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声波全波测井曲线含有岩层粘滞弹性性质的信息,例如纵波,横波和斯通利波滞后与衰减。另外,波在出入岩层处还受到井孔与岩层界面的影响。在本文中,我们将叙述一种根据声波波列估算这种滞后,衰减和耦合作用的方法。文章先引出将声波测量和未知参数联系起来的模型。声波测量的结果是P波,S波和斯通利波的旅行时和振幅,我们一旦从波列上取到了声波测量的信息,那么问题就变成了从测量结果中估算未知参数。虽然解决本问题的过程在规模上是巨大的,但存在一种直接的方法,可以把它看作由深度延拓导出的井眼补偿方法,根据野外资料,可以用图解表示高分辨率时差测井曲线,衰减测井曲线及用于耦合的岩性。
Sonic full-wave logs contain information on the visco-elastic properties of rock formations such as lag, shear and Stoneley lag and attenuation. In addition, the wave is also affected by the interface between the wellbore and the rock formation at the entrance and exit rock formations. In this article, we describe a method of estimating this hysteresis, attenuation, and coupling based on acoustic wave trains. The article first leads to the sonic measurement and unknown parameters linked to the model. The result of sonic measurements is the travel time and amplitude of P waves, S waves and Stoneley waves. Once we have taken the sonic measurements from the wave train, the problem becomes the estimation of unknown parameters from the measurements. Although the process of solving this problem is huge in scale, there is a straightforward way to think of it as a wellbore compensation method derived from deep continuation. Based on field data, it is possible to graphically represent high resolution time difference measurements Well curves, attenuation logs and lithologies for coupling.