AAPG Middle East Region Geoscience Technology Workshop

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Integrated Core and Log Analysis for Thin Bedded Turbidite Sand Reserves


In order to book reserves, the reserve evaluation processes used must be robust, established in the industry, proven, reliable, calibrated, reproducible and comprehensible by a wide range of evaluation results users and contributors. These extensive requirements may at first seem to stifle innovation, instead, these requirements drive innovations that are long term sustainable. Reserve innovations must be supported by broad and deep datasets and thereby they can pass the most severe long term technical scrutiny. These requirements enforce long term assessment stability, downward compatibility of evolving assessment strategies and the consistency of reserve results that are necessary for the long term nature of petroleum reservoirs and the oil business evaluation time cycles. In this discussion, the author will present a proven integrated work flow for thin bedded turbidite reservoirs for which core and log data are available and well log data alone is generally accepted as inadequate. This workflow will use carefully designed procedures that encompass the full spectrum of petrophysics from core analysis and log analysis while providing additional support for assessment of drainage areas. - Specific supplemental turbidite core description attributes for petrophysical and reservoir drainage area analysis - Laboratory core data specific for turbidites - Integration procedures for the above with the geologic context for analysis of the well logs. The objective of this workflow is clarity and comprehensibility at each and every step in order to achieve coherence in the evaluation as perceived by an integrated evaluation team of diverse professionals and their management.