2.3 Completing the Installation
To complete the installation, do the following:
1. After clicking the Next button in the Setup Information window, the installation of the PLATO software starts. During the installation, a "Readme" file in HTML format opens (as shown in the example below). Read the information, and when done, close the "Readme" file.
An additional HTML file called "CrypKey" will open, explaining how to acquire a license (see the example below). Read the information, and when done, close the
"CrypKey" file.
2. Microsoft WORDTM will open. You will be prompted to enable macros and to install the Alice Macros. These macros must be installed in order to generate analysis reports.
3. Once the software installation is complete, click Finish and exit the wizard.
4. To complete the installation, reboot your computer.
3 Creating a Project
In this Chapter, a new PLATO project will be created. The project and the database path will be specified. The input files will be selected and the basic Well
parameters will be set.
The following procedure explains how to create a PLATO project.
1. Click the PLATO icon in the WINDOWSTM menu: Start-> All Programs-> PLATO.
The Create new PLATO project dialog opens, as shown below.
2. In the Project Name field, enter the name of the new project, e.g., "3PhaseProd ".
The prepared example project is a three-phase producer. Therefore,
"3PhaseProd" is an appropriate example name (Oil Water Gas).
3. Optionally, enter your name in the Analyst Name field.
4. Click Next to open the next dialog, as shown below.
Note The project name will be used as the project shortcut and default project folder name, as shown in the dialog..
In this dialog, you can change the project and database paths, the color coding and the unit system. However, in our example, there is no need to change anything.
5. Click Next to open the next dialog, as shown below.
6. Click the Add import files button to import ".LAS", ".LIS" or ".ASC" files of the related project.
From the pop-up dialog (see below), any drive, folder and import files can be selected. In this example you will select ".LAS" files in the Plato/Ex2Gow folder.
7. Select the first six ".LAS" files (Highlight the files and click Open). In this example, you do not select files with suffix "S#"( stationary data).
8. The 'Add Import Files' window re-appears. The list of all the files that will be imported can be viewed by clicking the down-arrow in the pull-down list.
9. Click Next to open the next dialog, which displays an overview of the project settings.
10. You can view the input logs, their names and units by clicking the View-> Edit curve attributes button.
11. Click Next to open the next dialog.
12. The service company is selected. Selection of the service is used to preset log names into the log aliases and preset tool characteristics. In this example the service company is "Baker atlas".
13. Click Next to open the next dialog, where a preselection of analysis types are available.
14.
Note The three icons on each row have been added for user convenience to indicate a Well location (land, desert and offshore).
15. In this example, you select Default PLATO, because you do not know yet which phases will occur. Click the first icon (Land) of this option.
Caution In a real-case analysis, make sure you select the correct type. If you select the wrong type, the analyzed results will be wrong.
16. Click Next to open the last dialog of the project creation procedure.
This last dialog displays a summary of the project settings. If required, you can change the settings by returning to previous dialogs.
17. Verify the information and click Finish to create the project.
This last step will create the log and parameter databases, and place them in the project folder. A project icon will be added as a shortcut, to re-open the project at any time.
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4 Analysis of the Data
The complete analysis consists of a set of six Subtasks. These Subtasks can be simple or complex, depending on the quality of the input data. The following is a brief description of each subtask.
Subtask 1: Reviewing the Input Data
In this Subtask, you inspect and sort the input data. You can remove logs if they are not recorded correctly. Make sure that all the available log data is displayed in the appropriate tracks.
Subtask 2: Preparing Data for Analysis
This Subtask is a preparation of the analysis to come. First you work with the fluid identification, pressure, and temperature logs. You select which logging runs will be put into the filtering process.
Subtask 3: Preparing the Spinner Data
In this Subtask, you use the spinner and line speed data to compute the apparent velocity (Vap) of the Wellbore fluid.
Subtask 4: Building the Flow Profile
This is the most important interactive phase! In this Subtask you build the flow profile, based on the logs and the perforation locations. The flow profile is built by dividing/zoning the Well into intervals which are producing, thieving, flowing, or merely static.
Subtask 5: Optimizing the Well Model
In this Subtask, you optimize the Well model by generating the downhole flow and production rates of each fluid phase. This is an iteration process with the computation, first done in coarse depth increments, and then refined to include all of the data available.
Subtask 6: Generating the Production Rates and Reports
In this Subtask, you convert the downhole flow and entry profile to surface conditions. These are the production rates, which are the most important results of the analysis. Finally, you can generate a report containing all the inputs and the results.
The following Sections are presented:
4.1 Subtask 1: Reviewing the Input Data ... 33 4.2 Subtask 2: Preparing Data for Analysis ... 36 4.3 Subtask 3: Preparing the Spinner Data ... 37 4.4 Subtask 4: Building the Flow Profile ... 39 4.5 Subtask 5: Optimizing the Well Model ... 42 4.6 Subtask 6: Generating the Production Rates and Reports ... 45