Delineation of a Pressure Fault Seal From Shale Resistivities
Pressure differentials between fault blocks are definitive evidence of a fluid seal across faults. A method is proposed for using log-derived and calculated pressure gradient values to correlate and map pressures on cross sections to delineate pressure differentials across fault zones. These values were calculated and mapped along a known hydrocarbon sealing fault inferred to be a pressure seal in a field from the Gulf of Mexico. The results indicate that this method can generate a detailed picture of the fluid and pressure history to aid in the docu-mentation and prediction of sealing or leaking relationships along fault zones.
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Seals, Traps, and the Petroleum System
This memoir provides the information to help explorationists greatly increase their understanding of seals and traps and thereby markedly improve their ability to forecast hydrocarbon occurrences.