裂缝介质地震波场特征正演模拟分析
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摘要
通过对含裂缝构造地质模型正演模拟发现,在裂缝带处,地震反射波场特征参数(振幅、衰减系数、频率和速度等)不但与地层中裂缝密度、裂缝中充填物的速度和密度有关,而且与裂缝的走向有关。含裂缝构造储层介质的各向异性对地震波场特征有明显的影响,并且对反射地震波能量的衰减影响大于对速度的影响。对于含裂缝介质来说,在研究含裂缝介质的各向异性时,利用地震波振幅变化比利用速度变化更可靠。
In this paper,by the forward modeling of the geological model with vertical thin bedded construction,it can be found the seismic wave field character parameters(amplitude,attenuation coefficient,frequency,velocity and so on)not only are related to the vertical thin bedded density,the substance density and velocity in the vertical thin bed,but also to the vertical thin bedded azimuth.The medium anisotropism of vertical thin bedded construction has great effects on the seismic wave field characters,and it also has more effects on the seismic wave reflected energy attenuation than seismic wave velocity.As for the vertical thin bedded medium,it is more reliable by making use of the changes of seismic wave amplitude than by using the velocity when studying the vertical thin bedded medium anisotropism.
引文
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