弹性阻抗反演及应用研究

Elastic impedance inversion and its application

利用常规叠后波阻抗反演方法不能得到可靠的波阻抗和其它岩性信息.本文运用弹性阻抗反演理论对某地区的地震资料进行了分析研究,应用实例表明,用弹性阻抗反演方法可得到较理想的反演结果,且从反演所得到的波阻抗剖面中能提取出许多岩性参数,这些岩性参数能反映岩性和流体特征.与传统的波阻抗反演相比,弹性阻抗反演具有信息量丰富、分辨率高的特点;与定性的AVO反演相比,该方法达到了定量的程度,而且速度快.

The post-stack inversion can’t obtain reliable impedance and other lithologic information. This paper does analysis on an area seismic data using elastic impedance inversion theory. The case indicates that elastic impedance inversion can obtain ideal inversion result and from the inverted impedance section we can extract lithologic parameters which can reflect lithology and fluid character. More information and higher revolntion than traditional invevsion are obtained through the elastic impedance inversion, and it is more quantitative and fast than AVO inversion.