Special Report: Seismic, well data used to estimate pore pressure, predict overpressure

An attempt has been made using seismic and well data to predict the possible overpressure zones and pore pressure estimation for the principal reservoir, the Sui Main limestone formation, at Qadirpur, a producing gas field in Pakistan’s Central Indus basin.In seismic data, interval velocities are used in the form of iso-interval velocity section for predicting overpressure zones by observing velocity drop (crest) and rise (trough) in different zones and marked high-pressure zones where a velocity drop occurred. The velocity drop observed in an interval velocity contour map is an indicator of hydrocarbons in that zone. This hypothesis is also confirmed by existing producing wells in ...

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