bright spot
A bright spot is a seismic amplitude anomaly, or a high amplitude, that can indicate the presence of hydrocarbons. Bright spots result from large changes in acoustic impedance and tuning effect, such as when a gas sand underlies a shale, but they can also be caused by phenomena other than the presence of hydrocarbons, such as a change in lithology. This term is often used synonymously with hydrocarbon indicator.
