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Line 50: − + − {| class = "wikitable"+ − |-+ − ! Step+ − ! Action+ − |-+ − | 1 − | Edit the sonic and density logs for bad intervals. − |- − | 2 − | Calculate vertical reflection times. − |- − | 3 − | Calculate reflection coefficients, R<sub>o</sub> . − |- − | 4 − | Combine the last two items to create a reflection coefficient time series. − |- − | 5 − | Convolve the reflection coefficient series with the wavelet. − |}
→Creating a synthetic seismogram
| isbn = 0-89181-602-X
| isbn = 0-89181-602-X
}}
}}
Once a stratigraphic model has been built using velocities and densities, a synthetic seismogram (or synthetic) can be constructed to identify seismic reflections. A synthetic seismogram is the fundamental link between well data and seismic data, and it is the main tool (along with a [[Checkshots_and_vertical_seismic_profiles#Vertical_seismic_profiles|vertical seismic profile [VSP]]], if available) that allows geological picks to be associated with reflections in the seismic data. As discussed, if a VSP is available for a particular well, a synthetic is not needed. The VSP directly measures both time and depth to a formation of interest. Usually synthetic seismograms are created using specialized software. The user may be unaware of the process that creates them. The table below lists the steps necessary to create a synthetic seismogram manually.
Once a stratigraphic model has been built using velocities and densities, a synthetic seismogram (or synthetic) can be constructed to identify seismic reflections. A synthetic seismogram is the fundamental link between well data and seismic data, and it is the main tool (along with a [[Checkshots_and_vertical_seismic_profiles#Vertical_seismic_profiles|vertical seismic profile [VSP]]], if available) that allows geological picks to be associated with reflections in the seismic data. As discussed, if a VSP is available for a particular well, a synthetic is not needed. The VSP directly measures both time and depth to a formation of interest. Usually synthetic seismograms are created using specialized software. The user may be unaware of the process that creates them. The steps necessary to create a synthetic seismogram manually are described below:
# Edit the sonic and density logs for bad intervals.
# Calculate vertical reflection times.
# Calculate reflection coefficients, R<sub>o</sub> .
# Combine the last two items to create a reflection coefficient time series.
# Convolve the reflection coefficient series with the wavelet.
==Reflection coefficient==
==Reflection coefficient==