岩石的纵、横波速度规律

Velocity regularities of P and S-waves in formations

在收集、分析前人不同岩性的岩石的地震纵、横波速度测定结果的基础上,本文重点研究了砂岩的速度规律,通过综合、归纳得到饱含水砂岩及含气砂岩的纵、横波速度总规律。它们可以拟合表达成两条抛物线,四个V_p、V_s互推公式。文中指出,以往的一些研究者对数据采用线性拟合,只适用于特定的地区,特定的层位,而抛物线公式可以具有普遍的适应性。文中提供的四个经验公式及全部说明上述关系的图件将有助于AVO幅距分析研究,以及在多波勘探中掌握岩性规律及寻找油气聚集地段。

The velocity regularities of seismic waves in sandstone are emphatically studied by comprehensively analysing previous authors'velocity results of P and S-waves in various rocks.The velocity regularities of P and S-waves in water-saturated and gas-saturated sandstones have been derived from the comprehensive analysis and study. They can be expressed as two parabolas and four empiric V_p-V_s formulas. It is pointed out that some researchers'linear fitting of velocity data is only applied to a particular area or a particular formation while the parabola formulas have wide adaptability. Four empiric formulas and the relevant figures in this paper favour AVO analysis, lithology regularity recognition in multiwave exploration, and the discovery of hydrocarbon accumulation area.