olga 7-notes

_RELEASE NOTES

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VERSION 7.0

OLGA 7.0 Release Notes Page 1

10 June 2011

TABLE OF CONTENTS: OLGA 7.0 Release Notes

Page

1. INTRODUCTION 2

2. GRAPHICAL USER INTERFACE 3 2.1 New look and feel 3 2.2 The diagram view 3 2.3 3D visualization 4 2.4 Custom dialog 4 2.5 General 4

3. OLGA HD 5

4. USER DEFINED DISPERSIONS AND PLUG-IN MODULE 5

5. PROCESS EQUIPMENT 7 5.1 Extended functionality for transmitter 7 5.2 Pumps 7

5.2.1 Framo pump 7 5.2.2 Pressure boost 7

5.3 Extended choke model with new features 7 5.4 Centrifugal pump curve 8

6. TEMPERATURE DEPENDENT MATERIAL PROPERTIES 8

7. MINOR CHANGES AND BUG FIXES FOR OLGA 7.0 8 7.1 Possibility to control node input 8 7.2 Simplified pump with no rated pump density 8 7.3 Accuracy in unit conversion 8 7.4 Measured value in PSV controller fixed 8 7.5 Problem with leak in restart simulation fixed 8 7.6 Flash calculation for drilling corrected 8 7.7 Output variables SLAL and SLAI 9 7.8 Crossover functionality not available in OLGA 7.0 9

8. INSTALLATION 9 8.1 Installation requirements 9 8.2 Sample Cases 9


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1. INTRODUCTION

These notes accompany the release of OLGA 7.0 from SPT Group. The notes describe changes in OLGA 7.0 relative to OLGA 6.3.2, and should be read by all users of the program. The complete program documentation consists of the OLGA Help, Installation Guide and these Release Notes. In addition, module specific User Guides are available. OLGA 7.0 comes with a new graphical user interface (GUI) which provides new look and feel features, a new diagram view and 3D visualization. Further, two new modules are available in OLGA 7.0. The OLGA HD Stratified Flow Model is a simplified 3D model for a three phase stratified pipe flow, and the Plug-In module is a framework for interfacing user defined models. The program is available on PCs with Microsoft Windows operating systems (Windows XP, Windows Vista and Windows 7). Several versions of OLGA may be installed in parallel. The customer center provides useful information about frequently asked questions and known issues. The customer center is accessible from www.sptgroup.com. Please contact SPT Group if problems or missing functionality are encountered when using OLGA or any of the related tools included in the OLGA software package. E-mail: [email protected] Telephone: +47 6389 0400 Fax: +47 6484 4500 Address: SPT Group AS, P.O. Box 113, N-2027 Kjeller


10 June 2011

2. GRAPHICAL USER INTERFACE

2.1 New look and feel

Main menu changed to a File menu tab with some extended functionality

OLGA is started with New in focus

Visualization of the templates in New

Improved organization of case and project functionality

Case tool bar

Separate plot tabs

Option for multiple plots in one plot tab

2.2 The diagram view

Drag and drop functionality

Case overview with pan and zoom

Live updates of results

Improved graphical configuration of flowpaths, nodes and separators

Improved graphical configuration of controllers

Multi-selection of objects for the following operations: delete or move


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2.3 3D visualization

Gas/liquid holdup for one flowpath in a separate plot tab

Slug shown in red

Rotate, move and reset

2.4 Custom dialog

A new custom dialog for Centrifugal Pump curves

2.5 General

Faster opening of large cases

More manageable to open many cases and large projects

Remote desktop works without any limitations


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3. OLGA HD

The OLGA HD module features the OLGA HD stratified flow model. This flow model is based on developments in the HORIZON II project and covers stratified and large wave flow regimes. The model is developed to provide more consistent, scalable and accurate predictions of pressure drop and holdup for systems dominated by these flow regimes. OLGA HD applies a parameterized 2D velocity distribution to obtain frictions and velocity shape factors in the cross section. Combining the 2D velocity distribution with the 1D conservation equations yields a 3D representation of a slowly evolving flow. The model handles 1-3 layers, and uses a generic layer model. This model is used for all three layers. Coupling the layers yields a full three-phase model comprising a 3D flow description at 1D evaluation speed. Limitations The OLGA Slug Tracking Module applies the standard flow model for stratified flow in the numerical segments containing slug fronts or slug tails. The OLGA HD stratified flow model is not compatible with the Complex Fluid module(FLUID TYPE = COMPLEXFLUID).

4. USER DEFINED DISPERSIONS AND PLUG-IN MODULE

This module is designed as a flexible flow assurance framework for tracking user defined dispersions and utilizing external physical models provided by the user through a DLL.

