Petroleum Experts GAP General Allocation Program USER GUIDE PDF

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Petroleum Experts GAP General Allocation Program Version 6.1 December 2005 USER GUIDE The information in this document is subject to change as major improvements and/or amendments to the program are generated. When necessary, Petroleum Experts will issue the proper documentation. The software descri...

Description

Petroleum Experts

GAP General Allocation Program Version 6.1

December 2005

USER GUIDE

The information in this document is subject to change as major improvements and/or amendments to the program are generated. When necessary, Petroleum Experts will issue the proper documentation. The software described in this manual is furnished under a licence agreement. The software may be used or copied only in accordance with the terms of the agreement. It is against the law to copy the software on any medium except as specifically allowed in the license agreement. No part of this documentation may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or information storage and retrieval systems for any purpose other than the purchaser's personal use, unless express written consent has been given by Petroleum Experts Limited. All names of companies, wells, persons or products contained in this documentation are part of a fictitious scenario or scenarios and are used solely to document the use of a Petroleum Experts product.

Address: Petroleum Experts Limited Spectrum House 2 Powderhall Road Edinburgh, Scotland EH7 4GB Tel: (44 131) 474 7030 Fax: (44 131) 474 7031 Email: [email protected] Internet: www.petroleumexperts.com

Registered Office: Petroleum Experts Limited Spectrum House 2 Powderhall Road Edinburgh, Scotland EH7 4GB

1

Introduction .................................................................................................................................. 1 1.1 What’s New ........................................................................................................................... 2 1.2 The Core GAP Technique ..................................................................................................... 3 1.2.1 About the Network Solver ................................................................................................. 3 1.2.2 About the Optimiser .......................................................................................................... 4 1.2.3 Considerations on Optimisation........................................................................................ 5 1.2.4 What is in this guide?...................................................................................................... 13 1.3 How to Use This Guide ....................................................................................................... 14 1.4 Symbols and Conventions .................................................................................................. 14 1.5 GAP Glossary of Terms ...................................................................................................... 15 2 Getting Started with GAP............................................................................................................. 1 2.1 The GAP User Interface ........................................................................................................ 1 2.1.1 The System Window......................................................................................................... 2 2.1.2 The Toolbar ...................................................................................................................... 4 2.1.3 The Navigator Window ..................................................................................................... 6 2.1.4 Opening a File .................................................................................................................. 8 2.1.5 Saving a File ..................................................................................................................... 9 2.1.6 The Preferences Dialog .................................................................................................... 9 2.1.7 Defining the Working Directory ....................................................................................... 11 2.1.8 Defining User Correlations.............................................................................................. 12 2.1.9 Edit Ini File ...................................................................................................................... 12 2.1.10 Printing from GAP ...................................................................................................... 12 2.1.11 Project Archiving ........................................................................................................ 13 2.1.12 Exiting GAP................................................................................................................ 15 2.2 The Options Menu............................................................................................................... 15 2.2.1 The Method Screen ........................................................................................................ 15 2.2.2 Injection Fluids................................................................................................................ 18 2.2.3 Tax Regimes................................................................................................................... 20 2.2.4 Emulsion Models ............................................................................................................ 20 2.2.5 Default Settings .............................................................................................................. 23 2.2.6 System Settings.............................................................................................................. 23 2.3 View Options ....................................................................................................................... 24 2.3.1 System Colours .............................................................................................................. 25 2.3.2 Icon Sizes ....................................................................................................................... 27 2.3.3 System Fonts.................................................................................................................. 27 2.3.4 Grid ................................................................................................................................. 27 2.4 The Edit Menu ..................................................................................................................... 28 2.4.1 Selected Wells… ............................................................................................................ 29 2.4.2 Finding Equipment on System Window .......................................................................... 29 2.4.3 Edit Equipment Controls (New!!!) ................................................................................... 31 2.4.4 Edit Project Paths ........................................................................................................... 32 2.4.5 Transfer Well Data from MBAL Models.......................................................................... 32 2.4.6 Initialise IPRs from Tank Simulations ............................................................................. 32 2.4.7 Execute OpenServer Statement ..................................................................................... 33 2.5 The Constraints Menu ......................................................................................................... 34 2.5.1 Defining the System Constraints .................................................................................... 34 2.5.2 Edit Constraints Table .................................................................................................... 35 3 Describing the PVT ...................................................................................................................... 1 3.1 Selecting the PVT method .................................................................................................... 2 3.2 Black Oil PVT.................................................................................................................... 4 3.1.1 Solve network mode ......................................................................................................... 4 3.1.2 Forecast mode.................................................................................................................. 5 3.3 Compositional Modelling ....................................................................................................... 5 3.3.1 EOS Model Setup ............................................................................................................. 6 3.3.2 Compositional Tracking .................................................................................................. 12 3.3.3 Fully Compositional fluid description .............................................................................. 15 4 Equipment Data - 1....................................................................................................................... 1 4.1 Equipment Data Entry Screen Format .................................................................................. 1 4.1.1 The Equipment List........................................................................................................... 2

