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e-petroleumservices. com Business Benefits Delivered through True Valve Performance Yvonne Roberts Edinburgh Petroleum Services e-petroleumservices. com Business Benefits Delivered through True Valve Performance Yvonne Roberts Edinburgh Petroleum Services 1

Introduction e-petroleumservices. com $$ i-AM Total System Optimisation Well Modelling True Valve Performance 2 Introduction e-petroleumservices. com $$ i-AM Total System Optimisation Well Modelling True Valve Performance 2

intelligent Asset Management e-petroleumservices. com • intelligent Asset Management is maximising the value that intelligent Asset Management e-petroleumservices. com • intelligent Asset Management is maximising the value that an oil or gas field delivers over its life from discovery to abandonment. – Initial investment (optimise strategy for production) – Daily Operations (optimise investments already made) – Planning (optimise timing and amount of future investments) • For any producing asset, the first element is complete and the major emphasis is on intelligent Operation and Planning. 3

True Valve Performance (TVP) e-petroleumservices. com Qprod @ THP Qgi @CHP TVP • Valve True Valve Performance (TVP) e-petroleumservices. com Qprod @ THP Qgi @CHP TVP • Valve Data custom-measured by Valve Performance Clearinghouse • Measured data, not generic correlations • Data specific to valve type and port size • Accuracy! Qgi Thornhill-Craver/orifice IPR 4 Gas-charged valve Pdown

Data Flow e-petroleumservices. com On-line integration with SCADA systems Off-line activities Steady-state Tuning and Data Flow e-petroleumservices. com On-line integration with SCADA systems Off-line activities Steady-state Tuning and Analysis Gas-Lift and Total System Optimisation Well Model Tuning Gas-Lift Diagnosis 5 Well Models with TVP Dynamic Gas -Lift Analysis

Total System Optimisation e-petroleumservices. com Oil + Water +$ -$ e Produced Gas = Total System Optimisation e-petroleumservices. com Oil + Water +$ -$ e Produced Gas = Qgf+Qgi rg Fuel, Qgc -$ Su Lift Gas, Qgi Compressors Pdisch Other uses = Qgf-Qgc +$ TVP provides the link all w Stone Qsuction Qoil Gas-lifted Wells CHP 6 Formation Gas, Qgf (Curves for one THP) Gas Injection Rate

Valve Stability e-petroleumservices. com PT @valve Valve performance curve for a given CHP Increasing Valve Stability e-petroleumservices. com PT @valve Valve performance curve for a given CHP Increasing CHP (and PC @valve) Unstable operating point Tubing Performance for a given THP Limit of valve stability Amount of gas injected by that valve at the given Casing and Tubing pressures Minimum stable gas injection rate 7 Qgi

Re. O Optimisation e-petroleumservices. com Multiphase Optimisation Produced Fluids from Production Manifold Flow Group Re. O Optimisation e-petroleumservices. com Multiphase Optimisation Produced Fluids from Production Manifold Flow Group 3 Wells Flow Group 2 Wells Flow Group To other Flow Groups Gas Injection Manifold (Pm 1, Tm 1) 8 To other Flow Groups Gas Injection Manifold (Pm 2, Tm 2)

On-line Diagnosis (Sedilag) e-petroleumservices. com Read SCADA Surface Production Data Check Gas Supply Status On-line Diagnosis (Sedilag) e-petroleumservices. com Read SCADA Surface Production Data Check Gas Supply Status Calculate deepest possible point of injection Check Production Status Check which valve(s) open and the opening margin(s) Advise operator and recommend remedial action if necessary 9 Depth Check complete pressure drop from CHP to THP using valve models PCas Mandrel 1 PTub Mandrel 2 Mandrel 3 Mandrel 4 Pressure

Dynalift e-petroleumservices. com Qgi(t) Inflow 10 Dynalift e-petroleumservices. com Qgi(t) Inflow 10

Benefits through Optimisation e-petroleumservices. com • Venezuela/Maracaibo – automated optimisation and GL-diagnosis • 250 Benefits through Optimisation e-petroleumservices. com • Venezuela/Maracaibo – automated optimisation and GL-diagnosis • 250 wells leading to gains worth around $36 Million/annum • Kuwait – automated optimisation and performance analysis • >400 wells with projected impact of $100 -175 Million/annum • Norway/Ekofisk – impact assessment of Ekofisk II/integration with SCADA • sustain increased production worth ~ $180 Million/annum • North Sea – analysis and optimisation of single well performance • prevention of over-intervention yielded production increase of ~ $1000/d. 11

e-petroleumservices. com Business Benefits Delivered through True Valve Performance Yvonne Roberts Edinburgh Petroleum Services e-petroleumservices. com Business Benefits Delivered through True Valve Performance Yvonne Roberts Edinburgh Petroleum Services 12