1. Objectives of Well-Seismic Ties
Well-seismic ties allow well data, measured in units of depth, to be compared to seismic data, measured in units of time
This allows us to relate horizon tops identified in a well with specific reflections on the seismic section
We use sonic and density well logs to generate a synthetic seismic trace
The synthetic trace is compared to the real seismic data collected near the well location
Synthetic Trace
SLIDE 3
The objectives for performing a well-seismic tie are listed here
Wells, of course, are registered in units of depth – feet or meters
Seismic data is recorded and usually worked with a vertical scale of 2-way travel time
To relate well data to seismic data, and vice versa, we have to handle this change in vertical scale units
Thus:
Well-seismic ties allow well data, measured in units of depth, to be compared to seismic data, measured in units of time
This allows us to relate horizon tops identified in a well with specific reflections on the seismic section
We use sonic and density well logs to generate a synthetic seismic trace
The synthetic trace is compared to the real seismic data collected near the well location
The well-seismic tie is the bridge we need to go from seismic “wiggles” to the rocks that produced the “wiggles” and our interpretation of the subsurface geology
Courtesy of ExxonMobil
L 7 – Well-Seismic 1