Hydrocarbons are increasingly likely to be found in some of the world's most awkward and complex terrains. CGGVeritas is uniquely positioned to overcome the difficulties of conducting surveys in these challenging locations.
Seamless Acquisition
The boundaries between 'land', 'transition zone' and 'marine' are increasingly blurred. From Vibroseis trucks and 3C receivers on land to airguns and 4C cable in the sea, CGGVeritas can provide the full spectrum of acquisition technologies.
Careful processing allows the creation of a single seismic volume, incorporating data from all types of source and receiver.
Shallow Water Experts
The so-called 'transition zone' between land and marine seismic operations encompasses some of the most remote, sensitive and sometimes the most congested environments on the planet.
To operate successfully within these constraints requires specialist expertise and resources. With over 100 transition zone surveys recorded worldwide, CGGVeritas is the partner of choice.
Ocean Bottom vs Towed Streamer
Ocean bottom acquisition, either cables or nodes, provides wide-azimuth multicomponent data with great advantages for exploration, reservoir characterization and identification of drilling hazards.
- Lower noise environment gives improved data quality.
- Working around and beneath surface and subsea infrastructure for improved survey coverage.
- Recording multicomponent S-wave data using geophone sensors in addition to hydrophones, provides:
- additional information from the converted wave (PS) data
- improved P-wave data
- Ability to record data with all azimuths and large offsets, improving illumination.
9C: 3C x 3C
Most multicomponent land data records 3 components, using a P wave source and 3C receivers. It is possible to use one vertical and two orthogonal S wave vibrators, or one tri-axial vibrator, as sources. When recorded by the same 3C receivers this gives a total of 9 components for analysis.
The advantage of 9C over 3C is that 9C data allow all elastic modes to be utilized and analyzed.
