Services - Reservoir Engineering

PVT - Fluid Properties Calculations

As is well known, laboratory experiments are the most reliable way to calculate fluid properties.  However in their absence many correlations are available to approximate the PVT characteristics of a reservoir fluid quickly and reasonably accurately.  Where a great deal of accuracy is not required, these equations can save a petroleum company the cost and effort of a detailed PVT study.

CalScan engineers calculate Fluid Properties using custom developed Excel Spread sheets based on standard industry correlations and engineering equations. Oil and Gas Fluid properties can be calculated based on compositional analysis or bulk fluid density depending on the data available.

Following Fluid Properties can be estimated;

• Oil density, viscosity, compressibility and volume factors as functions of pressure, temperature, and composition.
• Gas Z-factor, density, volume factor, and viscosity as functions of pressure, temperature, composition or gas gravity.
• Bubble and Dew Point pressures as functions of temperature and composition.
• Solution Gas-oil ratio at, above or below the bubble point.
• Pseudo-critical and Pseudo-reduced temperature and pressure (gases only).
• Static wellhead pressure as a function of composition or gas gravity, well depth, bottom hole conditions, and surface conditions.

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