Issues in Rock Physics and Implications for DHI Interpretation

Seismic techniques for direct hydrocarbon indication rely on the changes in seismic character which accompany changes in pore fluid content. Interpretation and modeling of DHI's require an understanding of the factors affecting seismic velocities and reflection coefficients. which arc in tum dependent on pore fluid properties. rock frame properties. and fluid substitution within a given rock frame. Recent developments in rock physics have greatly increased our general understanding in these areas. but have also revealed complications that require further research.