Direct Hydrocarbon Indicator (DHI)
A direct hydrocarbon indicator (DHI), is any seismic attribute that indicates the presence of hydrocarbons. DHIs are particularly useful in hydrocarbon exploration for reducing the risk of exploration wells. DHIs most commonly occur as bright spots, a local high amplitude anomaly which are displayed with bright colors so as to stand out from background amplitude variation, or as flat spots, which are horizontal reflectors that cross existing stratigraphy and indicate a hydrocarbon fluid level within an oil or gas reservoir.
