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The industry now accepts the idea of cablefree, but:

• Waiting for one system to emerge.

WAITING FOR UNIVERSAL (NON-NICHE SYSTEM).WAITING FOR UNIVERSAL (NON-NICHE SYSTEM).

• Successful company/system also requires right mix of commercial and technical capability.

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Sigma – the sum of cablefree functionality.Sigma – the sum of cablefree functionality.Sigma – world’s only Sigma – world’s only Second Generation Second Generation cablefree system.cablefree system.Sigma – the 3-in-1 recorder.Sigma – the 3-in-1 recorder.

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Sigma – new SAU.Sigma – new SAU.• now under production.now under production.

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iSeis Sigma SAU (summary):-• Ruggedized 3 channel unit (4 GB min memory, expandable – 64 GB). Not limited to 4 GB.Not limited to 4 GB.• GPS PPS signal - used to condition accurate internal clock.• Source trigger accuracy to +/- one microsecond.• Mesh Radio Network (MRN) used during deployment to assign channel number and during recording to check status of SAU, geophones, battery (QC functions).

Cable-less no longer means QC-less.Cable-less no longer means QC-less.

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iSeis Sigma:SAU Specifications: • 3 channels per SAU• 24 bit sigma-delta converters• Dynamic range: 144 dB (system)• Greater than 118 dB (measured at 2 mS)• Bandwidth: DC to 15 KHz• Analog filter flat response to 8,000 Hz• Digital Filter Bandwidth = 0.85 of sample rate• Common Mode Rejection: Greater than 100 dB • Crosstalk: Better than -125 dB• Noise Floor: 0.2 microVolt RMS noise (2 mS sample rate).

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iSeis Sigma:SAU Specifications: • Trigger Accuracy: +/- 1 microsecond at all sample rates• Max. Input Signal: Standard (x4 gain): 1.72 Volts peak to peak • Preamplifier Gains: x4 & x32 standard; remotely selectable • Anti-alias Filters: 85 % of Nyquist frequency• Digital Filters: Low Cut – User selectable frequency • Sample interval: 0.0208, 0.0625, 0.125, 0.250, 0.500, 1.00, 2.00, 4.00, 8.00, 16.00 millisecond (for passive/permanent monitoring as well as conventional recording).

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iSeis Sigma – sources (summary):Supports advanced seismic techniques:

Source-driven acquisition.(SSC., is (SSC., is world’s largest independent development world’s largest independent development center for vibroseis control R&D).center for vibroseis control R&D).Multiple Sources:

• Dynamite • Vibroseis • Weight Drop (AWD's) • Air Gun.

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iSeis Sigma:Supports every advanced seismic technique: • Dynamite, AWB, Airgun

• Manual• Source driven

• Vibroseis (single and flip-flop)• Manual• Source driven

• Slip Sweep• Manual• Source driven• Support for multiple sweeps/VP

• Full support for ISS and DS3 (BP inventions).• Zenseis*, HFVS etc.

*Trademark of ConocoPhillips Corporation

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iSeis Sigma:• Full integration with all Seismic Source Co. hardware and software products for complete turnkey system.

Sigma graphical observer screen

SAU deployment status

Source info

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iSeis Sigma:Sigma integrated Source and Recording Software:• Stakeless survey - automated operation. • Final GPS positions for all source locations.• Complete control of sources and SAUs. • Daily production reports.

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iSeis Sigma:• Full system development and test facilities, incl:

• Source and system integration/field testing area.• Environmental testing.

• International field support.• International training oncablefree operations.

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iSeis Sigma:Basic configuration

KCK input downline

KCK input (flag)

Power #1

Power #2

Harvest/PCEthernet

GPS and status LEDs

Synchronisation:-• VCXO• GPS• VHF

BATTERY

STATUS

Battery LEDGreen – Battery GoodOrange – Battery LowRed – Battery needs to be chargedStatus LED Green Flashing – Geophone Test and Instrument Test passed all three channelsRED flashing slowly – Geophone Test failedRED Flashing FAST – internal error must send in for repair.OperationSolid GREEN – Passed all initial tests and system is recordingFlashing RED then GREEN – Recording but failed Geophone testFlashing Green – PASSED test but not recordingFlashing RED – FAILED test and not recordingLED OFF _ GPS acquired waiting for time synchronization

KCK input upline

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iSeis Sigma:Shoot blind mode

SAU

iSeis Sigma:MRN configuration today

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SAU

Sigma TZ/SM float

iSeis Sigma:MRN configuration today

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SAU

Sigma TZ/SM float

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iSeis Sigma MRN:-• MRN wake-up SAUs, start/stop recording, optimize memory & battery life.• MRN can change globally or box-by-box: preamp and sample rate settings.• Status messages transmitted via MRN includes:

• Recording status• Battery status• RMS noise • Geophone status(leakage, Fn, damping, impedance)• Memory test• GPS status.

