遥感图在地震勘探中的应用——以酒泉盆地洪积扇区为例
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摘要
分析了洪积扇的遥感影像特征及洪积扇沉积物分选特征,总结了酒泉盆地山前带洪积扇戈壁砾石区的影像形状与低降速带厚度在平面上的分布、低降速带厚度与沙土层(包括含砾沙层)厚度在平面上的分布及表层速度结构与岩性分选等存在的一一对应关系,提出了利用洪积扇的遥感影像图来选择激发岩性的地震采集方法,提高了资料品质,通过在酒泉盆地山前带洪积扇区的应用,提高了单炮资料信噪比和分辨率,取得了很好的地质效果。
This paper introduced the characteristics of remote sensing image and the sorting characteristics of sediments in diluvial fan,and discussed the relationships between the image pattern of diluvial fan and the areal distribution of LVL thickness,the thickness of LVL and sand layer(including gravel-sand layer),as well as the velocity structure of LVL and the lighological sorting in piedmont gravel zone in Jiuquan Basin.Based on the analysis,we established a method of choosing excitation lithology using the remote sensing image of diluvial fan.Practices show that the method could significantly improve both the signal-to-noise ratio and the resolution of raw data.
This paper introduced the characteristics of remote sensing image and the sorting characteristics of sediments in diluvial fan,and discussed the relationships between the image pattern of diluvial fan and the areal distribution of LVL thickness,the thickness of LVL and sand layer(including gravel-sand layer),as well as the velocity structure of LVL and the lighological sorting in piedmont gravel zone in Jiuquan Basin.Based on the analysis,we established a method of choosing excitation lithology using the remote sensing image of diluvial fan.Practices show that the method could significantly improve both the signal-to-noise ratio and the resolution of raw data.
引文
1刘登忠,朱利东.影像地层学基本原理及研究方法[J].Journal of Stratigraphy,1994,23(2):107～113
2赵志忠,乔彦肖.冲洪积扇与泥石流扇的遥感影像特征辨析[J].地理学与国土研究,2001,17(3):35～38
2赵志忠,乔彦肖.冲洪积扇与泥石流扇的遥感影像特征辨析[J].地理学与国土研究,2001,17(3):35～38
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