Manual GRAF.







GRAF is the post-processing package for the ECLIPSE simulator. It provides facilities for displaying simulation results and user data in graphical form. Various types of plots are available, including line graphs, colour-filled grid solution displays, contour displays, arrow diagrams, transmissibility displays and vertical equilibrium displays.

GRAF may be used interactively, via menus, or driven by high level commands in a graphics run file. High quality graphics for reports can be produced on a wide range of plotters.

GRAF uses tow related data structures: the data workspace, which contains all data to be plotted, and the picture workspace, which contains all the graphical display parameters. The data workspace contains:

1. Vector, including data which are loaded from summary files user data files and contain values at each time step.

2. Field data, which are loaded from grid files and define the geometry of a field as a set of grid cell corner points.

3. Solutions, which are loaded from initial or restart files and consist of grid cell property values such as PERMX and simulation results such as grid cell PRESSURE at each time step.

4. Table data, which consist of well VFP tables.



Depending on the computer system in use, GRAF may be started via an operating system command (followed by pre-menu to select the mode of use) or via an automatic program launcher or start-up macro (which can start he program with pre-defined defaults for interactive graphics).

To use the package directory from the operating system, type the start-up command, e.g. @graf in the work station. A pre-menu will now be displayed offering a choice of modes of using the program:



Option 1 can be used from non-graphical terminals to perform file handling operations and to display pictures to another device as a plotter.

Option 2 is used from graphical terminals and allows pictures to be viewed on the screen during an interactive session.

Option 3 is used to produce a tabulated output of summary data, as produced by the Runspec keyword in ECLIPSE.

Option 4 executes GRF directly without prompting for actions from menus. If graphical output is required, the relevant GRF commands will be needed (e.g. SET GLOBAL, DISPLAY etc).

Option 5 gives the last data of change for the various software annexes used in GRAF. It also shows the maximum workspace dimensions available when the program is started.



The primary menu is the highest menu in GRAF:



The main options are:

Choice 1: Read ECLIPSE or user data:

Files from one or more simulation studies can be loaded into the GRAF data workspace. User data files can also be read via this option.

Choice 2: Print or index loaded information:

This option provides an index of the contents of the data workspace and picture workspace currently loaded in GRAF. Formatted tables of vector data and solution data can be written to output files for printing.

Choice 3: Create a picture:

After reading in data, pictures can be created using this option. One or more line graphs or grid displays can be constructed within a single picture.

For more information.

Choice 4: Modify a picture:

The default picture setup may need to be modified to produce presentation quality output. This option gives access to a number of menus to change axes, add captions, move viewport positions, change colour fill displays etc.

Choice 5: Display a picture:

This option allows a sequence of pictures to be viewed interactively or plotted on a hard copy device.

Choice 6: Load or save workspace:

Workspace can be saved as unformatted files, to stare data and pictures for a later GRAF session, or as a formatted files for transfer between machines. This option also allows data to be written out as user data files.

Choice 7: Copy one picture to another:

This option allows the layout, axes, captions and lines in one picture to be copied (or partially copied) to another picture.

Choice 8: Write or execute graphics run file:

This option allows a GRF to be created from the current GRAF session or an existing GRF can be executed.

Choice 9: Modify Granite settings:

This option allows global properties such as line styles, text fonts and colour attributes to be modified by the user.

Choice 10: End session

Choice 11: Additional facilities:

Additional facilities in GRAF include derived quantities calculations for vectors and solution data, box limits options for displaying a subset of a grid, and volumetric calculations.


IV. Examples of results.

 pressure in function of depth at t=0 for x=1 and y=1.


pressure in each point at t=0.

 Oil saturation in function of depth at t=0, 2, 5, 8, 11 for x=5 and y=1.