地幔热流值与莫霍面起伏一致,隆起区地幔热流高,坳陷区地幔热流低.
引用
收藏
页码:2760 / 2770
页数:11
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