void cement ratio

This paper describes the design of a gray inverse filter system used for the calculation of the "gray porosity" following the sonic moveout.

从灰色反滤波的基本原理出发，设计出一个服从声波时差求“灰孔隙度”的灰色反滤波系统，滤除因探测系统、井眼、局部环境等因素引起的干扰，建立起声波时差与岩层孔限度之间的反演计算关系应用表明，用上述方法得到的孔隙度更接近实际孔限度值，并且突出了层孔隙度值的差异，从而提高了薄油层识别的水平。

The hydration variables of interest to this study were the ratio of fly ash to lime,hydration temperature and hydration time.

分别考察了飞灰/石灰比、水合温度、水合时间对脱硫剂宏观结构的影响。