一种计算地层平均品质因数值的方法

A method to calculate the average quality factor value ■ of strata

地层品质因数是进行储层描述及地震资料高分辨率处理方面的重要参数。由于反射波振幅失真和波形畸变的影响，用以反射振幅和频谱变化为依据的反演方法从地震资料中提取该参数受到了很大的限制，反演结果稳定性差，难以形成区域性的认识规律。本文从地层品质因数（Q）与纵波层速度（vp）关系出发，推导出了地层平均品质因数（Q）与平均速度（v）之间的通用公式，它能适应各种速度模式的变化情况，这对于我们认识某地区地层品质因数的总体规律具有十分重要的意义。

The strata quality factor is an important parameter for the reservoir description and high-resolutionseismic data processing. Because of the effects of the reflected wave amplitude and waveform distortion,the extraction of the parameter from seismic data by the inversion based on reflected wave amplitude and frequency spectrum variation is restricted greatly. The stability of the inversion result is poor, and it isdifficult to form regional recognition law.Starting from the relation between the strata quality factor (Q) and the P-wave interval velocity (vp), we derive the universal formula for the relation between the average quality factor of strata (Q)and the average velocity (v). It on adapt to the change of various velocity mode. This is very impor-tant for us to understand the general law of strata quality factors in an area.