先进的可控震源地震勘探方法
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Wide azimuths
Shot line interval
Symmetric sampling
Receiver interval Shot interval
Solution: dense sampling of s源自文库gnal & noise:
- increase channel count (8,000+ live channels) - increase of the SP density (200+ VP / Km² ) - highly productive VibroSeis (single sweep) - symmetric shot & receiver sampling
Vibrator 1
Active spread 1
Super spread (all deployed channels)
Active spread 2
Super-spread:
Vibrator 2
Absolute spread including several successive spreads
Vibrator guidance 1
Vibrators guided by DGPS No stakes on the shot line
GOTO VP
Vibrator guidance
Vibrator fleets
Recording truck
Vibrator guidance 2
VIBRATE !
Vibrator driven operations
Vibrator digital control system (VE 432):
- VE 432 equips 700+ vibrators worldwide - Digital Pilot Generator (DPG) connected to the recorder - Digital Servo Drive (DSD) for vibrator control & integration
Different VibroSeis methodologies:
DPG
DSD
- Single vibrator fleet operation analysis VE432 - Management of multiple fleets: . alternate sweeps: flip-flop, reduction of listen time . overlapping sweeps: slip-sweep & HPVA . simultaneous sweeps: HFVS - Comparison of these methodologies
. all channels included in the super-spread are acquired . the records belonging to the active spread is sorted using SPS Active With 3 s less 3,000 7,000 5,000 channels delay time, Fixed spread Super spread Rolled spread
Vibrator fleets Vibrator guidance
READY GO STATUS
+ next GPS location
Looking for VP corresponding to COG location
Recording truck
Reduce delay for line forming
VE432-DSD wireless network
Parameter FO CoG Status TB
CoG Status
408UL/428XL
VE432-DPG
- bi-directional radio link (VHF) between vibrators & recorder - real time navigation (DGPS) defines Center of Gravity (CoG) - fleet master triggers sweep as soon as vibrators are ready - recorder provides fire order (FO) & sweep parameters - status of vibrators reported during listen time
The need for high VibroSeis productivity
Industry demand for high resolution 3D seismic:
- reduced bin size (12.5 m x 12.5 m) - very high trace density (up to 1,5 Million/Km² ) - wide azimuthal distribution (anisotropy, illumination..)
Advanced VibroSeis Methodologies
Winterized Nomad 65 in flip-flop mode
BNG, W-Siberia, winter 05 BashNefteGeofisika Western Siberia
Denis MOUGENOT, January 2007
Receiver line interval
How to increase productivity
VibroSeis operations with 408UL/428XL:
- Tight integration of vibrator electronics (VE432) and acquisition equipment has made it possible high productivity thanks to: . vibrator driven operations . vibrator guidance . reduced delay for line forming . real time QC’s of each vibrator
Shot line interval
Symmetric sampling
Receiver interval Shot interval
Solution: dense sampling of s源自文库gnal & noise:
- increase channel count (8,000+ live channels) - increase of the SP density (200+ VP / Km² ) - highly productive VibroSeis (single sweep) - symmetric shot & receiver sampling
Vibrator 1
Active spread 1
Super spread (all deployed channels)
Active spread 2
Super-spread:
Vibrator 2
Absolute spread including several successive spreads
Vibrator guidance 1
Vibrators guided by DGPS No stakes on the shot line
GOTO VP
Vibrator guidance
Vibrator fleets
Recording truck
Vibrator guidance 2
VIBRATE !
Vibrator driven operations
Vibrator digital control system (VE 432):
- VE 432 equips 700+ vibrators worldwide - Digital Pilot Generator (DPG) connected to the recorder - Digital Servo Drive (DSD) for vibrator control & integration
Different VibroSeis methodologies:
DPG
DSD
- Single vibrator fleet operation analysis VE432 - Management of multiple fleets: . alternate sweeps: flip-flop, reduction of listen time . overlapping sweeps: slip-sweep & HPVA . simultaneous sweeps: HFVS - Comparison of these methodologies
. all channels included in the super-spread are acquired . the records belonging to the active spread is sorted using SPS Active With 3 s less 3,000 7,000 5,000 channels delay time, Fixed spread Super spread Rolled spread
Vibrator fleets Vibrator guidance
READY GO STATUS
+ next GPS location
Looking for VP corresponding to COG location
Recording truck
Reduce delay for line forming
VE432-DSD wireless network
Parameter FO CoG Status TB
CoG Status
408UL/428XL
VE432-DPG
- bi-directional radio link (VHF) between vibrators & recorder - real time navigation (DGPS) defines Center of Gravity (CoG) - fleet master triggers sweep as soon as vibrators are ready - recorder provides fire order (FO) & sweep parameters - status of vibrators reported during listen time
The need for high VibroSeis productivity
Industry demand for high resolution 3D seismic:
- reduced bin size (12.5 m x 12.5 m) - very high trace density (up to 1,5 Million/Km² ) - wide azimuthal distribution (anisotropy, illumination..)
Advanced VibroSeis Methodologies
Winterized Nomad 65 in flip-flop mode
BNG, W-Siberia, winter 05 BashNefteGeofisika Western Siberia
Denis MOUGENOT, January 2007
Receiver line interval
How to increase productivity
VibroSeis operations with 408UL/428XL:
- Tight integration of vibrator electronics (VE432) and acquisition equipment has made it possible high productivity thanks to: . vibrator driven operations . vibrator guidance . reduced delay for line forming . real time QC’s of each vibrator