当前位置: X-MOL 学术Geophys. Prospect. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dependence of borehole SH seismoelectric response on soil textures
Geophysical Prospecting ( IF 2.6 ) Pub Date : 2020-10-15 , DOI: 10.1111/1365-2478.13041
Weihao Wang 1 , Zhiwen Cui 1 , Jinxia Liu 1 , Tribikram Kundu 2
Affiliation  

ABSTRACT The phenomenon of acoustic waves inducing electric fields in porous media is called the seismoelectric effect. Earlier investigators proposed the usage of seismoelectric effect for well logging. Soil texture has a strong influence on the coupled wave fields during shallow surface explorations. In this article, we study the borehole pure shear‐horizontal wave and the coupling transverse‐electric field (acoustic–electrical coupling wave fields) in the partially saturated soil. Combined with related theories, we expand the formation parameters to partially saturated forms and discuss the influence of soil texture conditions on the seismoelectric wave fields. The results show that the elastic and electrical properties of porous media are sensitive to water saturation. The compositions of the acoustic and electric fields for different soil textures do not change, but the waveforms differ. We also use the secant integral method to simulate the interface‐converted electromagnetic waves. The results show that interface response strength is greatly influenced by soil texture. In addition, considering the sensitivity of the inducing electric field to fluid salinity, we also simulate the time‐domain waveforms of electric field for different pore fluid salinity levels. The results show that as the salinity increases, the electric field amplitude decreases monotonically. The above conclusions have certain significance for the application of borehole shear wave and its coupled electric fields for resource exploration, saturation assessment and groundwater pollution monitoring.

中文翻译:

钻孔SH地震电响应对土壤质地的依赖性

摘要 声波在多孔介质中引起电场的现象称为震电效应。较早的研究人员提出将地震电效应用于测井。在浅表勘探过程中,土壤质地对耦合波场有很强的影响。在本文中,我们研究了部分饱和土壤中的钻孔纯剪切水平波和耦合横向电场(声电耦合波场)。结合相关理论,我们将地层参数扩展到部分饱和形式,并讨论了土壤质地条件对地震电波场的影响。结果表明,多孔介质的弹性和电学性质对含水饱和度很敏感。不同土壤质地的声场和电场组成没有变化,但波形不同。我们还使用割线积分法来模拟界面转换的电磁波。结果表明,界面响应强度受土壤质地的影响很大。此外,考虑到感应电场对流体盐度的敏感性,我们还模拟了不同孔隙流体盐度水平的电场时域波形。结果表明,随着盐度的增加,电场幅值单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。我们还使用割线积分法来模拟界面转换的电磁波。结果表明,界面响应强度受土壤质地的影响很大。此外,考虑到感应电场对流体盐度的敏感性,我们还模拟了不同孔隙流体盐度水平的电场时域波形。结果表明,随着盐度的增加,电场幅值单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。我们还使用割线积分法来模拟界面转换的电磁波。结果表明,界面响应强度受土壤质地的影响很大。此外,考虑到感应电场对流体盐度的敏感性,我们还模拟了不同孔隙流体盐度水平的电场时域波形。结果表明,随着盐度的增加,电场幅值单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。结果表明,界面响应强度受土壤质地的影响很大。此外,考虑到感应电场对流体盐度的敏感性,我们还模拟了不同孔隙流体盐度水平的电场时域波形。结果表明,随着盐度的增加,电场幅值单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。结果表明,界面响应强度受土壤质地的影响很大。此外,考虑到感应电场对流体盐度的敏感性,我们还模拟了不同孔隙流体盐度水平的电场时域波形。结果表明,随着盐度的增加,电场幅值单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。电场幅度单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。电场幅度单调减小。上述结论对钻孔横波及其耦合电场在资源勘探、饱和度评价和地下水污染监测中的应用具有一定的意义。
更新日期:2020-10-15
down
wechat
bug