To realize the potential of heavy oil assets in achieving the long term production targets of Kuwait Oil Company (KOC), various pilots are currently under operation. This paper provides an overview of a recent multi-pattern pilot under steam injection to evaluate reservoir potential and to reduce the uncertainties in future investments. The implementation of a comprehensive surveillance plan is described and the early results of the pilot are discussed.

Analytical techniques, statistical methods and engineering tools have been implemented to understand the reservoir performance and to evaluate operational variables. These techniques include injectivity analysis, pressure transient analysis, and multivariate analysis of production data.

The size of steam chest is estimated by indirect techniques such as pressure fall off test which have been qualitatively confirmed by analytical methods. The analysis includes integration with other techniques such as seismic data and Distributed Temperature Sensing (DTS) in observation wells. Modified Hall plots for steam injection were used to evaluate the possibility of formation parting, where further insight was gained from interpretation of anomalous signatures in the modified Hall plots for some wells. It is also shown that the impact of steam injection volume on reservoir response could be better understood by multivariate statistical analysis where numerous parameters influence the results.

This work presents the early results and shares the experience of operating a thermal pilot in the Middle East where limited thermal heavy oil operations exist.

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