Error analysis of shear-velocity prediction by the Xu-White model

被引：18

作者：

Bai Jun-Yu ^{[1
]}

Song Zhi-Xiang ^{[1
]}

Su Ling ^{[1
]}

Yang Wen-Guang ^{[1
]}

Zhu Ling-Yan ^{[1
]}

Li Shi-Jie ^{[2
]}

机构：

[1] Sinopec Geophys Res Inst, Nanjing 210014, Jiangsu, Peoples R China

[2] Sichuan Bur Geol & Mineral Explorat & Dev, Geophys Prospecting Team, Chengdu 610031, Peoples R China

来源：

CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION | 2012年 / 55卷 / 02期

关键词：

Xu-White model; Shear-wave velocity; Aspect ratio; Gassmann's equations; WAVE VELOCITY; ELASTIC PROPERTIES; CLAY CONTENT; INVERSION; POROSITY; PARAMETERS; SANDSTONES; FLUID; ROCKS;

D O I：

10.6038/j.issn.0001-5733.2012.02.021

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We developed a method to predict shear-wave velocity in shale sandstone from conventional log data and experimental data, using the Gassmann's equations and the Xu-White model. It not only considers the effects of rock matrix and fluid inclusions, but also the porosity and pore shapes. The influence of errors of input parameters on the precision of prediction of S-wave velocities is analyzed. Numerical experiments show that the variable aspect ratio method provides an important improvement in the application of the Xu-White model for sand-clay mixtures as compared to the fixed aspect ratio assumption. This method has shown a significant improvement in predicting the velocities over the conventional Xu-White model.

引用

页码：589 / 595

页数：7

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