Development of New Empirical Correlation forPrediction of Oil Formation Volume Factor of CrudeOil for a Major Part of Oil Fields of Upper AssamBasin

摘要

Empirical correlations for the prediction of reservoir fluid properties play a significant role in reservoir technology for calculating recovery efficiency and also for predicting future performance of the reservoir. Reservoir fluid properties form the basis of many petroleum engineering calculations. The evaluation of oil and gas reserves, fluid flow through porous media, multiphase flow in pipe, surface and sub-surface equipment design, and production system optimization all depend heavily on reservoir fluid properties. This paper presents a new empirical correlation to predict oil FVF of crude oils for a part of oil fields of Upper Assam basin based on available PVT data.For the present study Shammasi's (2001) correlation has been taken as reference. The best suited oil formation value factor correlation as a function of solution gas-oil ratio, stock tank oil relative density and reservoir temperature was newly developed with the help of multivariate non-linear regression technique. To check the degree of accuracy as well as performance of the newly developed correlation, error analysis are done. The results show that the developed model is better than the reference one having an absolute average relative percent error of 6.88% and average relative % error of-0.86% respectively.