PVTsim for OLGA / LedaFlow

PVTsim for OLGA/LedaFlow is designed for the Flow Assurance engineer who uses OLGA or LedaFlow in pipeline studies and needs a good fluid description to take full advantage of the features in these two dynamic flow simulators.

To ensure a good description of water and hydrate inhibitors, the package offers Huron-Vidal and CPA as well as a dedicated water package for describing water bulk properties. The tabulated fluid properties can be presented visually using 2 and 3 dimensional plot features. The user can recombine a gas and liquid to a specified GOR and mix up to 100 fluids. The package further offers 3-phase aqueous PT flash and phase envelope simulation options. The hydrate formation conditions and the amount of inhibitor to prevent hydrate formation can be simulated using PVTsim’s Hydrate module, which is also part of the package.

Modules | PVTsim for OLGA/LedaFlow

BASE

The BASE module is the gateway to PVTsim’s diverse capabilities for simulating reservoir fluid phase behavior from reservoir to refinery. Compositional analyses and PVT data from a PVT report are easily entered into and stored in a PVTsim database.

Important features of the Base module include:

• Extensive pure component library
• Input of GC and TBP compositions
• Normal and heavy oil characterization
• CSP and LBC viscosity models
• Flexible component lumping and preset lumping schemes
• Recombination of separator oil & gas
• Mixing or weaving of up to 100 different fluids
• 2 phase flash and phase envelope simulations

PVTsim may be used with the industry standard SRK or PR equations (76 or 78 modifications) in their original form or volume corrected. The GERG-2008 ensures accurate results for natural gases. More complex heavy oil phase equilibria can be handled using PC-SAFT equation

FLASH

The flash option available in PVTsim for OLGA/LedaFlow is the 3-phase aqueous flash. For systems with water, a polar model (Huron-Vidal or CPA), can be used to give an accurate representation of the water concentration in the gas and oil phases and the amount of dissolved gas in the water phase. For systems without aqueous components, the flash calculations will typically be limited to two phases (gas and oil).

HYDRATE

PVTsim’s Hydrate module accurately simulates hydrate formation conditions of gas and oil mixtures carrying water. Depression of the hydrate formation temperature in the presence of salts and hydrate inhibitors (MeOH, EtOH, MEG, DEG, TEG) is simulated while accounting for the loss of inhibitor to the hydrocarbon phases. PVTsim automatically detects the stable hydrate structure (I, II or H) and the calculations are documented against experimental data in PVTsim’s hydrate verification reports.

The flash options (PT and PH) consider formation of hydrates (structures I, II and H) as well as gas, liquid and aqueous phases, solid salt phases, and ice. The minimum amount of a specified inhibitor to be added to prevent hydrate formation at a given pressure and temperature can be calculated with the Minimum Inhibitor option. The Hydrate PT curve option may be used to plot the hydrate curve in the relevant pressure range with or without inhibitor added.

Interfaces | PVTsim for OLGA/LedaFlow

OLGA & LEDAFLOW

– OLGA tab
– LedaFlow

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Understanding what each module can do will make it easier for you to choose the right package

Modules Specification

MODULES

INTERFACES

PVTsim for OLGA / LedaFlow

PVTsim for OLGA/LedaFlow is designed for the Flow Assurance engineer who uses OLGA or LedaFlow in pipeline studies and needs a good fluid description to take full advantage of the features in these two dynamic flow simulators.

Modules | PVTsim for OLGA/LedaFlow

Interfaces | PVTsim for OLGA/LedaFlow

Compare each module

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