基于非线性有效孔隙度的地层骨架参数横波预测

横波速度对储层岩性、物性和流体识别起着重要作用。但目前绝大多数井缺少横波测井速度资料。因此,在没有横波测井速度资料的井中精确计算横波速度曲线意义重大。目前常用的有Biot-Gassmann方法和Castagna方法等,但是它们在研究区域的应用效果不理想。建立了一套通过计算地层骨架值曲线拟合横波的方法,通过用计算的地层骨架值曲线和常规曲线与实测横波曲线做多元回归拟合求得横波预测曲线,得到了较好结果。

Prediction of shear-wave using the formation grain parameter based on the non-linearly effective porosity

s-wave velocities plays an important role in recognition of reservoir lithology and physical properties and fluids. But now most Wells are lack of s-wave logging velocity data. Thus, it is of great significance to accurately compute s-wave velocities in the Wells without s-wave logging velocity data. This paper introduced a new method to fit s-wave curve through calculating stratigraphic skeleton curve , which builds multiple regression equation to predict s-wave curve using the stratigraphic skeleton curve , the conventional curves and measured s-wave curve, and obtained good results.