盒子波调查技术在塔中沙漠区的应用
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摘要
塔里木盆地的信噪比低,干扰波是影响深层信噪比的主要因素之一。由于塔里木盆地的地表地下地质情况十分复杂,不同的表层结构、不同的沙丘形态、不同的激发条件所产生的噪声类型、噪声水平也不同。降低干扰、突出深层有效弱信号,是深层地震勘探的关键。在分析该区干扰波特征、定量估算地震资料信噪比的基础上,对地震勘探中的采集参数进行了论证,寻找出提高信噪比的地震勘探方法,对于加快塔里木盆地的油气勘探起着至关重要的作用。
The signal-to-noise ratio of r is low in Tarim basin. The interference wave is one of the main factors affecting the deep layer signal-to-noise ratio. Because of complexity of the geologic conditions of the surface and underground in Tarim basin, the noisy type and intensity are varied in different surface structures, different sand dune appearances and different shooting conditions. Hence, the key for deep seismic prospecting is how to reduce the noises and improve the effective weak signals in deep layer. On the basis of analysis of the interference wave characteristic and the quantitative estimation of the signal-to-noise ratio from seismic data, this paper demonstrates the acquisition parameters from the seismic prospecting, presents the method for improving the signal-to-noise ratio, which will play a significant part in accelerate oil-gas exploration in Tarim basin.
引文
1)Regone CJ.测定和识别非规则地表碳酸盐岩产生的三维相干噪声.碳酸盐岩地震学,中国石油学会物探专业委员会,1998.280-295.
    [1]倪良建.塔里木盆地塔中沙漠区地震采集方法研究[A].中国石化西部新区勘探论文集[C].北京:石油大学出版社,2001.257-274.
    [2]李庆忠.论地震次生干扰[J].石油地球物理勘探,1983,18(4):296-300.
    [3]陆基孟.地震勘探原理[M].北京:石油大学出版社,2001.156-159.

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