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This publication and the application described in it are furnished under license

exclusively to the licensee, for internal use only, and are subject to a confidentiality

agreement. They may be used only in accordance with the terms and conditions ofthat agreement.

All rights reserved. No part of this publication may be reproduced or transmitted in any

form or by any means, electronic, mechanical, or otherwise, including photocopying,

recording, or by any information storage/retrieval system, to any party other than the

licensee, without the written permission of Computer Modelling Group.

The information in this publication is believed to be accurate in all respects.However, Computer Modelling Group makes no warranty as to accuracy or

suitability, and does not assume responsibility for any consequences resulting from

the use thereof. The information contained herein is subject to change without notice.

Copyright !!1987-2009 Computer Modelling Group Ltd.All rights reserved.

The license management portion of this program is based on:


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types of chemical additive processes, using a wide range of grid and porosity mode

both field and laboratory scale.

This User's Guide details data entry for simulating the above processes. It require

some knowledge of reservoir engineering and some rudimentary exposure to

reservoir simulation. This User's Guide provides a step-by-step procedure forpreparation of input data for this program. A tutorial section is provided as well a

set of appendices.

Every attempt has been made in the preparation of this User's Guide to provide theuser with all the necessary details. If questions arise, please contact:

Computer Modelling Group Ltd.

#150, 3553 31 Street N.W.Calgary, Canada

T2L 2K7

Telephone: (403) 531-1300 Fax: (403) 289-8502 E-mail: [email protected]

Confidentiality: All components of CMG technology including software and relate

documentation are protected by copyright, trademark and secrecy. CMG technolog

can be used only as permitted by your license from CMG. By the license, you haveagreed to keep all CMG technology confidential and not disclose it to any third par

All rights reserved. No part of this publication may be reproduced or transmitted in

form or by any means, electronic, mechanical, or otherwise, including photocopyin

recording, or by any information storage/retrieval system, to any party other than th

licensee, without the written permission of Computer Modelling Group.

Corrections/Errors: CMG ENDEAVORS TO PRODUCE TECHNOLOGY OF THE

HIGHEST QUALITY; NEVERTHELESS ERRORS OR DEFICIENCIES IN SUCHTECHNOLOGY ARE INEVITABLE. IF YOU FIND AN ERROR OR DEFICIENCY, Y

ARE REQUESTED TO PROVIDE DETAILS OF IT AND ILLUSTRATIVE DATA SET

TO CMG SUFFICIENT TO PERMIT CMG TO REPRODUCE THE ERROR OR

DEFICIENCY. CMG SHALL ENDEAVOR TO REMEDY A DEFICIENCY IN A TIMEMANNER AND SHALL PERIODICALLY REPORT TO YOU AS TO THE STEPS BE

TAKEN TO REMEDY THE DEFICIENCY. THE RESPONSE TIME FOR A DEFICIEN

MUST BE PRIORITIZED FOR THEIR GENERAL APPLICATION TO CMG MEMBEAND WHETHER THEY FORM PART OF A CMG PROGRAM. CMG DOES NOT

WARRANT THAT DEFICIENCIES WILL BE REMEDIED.

Limited Liability: CMG does not warrant the accuracy or usefulness of the techno

and software - Refer to your license.


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Contents

1. Introduction

Overview....................................................................................................................Important Changes between STARS 2009.10 and 2008.10......................................

Data Incompatibilities with Previous Versions of STARS.......................................

New Keywords Added to STARS 2009.10...............................................................

Enhancements to Existing Keywords.......................................................................

New and Changed Template Data Sets.....................................................................

Introduction to STARS.............................................................................................

2. Tutorial

Introduction................................................................................................................

Data Groups in the Keyword Input System..............................................................

How to Read Keyword Syntax.................................................................................How to Document Your Data Set.............................................................................

How to Do a Restart..................................................................................................Controlling Contents of the Output Print File...........................................................

Controlling Contents of the Simulation Results File................................................

Describing Your Grid System...................................................................................

Specifying Null Blocks.............................................................................................

Describing Refined Grid...........................................................................................

Using Dual Porosity/Dual Permeability....................................................................


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User's Guide STARS Conte

Problems with Small Time Steps or Long Execution Times....................................Defining Wells..........................................................................................................

Defining the Well Type............................................................................................

How to Shut In a Well and Reopen It.......................................................................

Operating and Monitoring Constraints.....................................................................

Specifying Well Indices............................................................................................

Horizontal Wells.......................................................................................................

Stopping a Simulation Run.......................................................................................Guidelines for Setting Up Well Data........................................................................

Running Your Simulation.........................................................................................

Improving Numerical Performance..........................................................................

Optimizing Memory Requirements..........................................................................

Well Management and Group Control......................................................................

Parallel Processing....................................................................................................


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