1 / 47

Sigma TM cableless seismic system

Discover SigmaTM, the world's first Second Generation cable-free seismic system designed for exceptional functionality. This innovative solution combines commercial viability with cutting-edge technical capabilities, establishing a universal system that surpasses traditional cable-based instrumentation. The Sigma system features a rugged 3-channel unit, GPS synchronization, mesh radio networking for quality control, and support for various seismic techniques. Designed for efficiency and precision, Sigma revolutionizes seismic data acquisition while ensuring comprehensive monitoring and reporting systems.

tybalt
Télécharger la présentation

Sigma TM cableless seismic system

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SigmaTM cableless seismic system Confidential

  2. One-stop shop for seismic instrumentation. Confidential

  3. The industry now accepts the idea of cablefree, but: • Waiting for one system to emerge. • WAITING FOR UNIVERSAL (NON-NICHE SYSTEM). • Successful company/system also requires right mix • of commercial and technical capability. Confidential

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

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

  6. iSeis Sigma SAU (summary):- • Ruggedized 3 channel unit (4 GB min memory, expandable – 64 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. Confidential

  7. 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). Confidential

  8. 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). Confidential

  9. iSeis Sigma – sources (summary): • Supports advanced seismic techniques: • Source-driven acquisition. • (SSC., is world’s largest independent development center for vibroseis control R&D). • Multiple Sources: • Dynamite • Vibroseis • Weight Drop (AWD's) • Air Gun. Confidential

  10. 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 Confidential

  11. iSeis Sigma: • Full integration with all Seismic Source Co. hardware and software products for complete turnkey system. Sigma graphical observer screen Source info SAU deployment status Confidential

  12. 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. Confidential

  13. iSeis Sigma: • Full system development and test facilities, incl: • Source and system integration/field testing area. • Environmental testing. • International field support. • International training on • cablefree operations. Confidential

  14. Synchronisation:- • VCXO • GPS • VHF iSeis Sigma: Basic configuration GPS and status LEDs Battery LED Green – Battery Good Orange – Battery Low Red – Battery needs to be charged Status LED Green Flashing – Geophone Test and Instrument Test passed all three channels RED flashing slowly – Geophone Test failed RED Flashing FAST – internal error must send in for repair. Operation Solid GREEN – Passed all initial tests and system is recording Flashing RED then GREEN – Recording but failed Geophone test Flashing Green – PASSED test but not recording Flashing RED – FAILED test and not recording LED OFF _ GPS acquired waiting for time synchronization KCK input (flag) KCK input downline STATUS BATTERY Harvest/PC Ethernet Power #1 Power #2 KCK input upline Confidential

  15. iSeis Sigma: Shoot blind mode SAU Confidential

  16. iSeis Sigma: MRN configuration today SAU Sigma TZ/SM float Confidential

  17. iSeis Sigma: MRN configuration today SAU Sigma TZ/SM float Confidential

  18. 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. Confidential

  19. iSeis Sigma: MRN configuration and deployment. “So easy, a child could do it.” SAU Sigma TZ/SM float Confidential

  20. Mesh-Check Deployment PC (“Jake-box”) or software, can be used:- SAU Observer / CRU Layout crew Trouble shooter Pick-up crew Mesh-Check Deployment PC (“Jake-box”)

  21. 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. Confidential

  22. iSeis Sigma: • MESH-driven acquisition Confidential

  23. iSeis Sigma: Cablefree WiFi mode for data return. Relay SAU Confidential

  24. iSeis Sigma: Cablefree WiFi mode for data return. Relay SAU Confidential

  25. iSeis Sigma: Mixed mode Confidential

  26. iSeis Sigma: Mixed mode Traditional cable telemetry system Confidential

  27. iSeis Sigma: • Sigma™ Multiple Download/Harvesting Options: • 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! Confidential

  28. 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 new • vib techniques with “Sigma Observer” software (TDMA option). TDMA radio upgrade option

  29. iSeis Sigma: Sigma master mode Shows active receivers required and available for each source point.

  30. iSeis Sigma: Sigma master mode Combines with Force2 TDMA radio option to provide widest range of source and recording system control/integration.

  31. Fleet n+1 Fleet n<256 TDMA Radio Option GPS TDMA Radio Option (includes built-in Signature Recorder) Vib- WiFi Vib- WiFi Vib- WiFi Vib- WiFi • TDMA option for existing • vib radios, provides:- • Vib QC, positions & CoG • Vib radio sims • uSec timing accuracy • SPS/XPS operations • Source-driven acqn. Vib QC & status Fleet 1 Fleet n

  32. Sigma – the sum. Putting the pieces together. • 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: • 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.

  33. Sigma – the sum. Typical cable system philosophy Fleet n Source controller All sources ready? Fleet 1 CRU Master clock All channels ready?

  34. Sigma – the sum. Sigma philosophy (no dead time for sources or receivers). Recording accuracy of a few microseconds for sources and receivers. GPS TDMA Radio Option (includes built-in Signature Recorder) Vibs with TBR and/or VSR Mobile or multiple CRU(s)

  35. Sigma – the sum. Sigma philosophy Mesh Radio and/or WiFi for receiver deployment overview. GPS TDMA Radio Option (includes built-in Signature Recorder) Vibs with TBR and/or VSR Mobile or multiple CRU(s) MESH Bridge

  36. Vibroseis: ISS, DS3, Flip-flop, HFVS, Slipsweep etc Seismic channels and sources are free and independent.

  37. Sigma – the summation Receivers Continuous recording with ~microsecond accuracy t

  38. Sigma – the summation Sources Continuous time-break/sweep recording with ~microsecond accuracy t

  39. Sigma – the summation Smart harvesting – putting it all together File generation: Vibroseis, Correlation, Stack etc Time Break Recorders, Signature Recorders, survey, etc

  40. iSeis Sigma: Mixed Sigma mode (cable and cableless) Slave mode (Sercel.)

  41. iSeis Sigma: Mixed Sigma mode (cable and cableless) Slave mode (Aries.)

  42. iSeis Sigma: Mixed Sigma mode (cable and cableless)

  43. iSeis Sigma: • Already proven in the field. Confidential

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

  45. iSeis Sigma: • TZ/shallow water operations. Confidential

  46. Range of seismic equipment solutions, for source control, QC and acquisition.Sigma – 2nd Generation cablefree, for:Stand alone (three modes available). Slaved to other systems. Land, TZ and shallow water. All latest source techniques. Fully integrated.Cablefree is now a universal approach. Confidential

  47. SigmaTM cablefree land seismic system How can we help you? Confidential

More Related