Introduction

A novel methodology for carbonate reservoir characterization based on the empirical relationships between pore types and reservoir parameters has been developed. The method is integrated into a geological framework and therefore gives sedimentological/diagenetic control on reservoir quality distribution. The new methodology is applied to predict pore types, permeability, effective porosity, porosity cut-off, capillary pressures, saturations, HC contacts, FWL and HC volumes. For many of these parameters the expected and P10 to P90 values are predicted, along with the standard deviations. The method can be applied in both production and exploration scenarios and produces detailed input parameters to reservoir modeling. STOOIP/GIIP calculations and sensitivity testing can be carried out in short time based on measured and/or predicted input values at wire-line log resolution and without the need of any vertical up-scaling. The method was accepted by BeicipFran Lab. in a 2012 audit of a producing reservoir, and has been successfully applied to one Russian, four Iranian and four Iraqi oil and gas fields. It has also been applied in the application for the 22nd Norwegian license round and in project evaluation in the Norwegian Sea exploration.

The new pore-type based methodology for characterization of carbonate reservoirs was presented at the SPWLA Abu Dhabi Topical Conference in March 2013. Press the play button of the video below to start the presentation.