中国物理B ›› 2017, Vol. 26 ›› Issue (12): 124301-124301.doi: 10.1088/1674-1056/26/12/124301

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Seismoelectric wave propagation modeling in a borehole in water-saturated porous medium having an electrochemical interface

Hao-Ran Ding(丁浩然), Jin-Xia Liu(刘金霞), Zhi-Wen Cui(崔志文), Tribikram Kundu   

  1. 1. Department of Acoustics and Microwave Physics, College of Physics, Jilin University, Changchun 130012, China;
    2. Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, AZ 85721, USA
  • 收稿日期:2017-07-26 修回日期:2017-09-01 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: Zhi-Wen Cui E-mail:cuizw@jlu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 40974067, 41474098, and 11134011) and the State Key Laboratory of Acoustics, China (Grant No. SKLA201608).

Seismoelectric wave propagation modeling in a borehole in water-saturated porous medium having an electrochemical interface

Hao-Ran Ding(丁浩然)1, Jin-Xia Liu(刘金霞)1, Zhi-Wen Cui(崔志文)1, Tribikram Kundu2   

  1. 1. Department of Acoustics and Microwave Physics, College of Physics, Jilin University, Changchun 130012, China;
    2. Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, AZ 85721, USA
  • Received:2017-07-26 Revised:2017-09-01 Online:2017-12-05 Published:2017-12-05
  • Contact: Zhi-Wen Cui E-mail:cuizw@jlu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 40974067, 41474098, and 11134011) and the State Key Laboratory of Acoustics, China (Grant No. SKLA201608).

摘要:

Water-saturated porous media often exhibit a seismoelectric effect due to the existence of an electrical double layer and a relative flow of pore fluid. Here we consider the seismoelectric waves in an open borehole surrounded by water-saturated porous formation which exhibits discontinuity of electrochemical properties at a cylindrical interface. We carefully analyze the seismoelectric interface response since these signals show sensitivity to contrasts in electrochemical properties across an interface. Both coupled and approximate methods are used to compute borehole seismoelectric fields. The simulation results show that the radiated electromagnetic wave from the electrochemical interface is generated due to the change of salinity in pore fluid in the porous formation. However, the elastic properties of the formation remain unchanged across such an electrochemical interface. As a result it is difficult to recognize such a change in electrochemical properties using only elastic waves. Therefore, the seismoelectric interface response is potentially used to detect the changes of the electrochemical properties in the formation.

关键词: seismoelectric effect, interface response, porous formation, borehole

Abstract:

Water-saturated porous media often exhibit a seismoelectric effect due to the existence of an electrical double layer and a relative flow of pore fluid. Here we consider the seismoelectric waves in an open borehole surrounded by water-saturated porous formation which exhibits discontinuity of electrochemical properties at a cylindrical interface. We carefully analyze the seismoelectric interface response since these signals show sensitivity to contrasts in electrochemical properties across an interface. Both coupled and approximate methods are used to compute borehole seismoelectric fields. The simulation results show that the radiated electromagnetic wave from the electrochemical interface is generated due to the change of salinity in pore fluid in the porous formation. However, the elastic properties of the formation remain unchanged across such an electrochemical interface. As a result it is difficult to recognize such a change in electrochemical properties using only elastic waves. Therefore, the seismoelectric interface response is potentially used to detect the changes of the electrochemical properties in the formation.

Key words: seismoelectric effect, interface response, porous formation, borehole

中图分类号:  (General linear acoustics)

  • 43.20.+g
91.60.-x (Physical properties of rocks and minerals) 91.30.-f (Seismology)