In a 3-D seismic survey, we acquired data over an 8-mi2 section of Cut Bank field, located on the west flank of Sweetgrass Arch in Glacier County, Montana. The main objective of the study was to improve the results of an ongoing waterflood program.

A multidisciplinary reservoir-characterization study of the Ellenburger Group was conducted over a 176-mi2 3-D seismic grid in Pecos, Reeves, and Ward Counties in the southern Delaware Basin of West Texas.

A fundamental thesis of seismic stratigraphy is that seismic reflections follow impedance contrasts that coincide with stratal surfaces, which are surfaces where depositional processes occur at a fixed moment in geologic time.

Seismic interpreters must have a reliable methodology that allows them to (1) correlate seismic reflection events with well-log-defined sequence boundaries and (2) specify which seismic facies windows correspond to the rock facies intervals defined by well control.

The basic geometry of an onshore three-dimensional (3-D) seismic recording grid is based on five parameters: source-station spacing, receiver-station spacing, source-line spacing. receiver-line spacing, and recording swath size.

This report presents three types of evidence documenting that the combination of P-wave and S-wave seismic data provides geologic insights that cannot be provided by conventional P-wave data alone.