Saturation estimation using mCSEM data and stochastic petrophysical modeling

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United States of America Patent

PATENT NO 9864086
APP PUB NO 20150369940A1
SERIAL NO

14410111

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A method for estimating saturation using mCSEM data and stochastic petrophysical models by quantifying the average water saturation in a reservoir given the transverse resistance (TR) obtained from mCSEM data, including the following steps: a) obtaining mCSEM survey data from a subsurface region of interest, b) performing an inversion of the obtained mCSEM data, c) subtracting a background resistivity trend from the mCSEM inversion data from the resistivity trend of the mCSEM inversion data from inside a hydrocarbon reservoir, d) estimating the location of an anomaly in the mCSEM inversion data, e) estimating the magnitude of the transverse resistance associated with an anomaly from the mCSEM inversion data, f) estimating an initial average reservoir saturation corresponding to transverse resistance using a stochastic petrophysical model and Monte Carlo simulation connecting reservoir parameters to transverse resistance, and g) integrating the obtained saturation distribution as a function of transverse resistances over the assumed distribution of transverse resistances to obtain a final estimation of the fluid saturation probability.

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Patent OwnerAddress
STATOIL PETROLEUM ASSTAVANGER

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Løseth, Lars Ole Trondheim, NO 3 9
Olsen, Per Atle Trondheim, NO 1 3
Wiik, Torgeir Trondheim, NO 5 7

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