Patent ID: 6944094

Claim:
A high resolution method for measuring seismic polar anisotropy in-situ in a region of interest characterized by geological formation elements that reflect sonic energy, comprising the steps of: (a) using a sonic energy source located in a borehole to input sonic energy into the subsurface of the region of interest; (b) recording sonic energy from step (a) reflected from the subsurface of the region of interest by using a plurality of sonic receivers that are located in said borehole that is located in the subsurface of the region of interest; said borehole having an axis that is at a known acute angle relative to at least one of the geological formation elements of said region; and (c) interpreting said recorded sonic energy of said receivers in terms of both the direct raypaths from said source to said receivers and the indirect reflected raypaths from said source to said receivers to obtain a measure of the seismic polar anisotropy parameters V 0 , η, and δ.