Amplitude variations with offset of pressure-seal reflections

摘要

Knowledge of pressure compartments is essential for identifying potential risks in advance of drilling and in understanding the mechanism of hydrocarbon trapping and migration. These compartments are bounded by pressure seals which, under certain conditions, can be detected and characterized with seismic reflection data. Use of prestack seismic data requires the analysis of re- Flections generated at the pressure seals, such as the top Of a reservoir, rather than the properties of the rock Volume. In this sense, amplitude variations with offset (AVO) techniques can be a good tool to obtain infor- mation from such pressure seals or pressure transition zones.