Method and device for controlling source array geometry

摘要

Methods related to controlling a source array while performing a seismic survey to achieve an intended source signature. A current three dimensional arrangement of the individual seismic sources is compared with a target 3D arrangement. In view of the comparison, position of at least one of the individual seismic sources is adjusted so that the adjusted 3D arrangement of the individual seismic sources to substantially match the target 3D arrangement.

主权项

1. A method for reproducing a geometry of a source array used during a previously-conducted seismic survey, the source array having plural sub-arrays, each sub-array including plural individual sources towed using a same umbilical cable, the method comprising:
towing the source array substantially along a sail-line followed during the previously-conducted seismic survey; comparing a current value of one or more parameters related to the geometry of the source array and affecting source's signature, with a corresponding previous value of the one or more parameters during the previously-conducted seismic survey, the current value and the corresponding previous value corresponding to a first location along the sail-line, wherein the one or more parameters include a distance perpendicular to the sail-line in a horizontal lane, between two seismic sub-arrays of the source array, a depth of a sub-array or an angle in the horizontal plane, between sub-array and the sail-line; and adjusting a position of at least one sub-array the source array based on a result of the comparing, to make the current value to substantially match the corresponding previous value.