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VSP地震资料以其独特的观测方式,可以同时记录纵波及横波,上行波及下行波,促使石油地震勘探步入了全波勘探的领域。在多波VSP勘探中,需要将常规的AVO道集转换成AVA道集以利于后续的地震资料反演等研究工作。从VSP资料AVO道集入手推导角度转换的公式,并根据AVA曲线拟合的原理形成AVA道集,将此方法应用到理论模型中,得到品质较高的AVA道集,并由此道集获得比较准确的反演结果,证实了该转换方法的可靠性,将该方法应用到某油田的实际资料中,取得良好的效果。
VSP seismic data, with its unique observation mode, can record P-wave and S-wave, up-wave and down-wave at the same time, prompting the oil seismic exploration to enter the field of full-wave exploration. In multi-wave VSP exploration, the conventional AVO gathers need to be converted into AVA gathers to facilitate the subsequent research on seismic data inversion. AVV gathers from the VSP data set to deduce the angle conversion formula, and AVA curve set according to the principle of AVA gathers, this method is applied to the theoretical model to get high quality AVA gathers, and thus gathers The more accurate inversion results confirm the reliability of the conversion method, and the method is applied to the actual data of an oilfield to obtain good results.