SapGS04 - Installation and learning guide Saphir 4.00 KAPPA...

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Installation and learning guide Saphir Guided Session # 4• SapGS04-1 Saphir 4.00 © KAPPA Engineering 2005 Doc. V. 4.00.03 • 09-05 Saphir Guided Session # 4 A01 • Requirements It is assumed that you have already studied the guided sessions # 1 and # 2. The guided session # 1 already covered the initialization process and the loading of data. In this session we will repeat this to remind you of how to properly proceed. This session is also with a different reference fluid that requires you to go through more initialization dialogs, in particular of how to setup and build the PVT model for this gas test. You will require the rate and pressure files stored during installation in the Examples directory; SapGS04.pre and SapGS04.rat. B01 • Modified isochronal gas test This guided session covers a modified isochronal gas test of five rates and four buildups with approximate duration of 0.5 hours prior to the extended flowing period of 1 hour followed by a final build up of some 20 hours duration. B01.1 • Initialization Launch Saphir as stand alone or through the Ecrin workstation suite. Click on new and make sure you choose gas as the reference phase, standard analysis and default parameters. Set the reference date to 30 July 2001 at midnight. When you click on “Next” you will see that you are automatically taken to the PVT parameters dialog in order to define the gas properties necessary to construct pseudo pressures which is used for analytical gas test analysis by default. To define the gas properties and correlations click on , but leave the default parameters. Next will call up the dialog where you can define the pseudopressure range. Click create and proceed to load the pressure file. Make sure you choose the “Field format” with the first field as date (DD-MM-YYY) the second field as time of day and the third field as the pressure as illustrated in Fig B01.1 left. Pick up the flowrate file as free format as per Fig. B01.1 right. Fig B01.1 Load formatting
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Installation and learning guide Saphir Guided Session # 4• SapGS04-2 Saphir 4.00 © KAPPA Engineering 2005 Doc. V. 4.00.03 • 09-05 B01.2 • Analysis Proceed to extract the final buildup and run the automatic model. Adjust your match manually by click and drag in the loglog plot and run the automatic model again. Continue until the match is satisfactory. The late time data in the buildup appears to be affected by a boundary or some composite system. We will illustrate how to deal with this later. The Saphir screen should look like Fig B01.2. Fig B01.2 The results can be checked and browsed by a click on the icon. There appears to be no anomalies. Maximize the history plot and observe that although the simulated pressure matches very well the final buildup
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SapGS04 - Installation and learning guide Saphir 4.00 KAPPA...

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