新疆石油地质

新疆石油地质 ›› 2000, Vol. 21 ›› Issue (1): 38-41.

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准噶尔盆地热演化历史模拟

邱楠生, 查明, 王绪龙   

  1. 石油大学盆地与油藏研究中心 北京昌平102200
  • 收稿日期:1999-07-29 出版日期:2000-01-01 发布日期:2021-01-15
  • 作者简介:邱楠生,副教授,构造地质学。1)潘长春等.准噶尔盆地古地温、烃源岩热演化史研究报告,1994. 2)余亮平.准噶尔盆地模拟地质参数研究,新疆石油管理局勘探开发研究院研究报告,1990.

Simulation of Geothermal Evolution History in Junggar Basin

Qiu Nansheng, Zha Ming, Wang Xulong   

  1. Qiu Nansheng, Associate Professor, Petroleum Geology, Research Center of Basin and Reservoir, University of Petroleum, Changping, Beijing 102200
  • Received:1999-07-29 Online:2000-01-01 Published:2021-01-15

摘要： 根据磷灰石裂变径迹和镜质体反射率(Ｒ。)动力学模型模拟了准噶尔盆地腹部莫索湾、陆南和盆地南缘等地区的地温演化历史。研究结果表明,尽管准噶尔盆地现今的地温较低,但由于受构造运动的影响,各地质历史时期的地温演化不同,盆地的古地温较现今地温高。特别是在古生代和三叠纪,地温梯度很高。古生代的地温梯度平均大于38℃／ｋｍ,中生代三叠纪的地温梯度仍很高,为34．6－41℃／ｋｍ．侏罗纪的地温梯度变化较大,这可能与该时期的构造运动频繁有密切关系。白垩纪以后盆地的地温梯度演化基本不变,与现今相当。

关键词: 准噶尔盆地, 镜质体反射率, 热演化, 地质历史, 模拟, 磷灰石, 裂变径迹年龄测定

Abstract: Based on the apatite fission radial symptom and dynamic model of vitrinite reflectance (R), the simulation of geothermal evolution history in hinterland areas as Mosuowan and Lunan and southerm margin of Junggar basin was made. Study showed that in spite of relatively low geothermal temperature nowadays in Junggar basin, the geothermal evolution varied from time to time in each geologic history period with higher paleogeotherm than present geotherm, particularly in Paleozoic and Triassic due to the effect of tectonic movements. The average geothermal gradient of Paleozoic was up to 38 C/km or above, that of Triassic arranged from 34.6 C/km to 41 C/km. In Jurassic it was still changing considerably,which was probably due to frequent tectonic movements. Following Cretaceous, it tended to be stable in general and similar with present geothermal gradient.

Key words: Junggar basin, Vitrinite reflectance, Thermal evolution, Geologic history, Simulation, Apatite, Fission track dating