【摘要】 在P波勘探中,仅仅依据P波零炮检距旅行时(t0P)和非零炮检距(x0)信息分析P波叠加速度。与此类似,对于PS波地震资料,文中不引入任何各向异性参数,基于地层等效介质方法,推导出新的只包含PS波叠加速度、P波叠加速度的PS波时距曲线方程,使得PS波数据处理变得更为简单;同时,推导出了速度比分析方程,据此可在CMP道集数据中快速分析速度比,为共转点道集抽取提供较为准确的初始速度比参数。以上两个方法相互补充形成一个完整的方法系列,从而提高了整个转换波速度分析与共转换点道集生成的效率。通过模拟数据和实际数据的测试与验证,表明本文提出的转换波速度分析方法可为高精度PS波速度分析提供初始参数。更多还原

【Abstract】 We only rely on those messages of zero-offset travel time and nonzero-offset to estimate P-wave stacking velocity in oil seismic exploration.By analogy with that,for PS-wave seismic data,we derive in this paper a new time-distance equation of PS-wave based on the equivalent medium concept,which just includes the PS-wave stacking velocity and P-wave stacking velocity within the new equation.Thereby the processing of PS-wave data can be gotten simple.At the same time,we derive a velocity ratio equation.Then we can quickly analyze the velocity ratio based on the equation so that the initial velocity ratio parameter can be provided to extract a common-conversion-point(CCP) gather data.These two methods are so reciprocally compensative that they consist of methodologies which enhance efficiency of whole PS-wave velocity analysis and generation of CCP gather data.The test results on synthetic data and real data show that the method of PS-wave velocity analysis in this paper can provide initial parameters for high-precise PS-wave velocity analysis.更多还原