Abstract

The fluid factor (ΔF), Poisson Impedance (PI) and lambda-rho (λρ) are three seismic attributes commonly used for pore-fluid discrimination. While it is debated that one attribute is a better pore-fluid discriminator than the other, their sensitivity to pore fluid is not significantly different because the sensitivity of the three attributes are directly related to PI. In addition, the sensitivity of the three attributes is increased if attribute calibration is finalized in the horizon domain. The effectiveness of each attribute was tested for unconsolidated sediments in the Gulf of Mexico and consolidated sediments in the Southern Gas Basin of the North Sea. However, in the Paleozoic consolidated sediments of SGB, the extra sensitivity of the impedance attributes (PI andλρ) appear to be needed for a robust estimate of pore fluid.

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