Abstract

In a thermal Enhanced Oil Recovery project of Kuwait, the static reservoir description uncertainties were identified based on initial static description. The associated development impact and possible risks to the project is then evaluated using a commercial uncertainty analysis tool through simulation studies. Field dynamic testing results from the ongoing Cyclic Steam Stimulation(CSS) pilots and other dynamic testing data were then used to evaluate the static description uncertainties, for an improved reservoir description.

The observation from the study is extremely important in not only having an improved understanding of the reservoir description of the subject field but has wider implications in similar reservoir set ups in other parts of the globe. The observations from the pilot operation and simulation history matching clearly demonstrates that local reservoir set up plays a crucial role in each thermal project and understanding them is extremely important for success of the project. The results of the study demonstrate the importance of integrating dynamic cyclic steam stimulation testing results with preliminary static description, to arrive at an improved reservoir description.

The technology of thermal Enhanced Oil Recovery (EOR) is an old concept but its application in different reservoir set ups give rise to new learning that widens the knowledge base in the industry. The reservoir being developed in Kuwait is considered a challenging one from many of the classical screening concepts. The success of some of the experiments tried in this project and the learning from their success has wider potentials in similar complex thermal developments.

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