Abstract
Reservoir fluid physical property values constitute an integral part of the data required for comprehensive study of the reservoir and for optimal design of oil recovery and production schemes. More specifically, Pressure-Volume-Temperature (PVT) data corresponding to the reservoir fluid are needed to validate the well test property and to provide meaningful interpretation. In the absence of laboratory measured PVT data, property correlations are used for property estimation. Various PVT correlations have been published over the years, which used data from limited geographical areas, sometimes assumed to be global and differing fluid characteristics. Because of variation in the crude compositions, geographical, and petrophysical conditions of the operating environments, these correlations cannot acclaim universal applicability. This paper attempts to give comprehensive review of existing PVT correlations and models in the literature, indicating geographical region, accuracies as well as the nature of these correlations. Using these correlations from other regions would have implications such as poor fluid property estimations, poor reservoir performance studies, as well as uncertainty in reserve estimations in the Niger Delta. Keywords: PVT Correlations, PVT Data, Reservoir Fluid Properties, Fluid Property EstimationGlobal Journal of Pure and Applied Sciences Vol. 14 (3) 2008: pp. 331-338
Highlights
Reservoir fluid physical property values constitute an integral part of the data required for comprehensive study of the reservoir and for optimal design of oil recovery and production schemes
PVT data corresponding to the reservoir fluid are needed to validate the well test property and to provide meaningful interpretation
The results showed that the developed model provided better predictions and higher accuracy than the published empirical correlations
Summary
Reservoir fluid physical property values constitute an integral part of the data required for comprehensive study of the reservoir and for optimal design of oil recovery and production schemes. Crucial decisions concerning planning and management of the reservoir have to be made on the basis of physical property values. These values are currently derived from empirical correlations, and the accuracy of the predictions depends on how closely the chemical composition of the fluid being tested approaches that of the fluids used. Crude oil systems from various oil-producing regions are used in the development of correlations These crude oils exhibit regional trends in chemical composition that categorize them as paraffinic, naphthenic, or aromatic. Because of the differences in composition, correlations developed from regional samples that are predominantly of one chemical base may not provide satisfactory results when applied to crude oils from other regions (Sutton and Farshad, 1990). This paper attempts to give comprehensive review of existing PVT correlations and models in the literature and the implications of applying these models to the Niger Delta crude
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