Non-explosive downhole seismic source for powerful signal.
OWS (OYO Wappa Source) is an innovative downhole seismic source with fully different principle from those the conventional ones had.
The source can transmit excited energy to the ground through fluid with higher efficiency. Getting larger seismic force from small electrical energy is focused for designing, which makes no damages to the borehole wall.
● The simplest seismic source being suitable to a 100m scaled crosswell seismic survey.(depends on
geological condition)
● Good reproducibility and high frequency source
● Efficient stacking with high speed excitation at every 10 seconds
● Efficient excitation without any damages to borehole wall
● Applicable to 66mm dia. hole and up to 300m in depth
● Simple structure for easy maintenance
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OWS probe, Model-1394B
Outer dia
Weight
Operating temperature
Trigger
：50mm x 2340(L) mm
：19kg
：0 to 60 deg C
：Two type of trigger signalsare available
1) Analog signal from geophone inside the source
2) Signal conditioned pulse signal (TTL level)
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OWS controller Model-1395A
Power requirement
Operating temperature
Dimensions
Weight
：AC 100V±10%
：0 to 40 deg C
：295(W) x 140(H) x 450(D) mm
：12kg
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System
CPU
Display
Mass storage
Hard disk
Floppy disk
Interface
Power requirement
Operating temperature
Physical
Dimensions
Weight
：486DX4 (PC/AT compatible)
：640 x 480 dots, 10.4 inch LCD VGA
：2.0GB (512 data files)
：720KB, 1.44MB (MS-DOS format) (3.5 inch)
：Parallel I/F for the external printer
：12VDC (10.5 - 14V), 1A (standby), 4.0A (max.)
：0 - 45℃
：330(W) x 280(D) x 220(H)mm
：8kg
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G-log-SUS/w ( Data Processing software )
G-log-SUS/w is a data processing software for suspension P-S Logging.
Analytic work such a decision of P&S wave velocity and a plotting to the printer can be done efficiently.
（207KB）
（It is not.）
System diagram
Crosshole measurement use
with hydrophone
Radiation pattern of OWS
Distance of borehole:
about 6m Geology:
Tertiary conglomerate
Example of record by Borehole shuttle
Maximum distance between source and receiver:
220m with non stack
Geology: Tertiary mudstone
Repeatability of wave form
It is available for effective stacking
with good repeatable wave and
stable trigger signal from OWS
