Objective
- To calculate the asphaltene phase envelope, effect of gas injections and PVT properties from the modeling approaches, developed at CERE, using the CPA and PC-SAFT (with association term).
Required Experimental Data
- Reservoir fluid composition up to C6+ fraction.
- Two upper onset pressure at two different temperatures. However, we recommend at least three data points for better accuracy of results.
- Specific gravity and molecular weight of stock tank oil/C6+ fraction.
- Asphaltene (wt. %) in the stock tank oil (Optional input) (important when user is interested in absolute value of amount of asphaltene precipitation during the depressurization).
Output
- Calculation of Asphaltene Phase Envelope (Upper/Lower asphaltene precipitation onset pressure-temperature boundaries).
- Calculation of effect of gas injection on Asphaltene Phase Envelope.
- Calculation of asphaltene amount in the oil phase and precipitated asphaltene amount during depressurization of reservoir fluid at constant temperature.
- Calculation of PVT properties at constant temperature (Differential Vaporization Test: GOR, gas/liquid volume formation factors, gas specific gravity, compressibility factor of gas, compressibility, relative volume, density) (Constant Mass Composition Test: oil phase density, total density (combined density of all phases, relative volume (reference to saturation volume), compressibility)
Required Software
