Effects of Anisotropy on Time-Depth Conversion of Seismic Exploration Signals
Thomsen's rock parameters are applied to calculate and analyze the effects of rock anisotropy on the phase velocity,energy velocity,and time-depth conversion of seismic exploration signals.The calculated results show that:the energy velocity of P wave propagating along the asymmetric-axis direction of transverse isotropy with a verticalaxis of symmetry media can be lower than the phase velocity in the symmetric-axis direction,while that of SV wave propagating along the asymmetric-axis direction is consistently greater than or equal to the phase velocity in symmetric-axis direction;If the rock anisotropy is ignorable or the difference between en-ergy velocity and phase velocity is ignored when considering anisotropy,errors will be introduced in the time-depth conversion of seismic exploration signals,i.e.,the travel time of the seismic exploration signal cannot be precisely inverted to correspond with the geological structure of subsurface strata.
NETL
NSTL
万方数据
维普
