5_wet gas solution

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KOG KL Wet Gas Update June 2013Steve Krupa

June 2013


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Contents

1.Current Wet Gas Solution

2.Equation of State3.New options available


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Contents




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Wet Gas Metering by KROHNE Oil & Gas

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Virtual Flow Computer

Classical Venturi Tube

ISO 5167 standard

De Leeuw Over Reading Correction

Multi-Flash PVT calculation Tracer Dilution (option)

Wet Gas Sampling (option)


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Wet Gas Metering by KROHNE Oil & Gas

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KROHNE Oil and Gas provide Wet Gas Solutions

PC Based Virtual Flow Computer for wet gas flow computation

High Quality Classical Venturi Tube produced by Seiko

The VFC is very easy to integrate with PVT Flash calculation

software from INFOCHEM (proprietary software under licence)

The VFC is ideal for multi-stream applications

VFC

FC90

Flow

calculations

OPC P C


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Base ISO 5167 components

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DPT

P

Complete Wet Gas Venturi System

DP

~150 x Pipe Diameters

TRACER

COLLECTION

POINT

TRACER

INJECTION

POINT

Composition

Temperature

DP

PressureMass Flow

GVF


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Calculation Flow Chart

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GVF from Equation of State
http://c/windows/system32/Presentation%20Contents/0-SY-0040-002%20(VFC%20Application%20Architecture).vsdhttp://c/windows/system32/Presentation%20Contents/0-SY-0040-002%20(VFC%20Application%20Architecture).vsd


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ISO 5167 Part 4 : 2003, Venturi for base mass flow

De Leeuw correction for over reading

Manual Composition update (large data base ofcomponents available)

Sophisticated Equation of State combined with live P&T

EOS determines division of liquid and gas components

Gas uses ISO 6976 for base density

Liquid uses API for determination of base density


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Typical Wet Gas Architecture Centralised VFC


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Typical Wet Gas Architecture Multiple Wells


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Wet Gas Performance Expectation

Summary from NEL reference

GVF Gas Liquid

98% and above 4% 20%

95% to 98% 6% 10%

95% and belowMay not be suitable for

venturi wet gas meterMay not be suitable for

venturi wet gas meter


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Contents




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GVF from Equation of State
http://c/windows/system32/Presentation%20Contents/0-SY-0040-002%20(VFC%20Application%20Architecture).vsdhttp://c/windows/system32/Presentation%20Contents/0-SY-0040-002%20(VFC%20Application%20Architecture).vsd


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GVF determination using Equation of State (EOS)

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GVF determination using Equation of State (EOS)

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GVF determination using EOS with over 250 components

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GVF determination using EOS with over 250 components

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GVF determination using EOS typical data


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Contents


2.Equation of State

3.New options available


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Contents

New Options now available

1.6D venturi - KROHNE brand

2.3D visualisation of GVF etc

3.New ISO/TR equations


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New Venturi from KROHNE with 6D

New Options Item 1

Venturi with 6D tapping


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New Options Item 2

3D Visualisation of P loss ratio, Lockhart Martinelli(Wetness or GVF) and Froude No.

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New Options Item 2 3D Visualisation

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New Options Item 3

ISO/TR Draft Equations

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New ISO/TR Draft Equations

Standard still in draft format

Background work carried out by NEL UK

Initial resistance from de Leeuw and Richard Steven withpaper at NEL Conference

NEL responded to criticism with paper at recent

Conference

Future status of standard - unknown However our end users still interested in difference in

final flow values when compared to previous method

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New ISO/TR Draft Equations

Equations use X (Lockhart Martinelli) and H (surface

tension factor) H is constant

Also pressure loss ratio used in the equations

Pressure loss ratio available if 6D downstream tapping

used on venturi

Krohne system can calculate and compare using both

sets of equations

EOS allows us to calculate many fluid properties from

composition (including GVF/Lockhart Martinelli)

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Thank you for your attention!

5_wet gas solution

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