鄂尔多斯盆地古地温研究
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摘要:
本文采用镜质体反射率、包裹体测温、磷灰石裂变经迹等多种古地温研究方法,确定了鄂尔多斯盆地中生代晚期高地温场的存在,古地温梯度高达3.5~4.0℃/100m,高于现今盆地的平均地温梯度2.89°C/100m。古生界地层最大古地温一般在150~240°C之间,最高可达270°C以上,古地温明显高于今地温。高古地温梯度的形成与中生代末期的构造活动密切相关。根据盆地热演化史与油气关系研究可知,在古生代和中生代早期,地温梯度低。推迟了生气时代,有利于有机质的保存。中生代晚期,地温梯度高,是古生界碳酸盐岩及煤系地层的主要生气期及运移期。生气高峰期较晚,盆地内又缺乏断裂,有利于大气田的保存。
Abstract:本文采用镜质体反射率、包裹体测温、磷灰石裂变经迹等多种古地温研究方法,确定了鄂尔多斯盆地中生代晚期高地温场的存在,古地温梯度高达3.5~4.0℃/100m,高于现今盆地的平均地温梯度2.89°C/100m。古生界地层最大古地温一般在150~240°C之间,最高可达270°C以上,古地温明显高于今地温。高古地温梯度的形成与中生代末期的构造活动密切相关。根据盆地热演化史与油气关系研究可知,在古生代和中生代早期,地温梯度低。推迟了生气时代,有利于有机质的保存。中生代晚期,地温梯度高,是古生界碳酸盐岩及煤系地层的主要生气期及运移期。生气高峰期较晚,盆地内又缺乏断裂,有利于大气田的保存。
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[1] 1 任战利,1991,关于沉积盆地古地温场恢复间度的探讨,青年科学文集,西北大学学报,增刊,227-234.
2 任战利,1992,沉积盆地热演化史研究最新进展,地球科学进展,7卷3期,41-49页。
3 杨俊杰,1991.陕甘宁盆地下古生界天然气的发现,天然气工业,11卷2期,1-6页.
4 赵重远、刘池洋等着,1990,华北克拉通沉积盆地形成与演化及其油气赋存,西北大学出版社,93-100页.
5 赵孟为,1992.磷灰石裂变径迹法在盆地地热史研究中的应用,石油学报,13卷4期,1-9页。
6 Barker,C. E. and Pawlewicz, 1986, The correlation of vitrinite reflectance with maximum temperature in organic matter;in G. Buntebarth and L. Stegena, ads.,Paleogeothermics, lecture notes in earth sciences, V. 5, Berlin. Spzingerverlag, p. 79一 93.
7 Barker,C. E.,1991, Implications for organic Maturation Studies of Evidence for a geologically rapid increase and stabilization of vitrinite reflectance at peak temperature: Cerro Prieto geothermal system. Mexico: AAPG Bull, V. 75. N.12. p. 1852一1863.
8 Dow, w·G.,1977. Kerogen studies and Geological interpretation, Journal of Geochemical Exploration. V. 7, N. 2. p. 79一99.
9 Gleadow, A. J. w.,Duddy, I. R.,end Lowering, J. F.,1983. Fission track analysis, a new tool for the evaluation of thermal histories and hydrocarbon potential, APEA Journal. V. 23, p. 93一102.
10 Green,P. F.,Duddy, I. R.,Gleadow, A. J. w.,and Lowering, J. F.,1989a, Apatite fission track analysis as a paleotem perature indicator for hydrocarbon exploration, in N. D. Naesor and T. M. Mcculloh, ad.,Thermal history of sedimentary basins一methods and case historiess New York, springer一verlag, p. 191一195.
11 Kamp, P. J. T.,Green , P. F.,1990. Thermal and tectonic history of selected Taranaki Basin (New Zealand) wells assessed by apatite fission track analysis; AAPG Bull, V. 74, N. 9, p. 1401一1419.
12Law, B .E.,1992. Thermal maturity patterns of Cretaceous and Ternary rocks. San Jun Basin. Colorado and New Mexico,Geological Society of America, V. 104, N. 2, p. 192一207.
13 Naeser,N.,Naeser, C. W.,and McCulloh. T. H.,1990, Thermal history of rocks in Souther San Joaquin Valley, Califonia: evidence from fission-track analysis; AAPG Bull. V. 74, N. 1, p. 13一29.
14 Tilley,B. J.,et al.,1989, Thermal history of Alberta Deep Basin; Comparative study of fluid inclusions and vitrinite reflectance data; AAPG Bull, V. 73, p. 1206一1222. -

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