RAPID EVALUATION OF RESERVOIR CONNECTIVITY IN A MULTI-STACKED SANDSTONE RESERVOIR FOR IMPROVE OIL RECOVERY PURPOSES

Summary This paper presents rapid techniques of reservoir connectivity evaluation in a mature oilfield with multi-stacked sandstone reservoir and recovery process involving waterflooding, through production and injection data analyses. The issue in waterflooding here is to understand the influence of water injection to oil production in complex reservoir geology. Hence, accurate interpretation of reservoir connectivity is critical to have high flow efficiency. Prudent reservoir management often requires fast solution to evaluate and subsequently improve the efficiency of the on-going waterflooding performance and also for tertiary recovery purposes. Therefore, dynamic data analytics workflow applying Pearson’s Correlation Coefficient (PCC) interwell connectivity technique verified with Streamline is proposed. The PCC and Streamline techniques are able to provide rapid framing analysis of reservoir network incorporating production and injection data. Both techniques can identify areas with good or poor connectivity, injection efficiency and barrier/sealing fault in relatively short timeframe (weeks). Identification of these areas can provide important information for reservoir characterization, reservoir dynamic behaviour and reservoir management plans. It can be utilized as an efficient tool for management to decide strategic business decision to improve oil recovery through waterflood optimization and enhanced oil recovery processes.