Multichannel seismic system

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1 Multichannel seismic system Multichannel digital streamer: Sentinel SERCEL Hydrophones per channel: 8 Channel length: 12.5 metres Max. Number of traces: 2 x 240 Active section: up to 6000 meters Total length: 6360 meters Operational depth: up to50 meters Umbilical: 250 metres Tail buoy rope: 75 metres Streamer Winch: 2 x Ibercisa Dimensions: 20 feet footprint base Height: 4240 m Weight with 3000 m streamer: 35 Tn. Powered by hydraulic system. Recording system: SEAL 408XL Seismic files: SEG D, format IEEE 32 bit Recording length: by operator Sample rate: 0.25 a 2 mseg. Analog filter band pass High-Low frequencies Applied digital filters Hardware filter limit: 3 Hz Auxiliary recording channels:3 (FTB, CTB, WB) Real time quality control system interface esqc-pro by SERCEL. 1

2 Streamer position control: Birds Nautilus Manufacturer: SERCEL 3D Omnidirectional control of the streamer. Fully integration of operation mode to recording system: depth, posiotion, acoustics and telemetry. Internal battery to allow operational independence. Quick assambly and fully compatibility with Sentinel streamer. Safety system compass-airbags: OYO GEOSPACE compass Model: SRD-500S Technical specifications: Buoyancy in Water: 1.8 kg (4.0 lbs.) Weight in Air: 8.2 kg (18 lbs.) Maximum Lift: 227 kg (500 lbs.) Gas Source: CO² Activator: Electronically Activated Squib Fixed Activation: 70 psi pressure or 48 meters seawater Batteries: 2 each, 3 volt Extended Life, Non-Magnetic Lithium 2

3 Tail buoy: SEAMAP Manufacturer: PARTNERPLAST Model: 800L Mini Tail buoy assembled by SEAMAP The Seamap Integrated Tailbuoy consists of a Polystyrene hull to provide floatation, a towing bridle to attach to the tow cable, a waterproof connector to connect to a source of power and telemetry wires, a BuoyLink GPS receiver, a marine rechargeable battery and a navigation hazard strobe light. RGPS System: SEAMAP Manufacturer: Novatel Model: OEM 04 RTK Nav. system: Ex-Gate, Ex-Demux Positioning data transmision by radio UHF frequency. Precission: meters. Max. radio transmision range: 12 km. Navegation system: GPS FEI-Zyfer GPStarplus Time and Frequency System Time accuracy: 1μseg daily Clock Resolution: 1ns UTC time Pulse width: 2ms BNC data pulse connection 3

4 Integrated Navigation System: EIVA. The EIVA software product suite comprises software for all aspects of marine surveying, from integrated navigation and data acquisition through post-processing and final charting. This software integrates the data from the in sea equipment (GPSs, vessel, source compass, birds, tail buoy, ) to calculate the geometry of the scenery. 4

5 High presure system: LMF Model: 2 x 25/ E First stage presure: 1,013 bar - 14,65 psi Final download presure: 140 bar psi Max.air volume: 25 m³/min cfm Compressor cicling: 1000 rpm Cooling system: closed circuit Cooling flow: 87 m³/h Seismic Source: GGUN-II & GIguns Manufacturer: SERCEL Volumes of shooting chambers: 4 x 45 cu.in., 4 x 70 cu.in., 4 x 90 cu.in., 8 x 150 cu.in., 4 x 250 cu.in., 4 x 380 cu.in., 4 x 520 cu. in. Working effective presure: p.s.i. Gun controller: Real Time Systems Model: Big Shot v 2.61 Available airguns: Bolt, Sercel, ION Sleeve Presure sensors per string: 2 x A & G Sincronized aiguns per module: up to 96 Depth sensors: A & G Sincronization accuracy: +/- 0.1 ms. Airguns by power supply: up to 8 5

6 Seismic source frame: UTM 2 x Seismic structures Source deployment: OBSs scenary up to 3 strings x 10 aiguns. MCS scenary up to 2 strings x 10 airguns. 6

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