Abstract

Elastic rock properties carries important information and link with subsurface lithology and pore fluid content. It is highly valued by the seismic exploration industry. In traditional seismic, only the P-wave was considered to provide useful information, and the other waves were considered to be noise. However the different vibrational modes of these waves mean that they respond differently to changes in subsurface rock properties. The P-wave is sensitive to both, the fabric of the rock and also to the fluid content of the pore spaces. On the other hand, the shear wave is largely insensitive to the fluid content. Thus the two wave types carry different information about the subsurface. This is the prime motivation for the joint recording, processing and analysis of both compressional and shear waves. Presently converted seismic waves (P-to-S on reflection at seismic interface) are being increasingly used to explore for subsurface desired targets. Rapid advancements in multicomponent data acquisition methods and processing techniques have led to numerous applications for P&S images. Uses that have arisen include sand/shale differentiation, carbonate facies identification, definition of interfaces with low Pwave contrast, anisotropy analysis, imaging through gas zones, shallow high resolution imaging, and reservoir imaging. The present study presents the application of multicomponent data in Gandhar field of Cambay basin, which aims to delineate different sand reservoir of Hazad members of Ankleshwar formation.