Seismic Products

GeoEel Digital Seismic Streamer System

The GEOEEL series of digital towed hydrophone streamers are the first small diameter arrays with the performance of larger systems. With a diameter of only 41mm, the GEOEEL is easy to deploy, easy to transport and largely immune from the noise, leakage and ground loops that plague the installation of analog streamers in a marine environment.

The GEOEEL is filled with inert silicon oil which makes it environmentally safe. Thick 1/8" abrasion resistant polyurethane keeps the streamer extremely rugged but still flexible enough to deploy by hand or mount on small winches. And the GEOEEL is easy to repair – no fragile fiber optics to break or go bad.

Sampling intervals of 4 ms to 1/16 ms make the GEOEEL suitable for deep petroleum, high-resolution engineering surveys or even sub-bottom profiling. Near-zero dead time makes surveys fast and efficient. A built-in digitally controlled oscillator provides calibration test signals for each channel. Other tests include noise, offset, pulse test, timing, leakage and capacitance of hydrophone elements

.The GEOEEL transmits data via fast Ethernet to Geometrics CNT-1 controller, running field-proven software that is used on over 40 vessels today. And the GEOEEL is entirely built by Geometrics, known for over 30 years as an industry leader in rugged, reliable and well-supported instrumentation.

I. Features:
  • Configurable with up to 240 channels
  • Digital Streamer Means Better Quality Data, Less Time Deploying System
  • Comparable In Price To Analog Systems
  • Light Weight, Easy To Deploy On Small Boats
  • 4 ms to 1/16 ms Sampling Means Suitability For More Kinds of Surveys
  • 24-Bit, 110 dB Dynamic Range
  • Automatic Configuration and Fully Self-Testing
  • Small Diameter (41 mm, 1.6") Means Easy Deployment by Hand or With Small Winches
  • Easily Shippable, No Special Environmental Requirements, Filled with Inert Silicon Oil
  • Rugged, 1/8" Wall Thickness, Can Be Used As Bay Cable, Transition Zones
  • Multiple Streamer Configuration
  • Works with Standard Birds
  • Uses Geometrics CNT-1 PC Controller
    • Separate Windows Display Shots, Gathers, Trigger Timing, Noise, Gun Energy, Tape Status, Alarms
    • Real-Time Brute Stack
    • Multiple Storage Devices
    • Integrates Data from Sources, Nav, Birds
    • Drives Multiple Printers
  • Suitable for wide range of surveys
    • Oil and Gas, Gas Hydrates
    • High-resolution engineering surveys
    • Large channels, up to 240
    • Small channels, hand deployed
    • Sub-Bottom profiling
    • Uses any impulsive source

II. Configurations:

A. Configuration 1: GeoEel in-water digitization system - A/D done in the streamer

Standard active section configurations include:

  • 1.5625m group interval, 8 channels per section, software programmable to 3.125, 6.25, 12.5 and 25m group intervals
  • 3.125 m group interval, 8 channels per section, software programmable to 6.25, 12.5 and 25m group intervals
  • 6.25 m group interval, 8 channels per section, software programmable to 12.5 and 25m group intervals
  • 12.5 m group interval, 8 channels per section, software programmable to 25m group intervals
  • 25 m group interval, 4 channels per section

PC Controller: Data collected using any suitable PC based computer. Data transferred by Ethernet

B. Configuration 2: GeoEel 'Convertible' on-deck digitization with existing analog streamers
GEC Rack 1

Still have a stock of analog sections with lots of life left in them? Not sure that it is time to make the move to a fully digital system? GeoEel digital electronics can be packaged in a rugged 'convertible' rack chassis. Each rack mount chassis is controlled by its own Ethernet connection, ensuring fast cycle time and low dead time. The software and hardware functionality is identical to the full in-water digital configuration. Interface modules like charge-coupled amplifiers may be available for your system. Please contact the factory to discuss compatibility.

When you are ready to retire your analog system, the electronics can be reassembled in GeoEel waterproof canisters, ready to attach to your new digital hydrophone sections to make a complete, modern digital marine seismic system - at about ½ the price.

The GeoEel convertible is even fast enough to record continuously and synchonize to GPS, ideal for monitoring or multiple source configurations.
GEC Backplane

Use the GeoEel 'Convertible' with your existing analog streamer

When its time to replace your old analog sections the GeoEel boards are redeployed in the waterproof canisters used in the in-water digital streamer Nothing is wasted!
GEC Model
GEC In Water Model

III. Software:

The GeoEel Digital Streamer uses CNT-1 controller marine software that has been honed by years at sea. By listening closely and responding quickly to the requests of customers and their clients, the CNT has features that provide timely and accurate information to maximize data quality and minimize down time.The CNT software has been inspected by Shell Petroleum and has been approved for their surveys.

  • Bulletproof: stable, proven software with years of survey time
  • Industry standard: over 50 systems in operation; ask for our customer list
  • Separate, user definable windows monitor each process
    • shot display
    • fixed offset gather
    • real-time brute stack
    • tape status on all drives
    • interactive observer's log
    • gun energy bar graph
    • trigger timing bar graph
    • spectral analysis
  • Real-time waterfall and bar graph noise displays.
  • Auto-switching of up to 6 tape drives, dual tape writing.
  • Visual and audible operator--defineable alarms.
  • "Sure-Save" algorithm eliminates lost shots, keeps data sequential even when all tape  drives fail.
  • Real-time integration of navigation, gun and streamer positioning data to tape header.
  • Recording parameters changeable during acquisition
  • Drives multiple printers
  • Fully automated test testing with separate factory grade oscillator

download trial software with 96 channel sample data - 50 mB