Publications

An accurate reservoir and play model impacts revenue by seeking improvements in sweep efficiency through a reservoir, hence optimisation of the drilling program, saving money and time in an offshore situation. However, the value of information from a thorough analysis of image logs is all too often underestimated due to the perceived low value and high cost of such studies. To reach expectations and minimise costs, a meticulous study methodology is necessary. Such a methodology is demonstrated in this paper within the context of deepwater depositional environments. The primary tools used for interpretation of dips include dip and dip-azimuth tadpole versus depth plots, stereoplots, and dip-vector plots. Dip information together with image fabric and bed-thickness information is used to subdivide the deposits of mass-flow processes into a number of architectural elements of differing scale and timeframe. An analysis of synsedimentary slumping provides information on slope orientation, and when integrated with seismic confirms depositional models and reservoir geometry. Image facies can be calibrated with petrophysical parameters to define flow units.