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多分量勘探相比常规纵波勘探而言有许多的优势,PP/PS联合AVO分析和反演是强而有效的储层识别方法。在本文中,我们推导了更精确的转换波AVO反射系数公式;并在入射角小于30度时进行了进一步简化,其对于转换波AVO分析和反演而言更加简单有效。基于该近似,我们进行了PP/PS联合AVO反演。实际资料的实例表明,反演得到的纵横波速度比可很好地识别岩性及油气。反演得到的流体因子和泊松比等其他属性在储层处也显示出明显异常,效果显著。
Multi-component exploration has many advantages over conventional P-wave exploration. The PP / PS joint AVO analysis and inversion is a powerful and effective reservoir identification method. In this paper, we derive a more accurate formula for the AVO reflection coefficient of the converted wave, and further simplify it when the incident angle is less than 30 degrees, which is more simple and effective for the AVO analysis and inversion of the converted wave. Based on this approximation, we performed a PP / PS joint AVO inversion. The actual data shows that the inversion of the P-wave velocity ratio can well identify lithology and oil and gas. The retrieved fluid factors and other properties such as Poisson’s ratio also show obvious abnormalities in the reservoir, with significant results.