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AAPG Middle East Region Geoscience Technology Workshop

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Geologically Consistent Previous HitResolutionNext Hit Enhancement of Petrophysical Analysis Using Image Log Data

Abstract

Very thin, laminated sand-shale sequences pose a challenge to petrophysical evaluation. The poor Previous HitverticalNext Hit Previous HitresolutionNext Hit of the log measurements results in pessimistic estimates of hydrocarbon volumes and producibility. Such formations contain much more hydrocarbon than is apparent from the low resistivity values recorded. Attempts to enhance the Previous HitresolutionNext Hit of the analysis using a high-Previous HitresolutionNext Hit clay indicator – such as an image log – need to account for variations in clay mineralogy and porosity with clay content. We present here a technique to incorporate results of core mineralogy measurements to ensure a geologically consistent Previous HitresolutionTop enhancement of the petrophysical analysis and we compare the results in an actual field example.recovery factor.