Detection of hydrocarbons using non-bright-spot seismic techniques

Interpretation technology for the direct detection of hydrocarbons with stacked seismic reflections is focused mainly on bright spot systems in which the acoustic impedance of the reservoir is lower than the overburden and underburden. Interpretation of polarity reversal and dim spot systems, in which the acoustic impedance of the reservoir is higher than the overburden or underburden, requires the interpreter to use a different and more complicated set of rules to validate these as direct hydrocarbon indicators.