4.1.2 Section Buttons................................................................................................................. 2 4.1.3 Action Buttons................................................................................................................... 4 4.1.4 Well Data Entry / Results.................................................................................................. 5 4.1.5 Well Summary Screen ...................................................................................................... 6 4.1.6 Well Input Screens.......................................................................................................... 10 4.1.7 Outflow Only Well ........................................................................................................... 49 4.1.8 Completing the Outflow Only Well – Inflow Performance Setup..................................... 60 4.1.9 Well Results Screen ....................................................................................................... 60 5 Equipment Data – 2 ...................................................................................................................... 1 5.1 Introduction ........................................................................................................................... 1 5.2 Separators (Production / Injection)........................................................................................ 2 5.2.1 Separator Summary Screen ............................................................................................. 3 5.2.2 Separator Input Screens................................................................................................... 4 5.2.3 Injection Source Details (INJECTION Man.Only) ............................................................. 7 5.3 Joints ..................................................................................................................................... 9 5.3.1 Joint Summary Screen ..................................................................................................... 9 5.3.2 Joint Input Screen........................................................................................................... 10 5.3.3 Joint Constraints ............................................................................................................. 10 5.4 Pipelines.............................................................................................................................. 12 5.4.1 Pipeline Summary Screen .............................................................................................. 13 5.4.2 GAP Internal Correlations............................................................................................... 14 5.4.3 Using Lift Curves for the Pipeline Pressure Drops ......................................................... 26 5.5 Tanks .................................................................................................................................. 54 5.5.1 Tank Summary Screen ................................................................................................... 56 5.5.2 Tank Input Data (Material Balance Tank) ....................................................................... 57 5.5.3 Tank Input Data (Decline Curve Tank) ........................................................................... 60 5.6 Pumps ................................................................................................................................. 63 5.6.1 Pump Summary Data ..................................................................................................... 64 5.6.2 Pump Input Data............................................................................................................. 65 5.6.3 Jet Pumps Option ........................................................................................................... 67 5.6.4 Pump Calculate Button ................................................................................................... 70 5.7 Compressors ....................................................................................................................... 72 5.7.1 Compressor Summary Data ........................................................................................... 73 5.7.2 Input Data for Compressor (Full Model) ......................................................................... 74 5.7.3 Input Data for Fixed dP Compressor .............................................................................. 76 5.7.4 Input Data for Power Compressor .................................................................................. 77 5.7.5 Compressor Control (Full Model Only) ........................................................................... 78 5.7.6 Compressor Schedule (ONLY for Prediction)................................................................. 78 5.7.7 Compressor Calculate Button......................................................................................... 79 5.8 Source / Sink ....................................................................................................................... 79 5.8.1 Source ............................................................................................................................ 80 5.8.2 Sink................................................................................................................................. 84 5.9 Inline Element ..................................................................................................................... 87 5.9.1 Inline Gate Valve ............................................................................................................ 88 5.9.2 Inline Check Valve .......................................................................................................... 89 5.9.3 Inline Separation............................................................................................................. 91 5.9.4 Inline Choke.................................................................................................................... 93 5.9.5 Inline Injection................................................................................................................. 95 5.9.6 Inline General ................................................................................................................. 98 5.10 Inflow Icon ......................................................................................................................... 111 5.10.1 Inflow Summary Screen ........................................................................................... 112 5.11 Grouping ........................................................................................................................... 112 5.12 Input Screen ...................................................................................................................... 114 5.12.1 Constraints ............................................................................................................... 114 6 VLP/IPR Generation ..................................................................................................................... 1 6.1 Introduction ........................................................................................................................... 1 6.2 A well model in GAP.............................................................................................................. 1 6.2.1 IPR.................................................................................................................................... 2 6.2.2 VLP ................................................................................................................................... 2

6.2.3 Information Relating to Outdated Performance Curves.................................................... 3 6.2.4 Importance of VLP Data Ranges ...................................................................................... 3 6.3 Generating Well and Pipe VLPs in a Batch Mode................................................................. 4 6.3.1 Batch Transfer of IPR’s..................................................................................................... 4 6.3.2 Batch Generation of VLPs ................................................................................................ 7 6.3.3 Batch Generate Pipe VLPs............................................................................................. 10 6.3.4 Generating Well VLP on a well-by-well basis ................................................................. 12 7 Model Validation........................................................................................................................... 1 7.1 Well Model Validation............................................................................................................ 1 7.2 Checking Wells Calibration ................................................................................................... 1 7.2.1 Running Production Validation / Quality Check ................................................................ 2 7.2.2 Checking the Quality of Individual Wells Graphically........................................................ 8 8. Network Solver and Optimiser .................................................................................................... 1 8.1 The Solver ............................................................................................................................. 1 8.2 The Optimiser........................................................................................................................ 1 8.3 Constraints and Equipment Control Screen .......................................................................... 1 8.3.1 Constraints........................................................................................................................ 1 8.3.2 Equipment Control Screen................................................................................................ 2 8.3.3 Optimisation Objective Function ....................................................................................... 5 8.4 Solving the Network (with and without Optimisation) ............................................................ 7 8.4.1 No Optimisation Mode ...................................................................................................... 9 8.4.2 Optimise and Honour Constraints Mode........................................................................... 9 8.5 Calculate Potential Option................................................................................................... 10 8.5.1 Optimise, No Constraints Mode...................................................................................... 10 8.5.2 Calculation Results ..........................................................................................