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METHODS FOR ACCURATELY POSITIONING A SEISMIC ENERGY SOURCE WHILE RECORDING SEISMIC DATA
METHODS FOR ACCURATELY POSITIONING A SEISMIC ENERGY SOURCE WHILE RECORDING SEISMIC DATA
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机译：记录地震数据时准确定位地震能量源的方法
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摘要
ABSTRACT OF THE DISCLOSUREMethods for maintaining a steerable paravanesupported seismic energy source, as an air gun, positionedlaterally at a precise constant predetermined distance froma geophone mounted on a submerged geophone streamer cablewhile recording offshore marine seismic reflection data froma seismic tow system including electrical controls on arecording boat for towing the paravane and geophone streamercable are disclosed.Two modifications of an offshore maring seismicenergy source tow system are also disclosed. Both systems com-prise transmitters and receivers therein for continuouslymeasuring the distance between a vessel towed submergedgeophone streamer cable and a towed seismic air gun support-ing paravane on each side of the streamer cable for generatingand transmitting corrective steering signals to the paravanefor maintaining each seismic air gun spaced from the towedsubmerged geophones at an exact predetermined distance forproducing more accurate seismic velocity measurements. Oneembodiment has the acoustic transmitter on the geophonestreamer cable and an accoustic receiver on each paravane inline with the transmitter, and a second embodiment has anacoustic transmitter on each paravane and a correspondingaccoustic receiver for each paravane on the geophone streamercable transversely of the transmitter. Methods for assem-bling the above two systems are disclosed.
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