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7th Middle East Geosciences Conference and Exhibition
Manama, Bahrain
March 27-29, 2006
Chevron, 19718 Laurel Park Lane, Houston, TX 77094, phone: 713-854-6994, [email protected]
Inversion of seismic data into acoustic impedance provides a natural tie to the log
impedance data and forces the
geoscientist, in analyzing seismic data, to extract appropriate wavelets, determine the phase and amplitude of the data,
determine whether or not the phase is stable throughout the volume, and very intimately tie the
well
log
impedance data to
the seismic data. Utilizing inverted data at the beginning of the interpretation process requires that the geoscientist
understand the rock properties in their target area before embarking on an “attribute” interpretation. Even when the P
impedance data do not clearly distinguish between fluids or lithologies, value is added by using these data as the first
interpretation tool. The simplicity in knowing that the change of values represents a change in rock properties without the
complexity of wavelet variability is a distinct advantage to the interpreter and the
sequence
stratigrapher. This initial process
is critical to undertaking any interpretation of seismic data. Inverted data, a layer property, are a more intuitive geologic tool
that allows interpreters to utilize their natural ability to “see” the geology in the seismic data.
This presentation will demonstrate the necessity for inversion and explain why it is beneficial in an interpretation and
sequence
stratigraphic workflow. It will examine both the strengths and drawbacks of using inverted data as compared with
the seismic data and the original rock data. It will also show: