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羌塘盆地逆冲推覆构造特征及油气资源效应

季长军 吴珍汉 刘志伟 赵珍

季长军, 吴珍汉, 刘志伟, 等, 2019. 羌塘盆地逆冲推覆构造特征及油气资源效应. 地质力学学报, 25 (S1): 66-71. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.012
引用本文: 季长军, 吴珍汉, 刘志伟, 等, 2019. 羌塘盆地逆冲推覆构造特征及油气资源效应. 地质力学学报, 25 (S1): 66-71. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.012
JI Changjun, WU Zhenhan, LIU Zhiwei, et al., 2019. STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT. Journal of Geomechanics, 25 (S1): 66-71. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.012
Citation: JI Changjun, WU Zhenhan, LIU Zhiwei, et al., 2019. STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT. Journal of Geomechanics, 25 (S1): 66-71. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.012

羌塘盆地逆冲推覆构造特征及油气资源效应

doi: 10.12090/j.issn.1006-6616.2019.25.S1.012
基金项目: 

中国地质调查局地质调查项目 DD20160161

详细信息
    作者简介:

    季长军(1986-), 男, 博士, 助理研究员, 从事石油地质和沉积地质方向的研究工作。E-mail:jichangjun2007@sina.com

  • 中图分类号: P618.13

STRUCTURAL FEATURES OF THRUST NAPPES IN THE QIANGTANG BASIN AND HYDROCARBON RESOURCES EFFECT

  • 摘要: 羌塘盆地南羌塘坳陷地表古油藏作为了解盆地石油地质条件的良好窗口,经过多年来对古油藏详细解剖,通过详细的地表构造填图、二维地震和地质浅钻综合揭示了盆地存在大量的逆冲推覆构造。古油藏为盆地自北向南逆冲推覆至地表的大型构造岩席,主要表现为中生代海相地层推覆至晚白垩—中新世湖湘红层之上,古油藏含油层位是中侏罗布曲组砂糖状含油白云岩。针对古油藏石油地质条件解剖表明逆冲推覆构造虽然破坏了上坪油气藏,但是该构造活动不但能够使地层增厚利于有效烃源岩二次生烃,并对下坪地层有效遮挡封盖,同时构造活动有利于优质白云岩储集层和构造圈闭的形成,为二次成藏创造了良好的生储盖时空匹配关系,有利于逆冲推覆型油气藏的形成。

     

  • 图  1  羌塘盆地古油藏分布图

    Figure  1.  Distribution of oil reservoirs in the Qiangtang Basin

    图  2  羌塘盆地地表逆冲推覆构造特征

    J1q—下侏罗统曲色组;J2b—中侏罗统布曲组;J2x—中侏罗统夏里组;J3s—上侏罗统索瓦组;K2a—白垩系阿布山组;Ek—古近系康拓组

    Figure  2.  Characteristics of overthrust nappe in the Qiangtang basin

    图  3  羌塘盆地侏罗系成藏事件图

    Figure  3.  Jurassic hydrocarbon accumulation events in the Qiangtang Basin

    图  4  羌塘盆地古油藏形成模式图

    J1q—下侏罗统曲色组;J2b—中侏罗统布曲组;J2x—中侏罗统夏里组;J3s—上侏罗统索瓦组;K2a—白垩系阿布山组;Ek—古近系康拓组,K-E-N-Q—白垩—新生代上覆盖层;J2x-J3s—侏罗直接盖层

    Figure  4.  A model of the formation of ancient oil reservoirs in the Qiangtang Basin

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  • 刊出日期:  2019-05-28

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