VTI介质的AVO理论与应用研究

AVO（Amplitude Versus Offset)技术的研究已有30多年的发展历程，其中有起有落，近两年在国际上该技术的应用又日趋广泛，发展较快，在寻找隐蔽性和裂缝性油气藏方面，AVO具有其他方法不能替代的作用，本文通过对羊屋三维数据的处理，解释一体化的研究，发现VTI各向异性介质对动校正存在较大的时差影响，本次研究成功地应用VTI介质成像理论对该地区地震数据进行了时差校正，同时采用时频域球面发散和吸收补偿加地表一致性（炮点，接收点和炮检距项）反褶积较好的振幅和频率补偿结果，并实现了相对保持振幅的要求，通过此次处理，解释一体化研究，发现了一块具有第二类AVO特性的，在常规成像条件下无法识别的地质异常体。

Study of AVO theory and its application in VTI medium.

There are 30 years since the AVO processing method has been developed, sometimes up and sometimes down, but the application of the technology is wide and fast development in recent years. Comparing to other techniques, AVO method has an irreplaceable function in searching subtle reservoir and fractured reservoir. Through study of integrating processing into interpretation for Yangwu 3 D data, the paper discovered that VTI anisotropic medium has larger influence of time difference on NMO. This study successfully uses imaging theory of VTI medium to correct time difference of seismic data in that region. At the same time, using compensation for spherical spread and absorption in time frequency domain and surface consistent (for shot, receiver and offset) deconvolution can obtain a good compensating result in amplitude and frequency, which meets the demand for relatively reserving amplitude. Through this study of integrating processing into interpretation, a geologic anomaly body having second category of AVO character has been found, which is uncapable of distinction under conventional imaging condition.