Description
Function for 3D data enhancement using common offset MultiFocusing approximation
This procedure produces pre-stack seismic data with enhanced signal-to-noise ratio. This done by partial stacking of the pre-stack data in some vicinity using optimal parameters of the MultiFocusing.This procedure can be used for data regularization due to the fact that MultiFocusing approach doesn’t required CMP symmetry and time correction can be calculated for free imaging point within the acquisition.
Input data – 3D CO-MF database, Pre-stack data. Output geometry.
Output data – Enhanced pre-stack data.
Input data
Output file name
Output file name
Storage file 3D-CO
SEG-Y data handle
Input sorted headers(of seismic data)
Output sorted headers (of synthetic acquisition)
Input BinGrid
Output BinGrid
G3DPickingItem
Velocity picking constrain that will be used during the data enhancement
V0 Map
Parameters
Create NMO corrected gathers
The output pre-stack data will be NMO corrected
MF emulation mute
Image creation parameters
Mute type
Type of applied MF mute function:
•Use mute factor– Will be used single value of MF mute function (see Parameterization-MF Engine)
•Use mute function–MF mute function will be taken from database and will be same as was used during MF calculation
MuteFactor
Value of MF mute function used in case Use mute factor selected
CO aperture mode
Kill empty traces
Interpolation properties
Interpolation method
Kriging covariance type
Kriging range
Kriging number of points
Distance For Trace Selection
Parameters of data selection both pre-stack and MF parameters
MF Trace Selection
Parameters for selection of MF parameters:
Max Distance To MF CMP
Maximum distance from CMP location of the enhanced trace to nearest MF imaging point where the parameters for enhancement are taken
Max Distance To MF CO Trace
Maximum difference in offset of the enhanced trace and CO-MF offset class where the parameters for enhancement are taken
Maximum number of used MF Bins
Raw Data
Parameters for selection of pre-stack seismic data that will be used for partial summation. There are 2 stages of data selection first in CMP domain and second in offset:
Decimation Factor
•Factor for data decimation with preservation of offset-azimuth distribution
Max Distance To CMP
•Maximum distance from CMP location of the enhanced trace to the CMP that will be used for partial summation (first stage of trace selection)
Max Distance To CS-CR
•Maximum distance from source and receiver of the enhancing trace to the source-receivers that will be used in partial summation (second stage of trace selection)
Symmetrical aperture
Use dynamic window
Dynamic selection of the interpolation window. Starts from 0 and dynamically increased up to "interpolation window length" for looking first non zero value
Interpolation Window Length
Stabilisation Window Length
Write mode
Mode of writing output SEG-Y file can be direct or append, for more information look "Save SEG-Y"