SURVEY METHOD, SEISMIC VIBRATOR, AND SURVEY SYSTEM

WIPO Patent Application WO/2016/170676

A1

The survey method according to the present invention comprises a step of generating, in each of a plurality of seismic vibrators, a first amplitude modulation signal by modulating the amplitude of a carrier wave in which an identical pattern is repeated in a predetermined period by a modulation signal having a period that is 1/m times (m being a natural number) the predetermined period and that differs for each of the seismic vibrators; a step of transmitting a vibrational wave based on the first amplitude modulation signal; a step of generating, in one or more receivers, a second amplitude modulation signal identical to the first amplitude modulation signal generated by any one of the plurality of seismic vibrators; a step of, in each of the one or more receivers, receiving a composite vibrational wave in which a plurality of the vibrational waves generated by the plurality of seismic vibrators are composited and generating a reception signal; a step of calculating a correlation value between the reception signal and the second amplitude modulation signal; and a step of analyzing the characteristic of a medium on the basis of the correlation value.

TAKANASHI MAMORU (JP)
NAKAMURA YUKI (JP)
KUNISHI YOSUKE (JP)

PCT/JP2015/062512

October 27, 2016

April 24, 2015

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JAPAN OIL GAS & METALS JOGMEC (JP)
JFE CIVIL ENG AND CONSTRUCTION CORP (JP)

G01V1/30

JP2005315741A	2005-11-10
JP2004163322A	2004-06-10
JP2009068881A	2009-04-02
JPH09325003A	1997-12-16

IZUMI, MICHIHIRO (JP)
Spring Michihiro (JP)

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