PVTsim Tutorial: How to generate a complete PVT study

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PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

Hello,,

Here will start a new Tutorial on How to Generate a complete PVT set (study) using PVTsim software.

This software is the most advanced PVT modeling in the market. And it is compatible with all fluid flow/assurance software.

Now lets start.

In Attachment you will find the real data full stream (well fluid) composition provided with a professional member in FANARCO.

Please download it and save in any folder in your PC.
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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

Open PVTsim (My version is 21 so the features may be different from other versions little bit).

From the File menu choose (Create New Database), then save the database wherever you want....

From Fluid menu choose (Enter new fluid). A new window will displayed


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Re: PVTsim Tutorial: How to generate a complete PVT study

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We Notice that H2S is included in the PVTsim table and the list is up to C20 only.

So, we need to add more components to the list and to assign H2S to zero since we don't have H2S in the real data.

Click Add Comps Button to add more Components to the database list.

A new window will appear, select C21 from the list then OK.

Repeat this step manually to reach C27


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Re: PVTsim Tutorial: How to generate a complete PVT study

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Notice that C27 in the real data (Excel sheet) is C27P (plus).

So, in PVTsim double click on C27 and name it C27P and OK.



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Re: PVTsim Tutorial: How to generate a complete PVT study

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Modify the properties of C27P in the database as in the screen shot below to be in consistent with the real data.

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Re: PVTsim Tutorial: How to generate a complete PVT study

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In the "Fluid" field name the fluid to identify it later on.

I named it PVT_F

Then Click OK.


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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

Now you created the database and stored the fluid composition.

For our case we should build a new Unit system (the common unites in PVT).

In "Options" menu choose "Unit System and Settings" and choose these units as below and name it whatever

I named it "FANARCO".

Click OK.


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Re: PVTsim Tutorial: How to generate a complete PVT study

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Now we need to identify this fluid in the reservoir conditions;

In order to create the Phase envelop Go to Simulations Explorer and double click on Phase Envelope as below .



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Re: PVTsim Tutorial: How to generate a complete PVT study

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In the newly opened window leave the defaults as it is except the mole fractions values, you can enter any values between 0 to 1.00

For me i assigned the values in this pic then click OK.


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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

From the Phase Envelope chart displayed and by locating the reservoir conditions (Pressure = 2450 Psi & Temp = 218 F) looks this reservoir is Under Saturated fluid (Initially)..


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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by dolatitv »

Good post,Thanks dear FANARCO

How to generate a Export a model for E300 simulation?
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Re: PVTsim Tutorial: How to generate a complete PVT study

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dolatitv wrote:Good post,Thanks dear FANARCO

How to generate a Export a model for E300 simulation?
We didnt finish the model yet,

We just created the Phase Envelope (is this valid)..

Today, will continue for PVT creation...

Just follow
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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

There are three Tests for PVT included in PVTsim:

- Constant Mass Expansion:

The reservoir fluid is kept in a cell at reservoir conditions. The pressure is reduced in steps at constant temperature and the change in volume is measured. The saturation point volume, Vsat, is used as a reference value and the volumetric results presented are relative volumes, i.e., the volumes divided by Vsat.


- Constant Volume Depletion:

This experiment is performed for gas condensates and volatile oils.
The reservoir fluid is kept in a cell at reservoir temperature and saturation point pressure. The pressure is reduced in steps, and at each level as much gas is removed that the volume of the remaining gas and oil mixture equals the saturation point volume.


- Differential Depletion

This experiment is only carried out for oil mixtures. The reservoir fluid is kept in a cell at the reservoir temperature. The experiment is usually started at the saturation pressure. The pressure is reduced stepwise and all the liberated gas is displaced and flashed to standard conditions. This procedure is repeated 6-10 times. The end point is measured at standard conditions.


In Our study we will run Differential Depletion DD
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Re: PVTsim Tutorial: How to generate a complete PVT study

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Under Simulation / PVT Simulations; Double click on Diff Depletion.

Enter the required pressure steps as below and click OK.

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Re: PVTsim Tutorial: How to generate a complete PVT study

Post by FANARCO »

Now you have a complete PVT set and you can use it for any Petroleum/Reservoir Engineering.

Copy the cell and paste into excel......



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