METHOD OF GEOPHYSICAL EXPLORATION BY ANALYZING SHEAR-WAVE POLARIZATION DIRECTIONS

摘要

A method for geophysical exploration by analyzing shear-wave polarization directions relative to a fixed coordinate frame is disclosed, for either vertical seismic profile data or surface seismic reflection data. Energy in a selected time window of two off-diagonal components is determined, and the source and receiver coordinate frame is then rotated, and energy is again determined. A second rotation of the source and receiver coordinate frame is followed by a third energy determination. A simple trigonometric function equation is generated to fit the determined energy values, and a minimum energy value is determined. The coordinate frame is then rotated by the angle that gives the minimum energy value, so that all of the signal is put on the diagonal components. IMAGE