储层孔隙度最佳分辨系数灰色关联计算法

Grey Relational Method for calculating Reservoir Porosity.

从灰色滤波的基本原理出发，设计出一个服从声波时差求孔隙度的灰色滤波系统，滤除因探测系统、井通道、局部环境等因素引起的干扰，建立起声波时差与储层孔隙度之间的映射关系。应用表明，用上述方法求得的孔隙度更接近实际孔隙度值，提高了储层分辨率。

Signals of sonic logging are often affected by such factors as sonic logging tool,borehole passages, temperature, pressure and discontinuity of formation lithology. Therefore,the factors may be thought of as “grey noise system”.A grey filtering system is designed to eliminate the influence from the “grey noise system”,by which reservoir porosity can be directly obtained with interval transit time. Its applications show that porosity obtained from above method is approximate to real porosity. Thus,the of resolution reservoir is improved.