[File Name or Event]Emerson Confidential27-Jun-01, Slide 1

Custody Transfer (Energy) Custody Transfer (Energy) Custody Transfer (Energy) z Since the early 80s it has become common for

companies to buy and sell energy (Dekatherm, MMBTU).

z AGA 5 / ISO 6976Energy = Corrected Volume (From FC) X Heating Value (From GC)

z AGA 8 Supercompressibility MethodsUsed to calculate the Corrected Volume

Gross 1: SG, BTU, CO2 (From GC)Gross 2: SG, N2, CO2 (From GC)Detail Method: Uses compositional breakdown of the Gas (From GC)

[File Name or Event]Emerson Confidential27-Jun-01, Slide 2

ApplicationApplicationApplication

z Gas Orifice

z Gas Turbine

z Gas Ultrasonic

Gas Liquid Provingz PD/Turbine

z Coriolis

z Ultrasonic

z Orifice

z Bi-directional

z Uni-directional

z Compact

z Master Meter

[File Name or Event]Emerson Confidential27-Jun-01, Slide 3

Gas Orifice ApplicationGas Orifice ApplicationGas Orifice Application

MPD

PD

PD

P

D T

VALVE POSITION

VALVE COMMAND (X2)

SYSTEM ALARM

PROCESS ALARM

COMPUTER ALARM

MASS TOTAL

SVOL TOTAL

RTD OR4-20mA

PULSES OR4-20mA

4-20mA

4-20mA

4-20mA

4-20mA

4-20mA

4-20mA

MASS FLOWRATE

SVOL FLOWRATE

ENERGY FLOWRATE4-20mA

RS232

MODBUS RS232ALARM/EVENT PRINTER

METERING STATION COMM.

SUPERVISORY (DCS)

[File Name or Event]Emerson Confidential27-Jun-01, Slide 4

Gas Turbine ApplicationGas Turbine ApplicationGas Turbine Application

[File Name or Event]Emerson Confidential27-Jun-01, Slide 5

Liquid Coriolis ApplicationLiquid Coriolis ApplicationLiquid Coriolis Application

[File Name or Event]Emerson Confidential27-Jun-01, Slide 6

Compact Prover ApplicationCompact Prover ApplicationCompact Prover Application

[File Name or Event]Emerson Confidential27-Jun-01, Slide 7

Software LayoutSoftware LayoutSoftware Layout

[File Name or Event]Emerson Confidential27-Jun-01, Slide 8

Calculation Flowchart (MFC)Calculation Flowchart (MFC)Calculation Flowchart (MFC)

Pulse input from USM Gross Volume Fr

Temperature

Pressure

Common Header FC

C6+ & H2O

ISO 6976/AGA 8

Std Density

Compressibility

Line DensityStd Volume Fr

Energy Fr

Mass Volume FrField Inputs

Heating Value

[File Name or Event]Emerson Confidential27-Jun-01, Slide 9

Calculation Flowchart (CHC)Calculation Flowchart (CHC)Calculation Flowchart (CHC)

MFC 11-X-2A

MFC 11-X-2B

C6+ Composition

H2O Component

C6+ & H2O

Station Totals

Station Flowrate

Supervisory Computer

Std Density

Meter Run FC

Inland Gas

Heating Value

[File Name or Event]Emerson Confidential27-Jun-01, Slide 10

Calculation Flowchart (MFC)Calculation Flowchart (MFC)Calculation Flowchart (MFC)

Pulse input from USM Gross Volume Fr

Temperature

Pressure

Common Header FC

C6+ & H2O

ISO 6976/AGA 8

Std Density

Compressibility

Line DensityStd Volume Fr

Energy Fr

Mass Volume FrField Inputs

Heating Value

[File Name or Event]Emerson Confidential27-Jun-01, Slide 11

z Formulae for Turbine Meter application

z Gross Volume Increment/Total (bbls)

z Standard Volume Increment/Total (bbls)

z Mass Increment/Total (lbs)

z Gross Volume Flowrate (bbls/h)

z Standard Volume Flowrate (bbls/h)

z Mass Flow Rate (lbs/h)

MFXKFplsQv =

VCFmQvQvstd =

5.61458= mQvQm

MFXKF

fq v 3600=

VCFmqq vvstd =

61458.5= mvm qq

[File Name or Event]Emerson Confidential27-Jun-01, Slide 12

z Standard Density (60F, 14.696 psia)z

z Meter Volume Correction Factor

z

VCF std

line =

mm CPLCTL VCF =

[File Name or Event]Emerson Confidential27-Jun-01, Slide 13

z Symbols used in Equationsz Qv- Total gross volume increment- bblz Qvstd- Incremental total volume at standard conditions- Sbblz Qm- Mass total increment- Mlbsz pls Number of pulses from the turbine meter in the sample period-z KF- K-Factor-pls/bblz MF- Meter factorz Qm- Mass flow rate- M.lbs/hz Qv- Gross volume flow rate- bbls/hz Qvstd- Standard volume flow rate- Sbbls/hz m- Density at the meter- lbs/ ft3z std- Density corrected to standard conditions- lbs/ ft3z CTLm- Correction Factor for the effect of temperature on the Liquid at the meterz CPLm- Correction factor for the effect of pressure on the liquid at the meterz VCFm- Meter volume correction factor