薄互层等效各向异性的实验研究

Experiment in equivalent anisotropy of thin interbedded medium

针对我国一些油田的储集层具有薄互层结构，本文研究了薄互层中弹性波的传播特性。在实验室条件下，选用两类薄互层样品，第一类为铝板和有机玻璃，第二类为铝板和蜡，层间粘合剂选用环氧树脂。经过实验室测量结果证实，当波长λ远大于薄互层中各单一夹层的层厚h（λ／h＞10）时，通过上述第一类样品的纵波呈现明显的各向异性特征；通过上述第二类样品的横波具有明显的各向异性特征。

The propagation of elastic wave in thin interbedded medium is analysed to cope with thin interbedded reservoirs in Chinese oil and gas fields. We use two kinds of experimental media. The first one is made of aluminium plate and organic plate,and the second one of aluminium and wax,with epoxy resin as binder。 The experiment leads to the conclusion that both the compressional wave passing through the first medium and the shear wave going through the second medium show obvious anisotropy when the wave length λ is much bigger than the thickness h of a single bed in the thin interbedded media (λ/h>10).