The petroleum exploration industry uses S-wave vertical seismic profiling (VSP) to determine S-wave velocities from downgoing direct arrivals, and S-wave reflectivities from upgoing waves. Seismic models for quantitative calibration of amplitude variation with offset (AVO) data require S-wave velocity profiles (Castagna et al., 1993). Vertical summations (Hardage, 1983) of the upgoing waves produce S-wave composite traces and enable interpretation of S-wave seismic profile sections. In the simplest application of amplitude anomalies, the coincidence of high amplitude P-wave reflectivity and low amplitude S-wave reflectivity is potentially a direct indicator of the presence of natural gas.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.