ATHOS


Quick reference guide



Presentation of SIMView software

Working of SIMVIEW





Presentation of SIMView software :

SIMView is a sophisticated complete environment designed for achieving simulations of fluid flows in reservoirs.

work:

11 applications work together to realize SIMView.

Input data are integrated. Basically, they concern field geology, including thinknesses, porosities and permeabilities of the field material. Using the Reservoir Mesh Builder application, rectangular cartesian grids are set up. They can be refined until 10 times. A 2D and 3D visualization of the grid is possible. Its content can also be displayed by the Matrix Editor.

Then, flows can be simulated.

Output data will be mainly simulated production of oil, organized in items. They can be edited as tables. Production data can be displayed by the Table Editor and studied by the XY plot Viewer graphical tool. The last module offers the possibility of personalizing data representation (simple/composite plot style, colors, legends, etc)

Exchange of data between SIMView and other applications is accomplished via loaders:

ATHOS to SIMView brings ATHOS calculation results

Grid to SIMView brings grids data

Measures to SIMView is used to import oil production results.

ATHOS can be directly run from SIMView be using Run ATHOS.

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Working of SIMVIEW :

Organization of data:

Under each project, you can open several fields. Under a given field, there is a resevoir that can contain different studies. Each study often includes some cases.

Running SIMview:

Once you are in the diretory where SIMview is executable, type the comand simview.

A dialogue window appears: this is the SIMview Data Browser.

The Help button (top right) makes a link with Athos user guide. It actually opens and edits SIMview.pdf file, in the arbrocat reader.

By cilcking on Project, two buttons appear down: Open and Quit.

Quit is to close the data browser.

Img: Projet or help

When you open a project, a dialog box lists available databases. One at least is already selectable: demoDB. It is a prepogrammed database, which gives a variety of examples showing the kind of cases the software can treat.

Note:

Very interesting with ATHOS: a possiblity of contacting the code's support is offered. To access to this opportunity, simply click on the button hepl from the data browser window. keep the mouse pushed down. Then two options appear. Select contact our support and fill out the list.

Building your own case:

If you want to realize yor own simualtion, with its proper characteristics you can follow step by step the SIMView tutorial, which is deltailed on page 178 of the simview.pdf help file. A brief description is though given here.

Creating a field, importing layers characeteristcs. Grid To Simview module

First step : Hirachicly create a field, a reservoir, a study and a case. Once the last level exist, different tasks can be launched. Your field will be composed by 5 layers.

Second step : Import data files containing tutorial information about the field.

Import file

For each layer, you will need: gross thikniss (GT.ascii), porosities (POROS*.ascii), horizontal permeabilities (KX*.ascii). For the top layer (number 5) you will also have to get depth values(TOP.ascii). These files are contained in the directory examples, under the sub directory Grid To SIMVEW. Examples should be located in your working account.At this same step, you will intialize x-axis and y-axis dimensions. Make the initialization following instructions.

Initialization of layers geological properties:

You are requested to name your geometry file. You must also give a grid name a relatively to your reservoir. You Previously imported different data files to the field. Here, you will assign values of data (gross thiknesses, horizontal permeablilities, and porosities) to the matching layer. Lastly, you can use the matrix editor module to affect vertical to horizontal permeability ratio(called: "Z to H cell permeability"), trap zonation, rock end points zonation, and net thikness (same names). Here again, stricltly respect values provided by simview tutorial. When these intializations are all done, the root grid contains with all the parameters it needs to launch simulations via ATHOS.

Basic grids:

First of all, create a grid. You can also chek if the diplays of DX and DY are correct (12000ft*12000ft). If not, destroy all the study you are working on, and make intializations once again. Operations are completely irreversible in Simview: each time, you have to check that imported datat is correctly done before confirming operations and quitting dialog windows.

Once you have finished with the subgrids, the grid system is done. You can edit the grids to vizualise what imported, this will look like the picture below:

Result

To simulate, you will simply have to run ATHOS, via RUN ATHOS command. Different types of simulation resulats are available.

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