CALIBRATION OF AE MEASURING SYSTEM BY DETONATOR TEST.

Motoyuki Sato, Katsuto Nakatsuka, Hiroaki Niitsuma, Hidekichi Yokoyama

Research output: Contribution to journalArticlepeer-review

Abstract

A simple technique to calibrate a downhole AE system to locate subsurface cracks is presented. Cross-hole detonation tests were employed for the calibration. In situ P-wave velocity in the formations is estimated from the P-wave arrival time. A simple formula associated with an appropriate filtering is proposed to equalize the difference of the frequency dependent coupling of tri-axial accelerometers set in a downhole AE sonde. Data measured at Higashi Hachimantai Field support the validity of this technique.

Original languageEnglish
Pages (from-to)537-542
Number of pages6
JournalNihon Kogyokaishi
Volume103
Issue number1195
DOIs
Publication statusPublished - 1987

ASJC Scopus subject areas

  • Engineering(all)

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