纵波AVOA垂直裂缝参数反演与运用

VERTICAL ALIGNED FRACTURE PARAMET-ER INVERSION USING P-WAVE AVOA DATA

包含定向排列的垂直裂缝性储层,可用具有水平对称轴的横向各向同性介质(HTI介质)来描述。通过分析HTI介质的描述和介质中纵波的动力学性质振幅随观测方位角和入射角的变化,给出运用HTI介质中纵波的AVOA特征反演裂缝的拟各向异性系数Gani,以及方位相角Φsym等参数的方法。对一个二层HTI介质模型和实际的宽方位纵波资料进行裂缝参数的反演。数值实验和实际资料的反演结果及分析表明,该方法是可行的。

The reservoirs that include vertical aligned fractures can be described by the transverse isotropy with a horizontal axis of symmetry. By analyzing the description of HTI media and its P-wave kinetics property-amplitude variation with the azimuth and incidence angle, we present a method to inverse the parameter Gani, azimuthal phase angle sym using the AVOA data of P-wave. The results of a two layer HTI model and a field P-wave data show that the method is feasible.