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In many cases, seismic data show indications of shallow gas accumulations above salt domes. Faults created by the upward movement of the salt are believed to act as hydrocarbon migration pathways. This involves a risk of leakage from the deeper reservoirs. Gas chimneys may provide additional indications on the risk of leakage of hydrocarbons from deeper reservoirs.

To enable the mapping of gas chimneys in a consistent manner, a method for the detection of chimneys in post-stack 3D seismic data has been developed. This recently developed method makes use of multiple seismic attributes and neural network technology. The output,...

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