05_Black oil properties_reservoir fluid studies

# 05_Black oil properties_reservoir fluid studies - Black-Oil...

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Black-Oil Properties – Reservoir Fluid Studies 1 Black-Oil Properties – Reservoir Fluid Studies Instructional Objectives: - List the different laboratory procedures that make up a complete black-oil laboratory fluid study. - Describe the laboratory procedure known as pressure-volume relations, list other names for this procedure, discuss how to identify the data from this procedure if the words accompanying the data are unreadable, and list the uses of the resulting data. - Describe the laboratory procedure known as differential liberation, discuss how to identify the data from this procedure if the words accompany the data are unreadable, and list the uses of the resulting data. - Describe the laboratory procedure known as a separator test and list the uses of the resulting data. - List the data from a black-oil laboratory fluid study that can be used directly in engineering calculations. - List the laboratory procedures from which data are used to calculate oil formation volume factors and solution gas/oil ratios at pressures above bubble point pressure. - List the laboratory procedures from which data is used to calculate oil formation volume factors and solution gas/oil ratios at pressures below bubble point pressure. - Explain optimum separator conditions and show how to determine them. - Write the equations for calculating oil formation volume factors above and below bubble point pressure. - Write the equations for calculating solution gas/oil ratio above and below bubble point pressure. - Write the equation for calculating the coefficient of isothermal compressibility of oil at pressures above bubble-point pressure from laboratory data. - Write the equation for calculating the oil density at pressures above bubble point pressure from laboratory data. Introduction: The following physical properties can be determined from the results of a black-oil reservoir fluid study: - Bubble point pressure, and, - Formation volume factor of oil, - Solution gas-oil ratio, - Oil density, - Coefficient of isothermal compressibility of oil, - Oil viscosity as functions of pressure as pressure decreases from initial reservoir pressure through the bubble point to very low pressure. Also determined from the study are: - z-Factor, - Formation volume factor, calculated from z-factor, - Specific gravity, - Viscosity of the gas evolved in the reservoir at pressures below the bubble point.

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Black-Oil Properties – Reservoir Fluid Studies 2 Which fluid properties can be used directly from laboratory report? - Bubblepoint pressure - Oil density - Oil viscosity - All gas properties Which fluid properties must be calculated from data in laboratory report? - Oil formation volume factor, B o - Solution gas-oil ratio, R s - Coefficient of isothermal compressibility of oil, c o Why? Above the bubble point the data are reported as:
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05_Black oil properties_reservoir fluid studies - Black-Oil...

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