Experimental study on coupled acoustic and electromagnetic waves in model wells

H. Hu, Chi Wai Li, Z. Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Electrokinetic experiments are conducted at acoustic logging frequency in model wells with different kinds of formations. One is man-made material. The other is full-diameter sandstone core from target formation. We observed electric waveforms that accompany the acoustic waves in permeable formations. On the boundary between the permeable formation and another formation, there also exist acoustic waves propagating at a speed of electromagnetic waves. The relative amplitudes of these two kinds of acoustically associated electric fields depend on formation water salinity and differences of borehole fluid salinity. We also observed acoustic waves are converted from alternating electric signal in the formation. The higher the salinity, the weaker the acoustically induced electric field, and hence, the stronger the electrical induced acoustic wave.
Original languageEnglish
Pages (from-to)89-95
Number of pages7
JournalCejing Jishu/Well Logging Technology
Volume25
Issue number2
Publication statusPublished - 1 Jan 2001

Keywords

  • [Acoustoelectric conversion]
  • Acoustic wave propagation
  • Laboratory test
  • Simulation well
  • Wave coupling

ASJC Scopus subject areas

  • Geology

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