A Comparative Study of Bubble Point Correlations of Sudanese Oil

Abstract

The reservoir fluid properties is the key of oil reserve evaluation and production even using primary production or enhanced oil recovery methods. So we preferred to focus on some of the properties of crude oil that reflect the oil behavior under the pressure and temperature of the reservoir. The objective of this research to know the properties of a Sudanese oil from new field and the type of it’s fluid. And choose the best bubble point correlation which gives a reliable result compeered with the measured one from five correlations. An experimental Study has been done for a Sudanese crude oil field recently discovered. From the study we get the result of the following properties bubble point pressure, relative volume, oil compressibility, gas oil ratio or solubility, viscosity, density, Z coefficient of gases liberated, oil and gas formation volumes factors, the specific gravity of gas, molecular weight of gas, and oil and gas compositions. According to these properties we describe this type of oil as black oil. Finally we find that Standing correlation is the best computational methods to predict the bubble point pressure from the five methods, using data from various Sudanese oil fields (93) sample and analyze the results statistically based on the standard deviation and the percentage of errors and pressure difference for samples measured in the laboratory.