f Borehole stoneley wave propagatoin across heterogeneous and permeable structures

Fractures or permeable structures in reservoirs are of great importance in the exploration and production of hydrocarbons. Heterogeneous layers in the formation are also of major significance. A very good example of such heterogeneous and permeable structures are the sand-shale sequence found in sedimentary fonnations. Full wavefone acoustic logging offers an effective tooI for characterizing these structures.