SAU files keep track of location.

iSeis Sigma:MRN configuration anddeployment.“So easy, a child could do it.”

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SAU

Sigma TZ/SM float

SAU

Mesh-Check Deployment PC (“Jake-box”)

Mesh-Check Deployment PC (“Jake-box”) or software, can be used:-

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iSeis Sigma MRN deployment:-• During deployment, “Sigma Observer” can be used by layout crew to check mesh connectivity.• Assists in repeater location (if nec).• Reports three strongest MRN neighbours for each location.

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iSeis Sigma:• MESH-driven acquisition

iSeis Sigma:Cablefree WiFi mode for data return.

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SAU

Relay

iSeis Sigma:Cablefree WiFi mode for data return.

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SAU

Relay

iSeis Sigma:Mixed mode

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iSeis Sigma:Mixed mode

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Traditional cable telemetry system

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iSeis Sigma:Sigma™ Multiple Download/Harvesting Options:• No internal battery to worry about!No internal battery to worry about!• * Wi-Fi (direct to CCU or “pass-by download”)• Combined Harvester (office-based)• Portable Mass Harvester (truck-based)• * PC-based Mobile Harvester (man-portable)• * Data Mini-Transporter (man-portable).

* * Download DURING acquisition!Download DURING acquisition!

iSeis Sigma:Sigma master mode

• Impulsive mode: allows max. flexibility with SSC Universal Encoder hook-up, energy saving through MRN remote control.• Vibroseis mode: Can use all newvib techniques with “Sigma Observer” software (TDMA option).

TDMA radio upgrade option

iSeis Sigma:Sigma master mode

Shows active receivers required and available for each source point.

iSeis Sigma:Sigma master mode

Combines with Force2 TDMA radio option to provide widest range of source and recording system control/integration.

Fleet nFleet 1

Fleet n+1

Fleet n<256

GPS

TDMA Radio Option (includes built-in Signature

Recorder)

Vib-WiFi

Vib-WiFi

Vib-WiFi

Vib-WiFi

TDMA Radio Option

Vib QC& status

TDMA option for existing vib radios, provides:-• Vib QC, positions & CoG• Vib radio sims• uSec timing accuracy• SPS/XPS operations• Source-driven acqn.

TDMA option for existing vib radios, provides:-• Vib QC, positions & CoG• Vib radio sims• uSec timing accuracy• SPS/XPS operations• Source-driven acqn.

Sigma – the sum.Putting the pieces together.

Cable systems restrict flexibility by:Cable systems restrict flexibility by:• Forcing sources and receivers to operate as one system.• One may have to wait for the other.

Sigma allows sub-systems to be independent:Sigma allows sub-systems to be independent:• Failure or delay of one part, does not halt the rest.• Improved source-driven acquisition.• Mesh Radio Network permits control over spread if required.• “Harmonisation” of subsystems is only made where necessary.

Sigma – the sum.Typical cable system philosophyTypical cable system philosophy

Fleet n

Fleet 1

CRU

Master clock

Source controller

All sources ready?

All channels ready?

TDMA Radio Option (includes built-in Signature

Recorder)

GPS

Vibs with TBR

and/or VSR

Recording accuracy of a few microseconds for

sources and receivers.

Sigma – the sum.Sigma philosophy (no dead time for sources or receivers).Sigma philosophy (no dead time for sources or receivers).

Mobile or multiple CRU(s)

TDMA Radio Option (includes built-in Signature

Recorder)

GPS

Vibs with TBR

and/or VSR

Sigma – the sum.Sigma philosophySigma philosophyMesh Radio and/or WiFi for receiver deployment overview.Mesh Radio and/or WiFi for receiver deployment overview.

Mobile or multiple CRU(s)

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Vibroseis: ISS, DS3, Flip-flop, HFVS, Slipsweep etcSeismic channels and sources are free and independentSeismic channels and sources are free and independent.

Sigma – the summation

Continuous recording with ~microsecond accuracy

Receivers

Sigma – the summation

Continuous time-break/sweep recording with ~microsecond accuracy

Sources

Sigma – the summationSmart harvesting – putting it all togetherSmart harvesting – putting it all together

Time Break Recorders, Signature Recorders, survey, etc

File g

eneratio

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Vib

roseis,

Co

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, Stack etc

iSeis Sigma:Mixed Sigma mode (cable and cableless)

Slave mode (Sercel.)

iSeis Sigma:Mixed Sigma mode (cable and cableless)

Slave mode (Aries.)

iSeis Sigma:Mixed Sigma mode (cable and cableless)

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iSeis Sigma:• Already proven in the field.

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iSeis Sigma:• Already proven in the field (passive monitoring)

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iSeis Sigma:• TZ/shallow water operations.

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