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Error analysis of shear-velocity prediction by the Xu-White model
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|Authors:||Bai Junyu; Song Zhixiang; Su Ling; Yang Wenguang; Zhu Lingyan; Li Shijie|
|Author Affiliations:||Primary: |
Sinopec Geophysical Research Institute, Nanjing, China
Sichuan Province Bureau of Geology and Mineral Exploration and Development, Geophysical Prospecting Team, China
|Volume Title:||Diqiu Wulixue Bao Acta Geophysica Sinica|
|Source:||Diqiu Wulixue Bao = Acta Geophysica Sinica, 55(2), p.589-595. Publisher: Science Press, Beijing, China. ISSN: 0001-5733|
|Note:||In Chinese with English summary. 28 refs.; illus., incl. 1 table|
|Summary:||We developed a method to predict shear-wave velocity in shale sandstone from conventional log and experimental data using Gassmann's equations and the Xu-White model. This method not only considers the effects of a rock matrix and fluid inclusions, but also the porosity and pore shapes. The influence of errors in the input parameters on the precision of predicting S-wave velocities is analyzed. Numerical experiments show that the variable aspect ratio method provides an important improvement in applying the Xu-White model for sand-clay mixtures as compared to the fixed aspect ratio assumption. This method has also shown a significant improvement in predicting velocities over the conventional Xu-White model.|
|Subjects:||Body waves; Clastic rocks; Elastic waves; Errors; Geophysical methods; Numerical analysis; Permeability; Petroleum; Petroleum exploration; Porosity; Prediction; Reservoir rocks; S-waves; Sandstone; Sedimentary rocks; Seismic methods; Seismic waves; Shale; Velocity; Xu-While model|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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