FA model experts and programmers

generate plug-in DLL


10 June 2011

The user may through the input define new User Defined dispersed phases (UD phases) inside each layer and phase in the OLGA model, as depicted above. Physical models can then be provided in a user made DLL for

Mass transfer between phases (e.g. a hydrate formation model)

Mass transfer between layers (e.g. sand deposition to a bed or wax deposition to a wall layer)

Modifications of apparent viscosity due to the presence of the dispersion

Slip velocity between dispersed phases and carrier/continuous phase

PVT properties of the new phase and optionally modification of the gas/oil/water properties

Modifications of the heat transfer coefficient between the fluid and the pipe wall

Compositional calculations


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The details around the DLL interfaces and physical modeling are described in a separate document, OLGA Plug-in User Model, Numerics and Programmers guide. The input is described in the OLGA User Manual.

5. PROCESS EQUIPMENT

5.1 Extended functionality for transmitter

A new key, VARIABLE, has been added to the transmitter keyword. This key defines the variable that will be transmitted from the object where the transmitter is located. By default the variable will be in SI units. However, the unit can be specified in the selection dialogue for the variable. The transmitter can only have one variable. However, the out signal from the transmitter can have several connections. All out signals need to go from a transmitter, the only exception is the controllers.

5.2 Pumps

In OLGA 7 the previous PUMP keyword is divided into keywords for each type of pump. The new keywords are; SIMPLIFIEDPUMP, PUMPBATTERY, DISPLACEMENTPUMP and CENTRIFUGALPUMP. In addition two new pump models are available.

5.2.1 Framo pump

A new pump type, FRAMOPUMP, is available. The pump model is developed by Framo Engineering AS, and a library of their most common pump configurations is available in OLGA. (OLGA-06044)

5.2.2 Pressure boost

A new simple pump is available. The pressure boost pump should be used to model a pressure increase during design, before an actual pump is chosen. The pump gives a specified pressure increase independent of flow, fluid properties etc. (OLGA-06899)

5.3 Extended choke model with new features

EQUILIBRIUMMODEL (former CRITFLOWMODEL) is extended with a new option EQUILIBRIUM, allowing for HEM simulations. Further, it is possible to enable and disable the recovery in the valve (RECOVERY) and to tune the recovery model by a factor CR, where 1 gives maximum recovery and 0 give no recovery. For the HYDROVALVE model two new options are available. First, a slip model, CHISHOLM, can be selected, and further, thermal equilibrium between gas and liquid can be assumed by setting THERMALPHASEEQ to YES. (OLGA-06628)


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5.4 Centrifugal pump curve

A new keyword, CENTPUMPCURVE, has been introduced in order to enter pump curves in the traditional head-flow and efficiency/power/torque-flow curves. For two phase pump curves it is possible to enter one set of curves for each GVF.

6. TEMPERATURE DEPENDENT MATERIAL PROPERTIES

The temperature calculations in OLGA have been extended to incorporate a general, temperature dependent MATERIAL. The keys CONDUCTIVITY, CAPACITY and DENSITY can now be given as a vector of values, where each entry must correspond to an entry in a vector of temperatures given in the new key TEMPERATURE. Between two points in the vector, the conductivity will be linearly interpolated, whereas for the heat capacity and the density, the product of the two will be interpolated. No extrapolation is performed. (OLGA-08950)

7. MINOR CHANGES AND BUG FIXES FOR OLGA 7.0

7.1 Possibility to control node input

The node handles input signals from controllers. Massflow and pressure are the available input parameters that can be controlled. (OLGA-07029)

7.2 Simplified pump with no rated pump density

If the key DENSITYR is set equal to zero for a simplified pump, the effect of rated density on the pressure increase is neglected. (OLGA-07545)

7.3 Accuracy in unit conversion

The accuracy in the unit conversion in OLGA is improved by accounting for more significant numbers. (OLGA-09105)

7.4 Measured value in PSV controller fixed

The initial measured value in a PSV controller was calculated wrongly during steady state. This has been fixed. (OLGA-09561)

7.5 Problem with leak in restart simulation fixed

There was a problem with initialization of leak in a restart simulation. This could cause the simulation to crash. (OLGA-09200)

7.6 Flash calculation for drilling corrected

In OLGA 6.3 there was an error in the local flash term for the pressure equation when using the drilling option. For some shut-in cases this error could cause very high pressure values. (OLGA-09225)


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7.7 Output variables SLAL and SLAI

The output variables SLAL and SLAI are linearized coefficients for the friction. These are used in momentum calculations in OLGA 5 and are not relevant in OLGA 7. These output variables should therefore not be used or compared with results from OLGA 5.

7.8 Crossover functionality not available in OLGA 7.0

The crossover functionality available for Lines is not available in OLGA 7.0. This means that functionality for coupling lines in a bundle case is limited compared to OLGA 6.

8. INSTALLATION

8.1 Installation requirements

OLGA 7 requires installation of .NET Framework 3.5 SP1. This is included in the installation and will be installed automatically if missing on the target computer. (OLGA-09578)

8.2 Sample Cases

The sample cases are available from the Help page, accessed from the File menu. Drag and drop the sample cases in order to open them in the OLGA GUI. The case files are located on the Public Documents folder (C:\Users\Public Documents).