Discussions about horizon calibration based on well-log synthetic seismogram.
Cnpc Key · 2008
Horizon calibration based on well-log synthetic seismogram is the bridge connecting geophysics,geology,and logging.It uses seismic data to do the basic work for structure interpretation,res- ervoir analysis and description.Signals on time migration seismic traces are from the reflection of layers on imaging ray traces,not from the reflection of the layers below.The reflection on synthetic seismogram and well-side seismic traces deviates horizontally.The synthetic seismogram based on 1-D convolution model does not con- sider the effect of multiples and converted wave,which is different from the well-side seismic traces on wave field.Well-side seismic traces and synthetic seismogram are generated in different ways, with the former one being generated from seismic data processing including NMO,pre-stack and post-stack imaging,and the latter one being generated from 1-D convolution.Therefore,seismic in- terpreters should recognize and face up to the difference between the two ones while new methods for synthetic seismogram are re- searched and developed and make use of geologic information for in- tegrated horizon calibration.