Fugro N.v.

Fnv IP B.v.

Andrew Paul Cowlard

Angus James Stephen Ogilvie

A system for surveying the structure beneath the seabed, comprising: a survey vessel; a streamer comprising a cable, a first set of Nsensor groups positioned at a first end portion of the cable, the sensor groups of the first set being spaced from each other by a group interval, and a second set of Nsensor groups positioned at a second end portion of the cable, the sensor groups of the second set being spaced from each other by the group interval; a sound source; wherein, when the system is in use, the survey vessel travels at a predetermined speed, towing the streamer and the sound source such that the sound source is positioned adjacent an intermediate portion of the cable between the first and second end portions of the cable; the sound source sends acoustic pulses at a predetermined period between pulses towards the seabed such that reflections are produced towards both the first set of sensor groups and the second set of sensor groups; and the speed of the survey vessel and the predetermined period of the sound source are selected such that the shot point interval of the sound source equals the group interval.

Marine surveying

Disclosed is a system for acoustically exploring structure of a floor below a water body. The system can comprise a vessel, at least one streamer placed in the water and towed by the vessel. The system can also comprise a plurality of acoustic sensors positioned at regular intervals along the length of the streamer. The longitudinal direction of the streamer can make an angle with the horizontal. The system can also comprise a source for generating acoustic pulses placed in the water and towed by the vessel using a tow line. The tow line can have such length that the horizontal distance between the vessel and the source is larger than the horizontal distance between the vessel and the first sensor closest to the vessel and smaller than the horizontal distance between the vessel and the last sensor most remote from the vessel.

Growing community of inventors

Wallingford, United Kingdom

Andrew Paul Cowlard