SeaRay 428. To address the growing demands of the geophysical industry SEABED SEISMIC ACQUISITION

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2 SeaRay 428 // SEABED SEISMIC ACQUISITION To address the growing demands of the geophysical industry for ever larger-channel-count surveys and greater layout flexibility, Sercel has developed the SeaRay 428 designed for competitive redeployable 4-C seabed seismic acquisition. Designed to support most of today s OBC operations down to 500 meters, the SeaRay 428 has also been designed with a smaller and lighter cable option capable of the same operations in water depths of less than 100 meters, where smaller and shallower-draft vessels are commonly deployed. The omni-directional, three-component Digital Sensor Unit (DSU) that is at the heart of the SeaRay 428 provides superior sensor coupling and vector fidelity, and is insensitive to any tilt of the sensor package on the sea floor. With a proven hardware design and a system architecture that features built-in multi-route system power, data telemetry redundancy and continuous acquisition capabilities the SeaRay 428 provides unparalleled flexibility, efficiency, and reliability in the field. 2

3 // IMPROVED DATA QUALITY Multi-component sensor Three orthogonally oriented, digital accelerometers and one hydrophone are integrated to form a single 4-C receiver. The omni-tilt MEMS (Micro Electro Mechanical System) sensor technology brings broad bandwidth, low distortion and extended dynamic range to seabed seismic acquisition. 3C Digital Accelerometer Hydrophone High-channel-count and long-offset acquisition The SeaRay 428 is a high-channel-count system and supports up to C real time deployed in multiple lines. Its low power consumption and high data transmission rate allows for cable lengths of up to more than 35 kilometers. 3

4 // OPERATIONAL EFFICIENCY Battery-less ed directly through the line, the SeaRay 428 does not need any batteries providing unparalleled flexibility and simplicity during deployment and bringing a gain of up to 20% in deployment time. Safety assessment GPS SYNC 1 2 DOUBLED POWER Fault-tolerant architecture The SeaRay 428 offers a high level of redundancy minimizing downtime and increasing system productivity. RAID 5 DATA STORAGE TELEMETRY REROUTING // ADVANCED QUALITY CONTROL 4 E-MAINTENANCE REMOTE TROUBLESHOOTING DATA QC PARAMETER AUDIT

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6 F1 F2 OK ESC Remote Remote Reset Remote Reset Reset Remote Reset ENT EXIT CLR STATUS Recorder QUALITY CONTROL CLIENT REMOTE CLIENT esqc-pro SeaRay 428 SeaRay 428 Seismic Gateway PERIPHERALS Ethernet SERVER SeaRay 428 SERVER PERIPHERALS TAPE DRIVE NAS PLOTTER Fibre Channel (FC-AL) GPS LCI-428 ACQUISITION AXCUL-428 LCI AXCUL BCXU-428 Remote LINE #1 LINE #2 GUNS NAVIGATION Remote Remote LINE #3 LINE #n 6

7 BCXU-428 LINE CONTROLLER High-voltage power-supply Interface between recorder and seabed electronics GPS GPS RECEIVER USED FOR SYSTEM SYNCHRONIZATION Propagation of GPS time reference Tolerance to loss of PPS signal SeaRay 428 SERVER SEISMIC DATA RETRIEVAL, FORMATTING, PROCESSING & EXPORT Red Hat Linux operating system Up to 1.8 TB RAID-5 Disk Feature and power supply redundancy LCI-428 LINE CONTROL INTERFACE Line Management (data management and system testing) Interface to Seabed Server & Navigation Auxillary Channel management AXCUL-428 AUXILIARY CHANNEL UNIT Digitization of analog auxiliary channels Eight-channel Input NAS NETWORK-ATTACHED STORAGE Up to 2TB disk capacity (125hr of seismic data ch@2ms) RAID 1 (mirroning) Disk feature SEISMIC GATEWAY SEABED SERVER NETWORK CONNECTIVITY Unlimited remote access Data Quality Control / Parameter Audit / e-troubleshooting 7

8 Electrical Extender Max 675 m OR DECK CABLE 50 m B2B Optical Extender Max 2400 m B2B TZAC 25 m B2B UP UPTO TO60 60RP RPBETWEEN BETWEEN B2B UP TO 60 RP BETWEEN B2B UP TO 60 RP BETWEEN 8 PACAP

9 TBJ 24m TBC DECK CABLE L IVE SW TAIL FLEXIBLE RECORDER / IN-SEA LINK EXTENDER Interface between BCXU-428 and Aquisition Line Standard length : 50m (up to 100m) ELECTRICAL EXTENDER Length : up to 675m Longer lengths achieved by connecting several extenders together OPTICAL EXTENDER Length : up to 2400m TZAC TRANSITION ZONE ADAPTER CABLE Short SeaRay Adaptor cable Length : less than 100 meters AQAS SeaRay ACTIVE SECTION Data acquisition sections 10 Receiver Point per AQAS Customizable Receiver Point spacing (max 55m) B2B BACK TO BACK ADAPTER Adapter between two active sections Version including mechanical fuse available SEABED LINE UNIT Data routing and power supply of active channels (60 RP max) Data telemetry Repeater 9

10 //SEABED SOFTWARE Data acquisition software Seabed Software is a package that totally controls the seismic instrument spread and operations. It also performs all the requested computations before recording data onto tapes or disks. Taking advantage of its client/server architecture, Seabed Software allows secured remote access through Internet connections. //esqc-pro Quality control software esqc-pro is a powerful integrated tool for real-time QC of seismic data acquisition without interrupting production. Its client/server architecture allows real-time QC display on a remote standard PC through a secure Internet connection. //SGA Signal graphic analyzer SGA is the latest generation of Signal Graphic Analyzer QC Tool. Featuring a new user-friendly graphical interface and being able to work in real-time or standalone mode, SGA can be installed on any computer to perform detailed signals analysis. The software supports a wide range of graphical displays (amplitude, spectrum, distortion, phase, ) and is compatible with the latest SEG-D file revisions (rev 2.1 and 3.0). 10

11 Reset Options //SeaRay LINE TESTER The SeaRay line tester is a complete and autonomous package for cable vessels or workshops providing : Line testing Spread monitoring during cable deployment Troubleshooting for SeaRay sections and in-sea modules The SeaRay Line Tester can also run on a ruggedized laptop for deck monitoring, command and control. LCI-428 LCI CLIENT SERVER BCXU-428 Remote CABLE LINE //UNMANNED SATELLITE RECORDER The unmanned satellite recorder can be deployed onboard a variety of small watercrafts and can be remotely controlled and monitored by key seismic operations personnel centrally located on the master recording or source vessel and/or other locations offshore or onshore. This solution enables greater flexibility during deployment and roll-out while ensuring real-time quality control of all seismic parameters and seismic data. 11

12 A Sercel - France 16 rue de Bel Air B.P CARQUEFOU Cedex Téléphone : (33) Fax : (33) sales.nantes@sercel.com SAS au capital de Siège Social : 16 rue de Bel Air CARQUEFOU R.C.S. Nantes Code APE 2651B Sercel Inc. - U.S.A Park Row Houston, Texas Telephone : (1) Fax : (1) sales.houston@sercel.com Sercel 10/16