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WellFlo

Feature Presentation

Reservoir

Wellflo

Nodal Analysis

Software

© 2010 Weatherford. All rights reserved.

Nodal Analysis

2

Inflow

Outflow

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Key Features

• Production and Injection wells for all reservoir types

– Black Oil, Condensate, Volatile Oil and Dry Gas

– Vertical and Horizontal

• Choice of Black Oil PVT Correlations and Equation of State Based

Compositional PVT with Tuning Functionality

• Inflow Performance Relationship (IPR) Models

– Vogel, Fetkovich, Normalized Pseudo-Pressures, etc

• Choice of Flow Correlations for Pressure Drop Calculations

– Beggs and Brill, Duns and Ros, OLGAS, etc

• Flow Assurance

– Hydrate, Wax and Asphaltene

© 2010 Weatherford. All rights reserved.

WellFlo: Tuning

• Flow Correlations

– OLGAS : Mechanistic Model

– Tuning

• Multiple Flow Gradient Survey Datasets

• Simultaneous Tuning of Multiple Flow Correlations

• IPR Tuning

– Multiple Production Well Test Datasets

– IPR model tuning using one or more test data sets

• Reservoir Pressure

• Permeability

• Skin

• Vogel Coefficient

• Productivity Index (J)

© 2010 Weatherford. All rights reserved.

WellFlo : Gas Lift and ESP

• Design

Database of Gas Lift Valves, Pumps and Motors

• Performance Analysis

Troubleshooting

• Advanced Gas Lift Valve Modelling and Optimisation

© 2006 Weatherford. All rights reserved.

Horizontal Well

© 2006 Weatherford. All rights reserved.

Equation of State Based Compositional PVT

• PVTFlexTM : PVT Software Application

• Fluid Data Pre-Processing

• Plus Fraction Characterization Including Pseudo Component Generation

• Common Fluid Description

– Mixing of Fluids

• Choice of Equations of State

– Including Peng Robinson and SRK (with Peneloux Volume Shifts)

• Tuning of EoS using typical lab data

– CCE, CVD, DL, Separator Data

• Multi-fluid multi-experiment tuning algorithm based on non-linear regression

– Tuning Parameters

– Different weights to different Experiments

© 2010 Weatherford. All rights reserved.

Flow Assurance Calculations

• Alliance with Infochem Ltd, UK

– Hydrate, Wax and Asphaltene modules available in their “Multiflash”

Software

– Customer base : Around the world including many multi-national

companies

• Implementation

– Seam-less Integration with Engineering Applications

• No need to copy & paste data to and from another application

– Available for Compositional as well as Black oil PVT

• Black oil PVT data is translated to compositional form

– In-situ fluid composition is used for the calculations

• Easy analysis above and below the gas injection point

8

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PVTflex : Flow Assurance Calculations

9

Simulated Pressure &

Temperature Profile For

Monthly Production

Well Test using Wellflo

Evaluate possibility of

hydrate formation in

the well.

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Hydrate Curve and PT Profile

10

Hydrate

RegionCan this

hydrate

formation

avoided?

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Hydrate Inhibitor Management

11

Hydrate

Region

with

Inhibitor

Choice of Industry

Standard Inhibitors

Available for

Analysis

• Methanol

• Ethanol

• MEG

• DEG

• TEG

25 vol %

Methanol

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WellFlo: PCP and Jet Pumps

• PCP

– Operating Point Analysis

• Jet Pump

– Analysis

– Design

• List of all Suitable Pump combinations

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PCP: Performance Curve

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Jet Pump : Design Functionality

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Well Performance Server – Wellflo Integration

15

Open Interface Layer

Wellflo Calculation Engine

ReO

Wellflo Graphic User Interface (.NET Technology)

RFC i-DO Matbal MS Excel

WPS

LOWIS

© 2006 Weatherford. All rights reserved.Slide 16

Case Study

• Operator : ONGC (one of the major operators from India)

• Field : Heera (Offshore of Mumbai)

• 5 Processing Platforms + 14 Remote Satellite Wellhead Platforms

• 120 Wells

– Naturally Flowing

– Gas lifted

• Total Production

– Oil: ~ 50,000 BPD

– Gas Oil Ratio: 120 m3/m3

– Water Cut: 55%

• SPE 101089 : Presented in SPE AP Conf in Sept 2006

© 2006 Weatherford. All rights reserved.Slide 17

Project Objectives

• Build Wellflo Models for every well in the field

• Calibrate Well Models

• Perform Lift Optimization using Wellflo

• Knowledge Transfer (WellFlo)

• Model Update and Workflow Processes

© 2006 Weatherford. All rights reserved.Slide 18

Well Modeling Study : Results

• Gas Lift Redesign /

Optimization potential:

– 22 Candidates with more

than 50 BOPD uplift

– 5 candidates require only

gas lift rate optimization

– 17 candidates for gas lift

redesign

• 12 candidates with

potential gain of more

than 100 BOPD (top

priority)

Lift Gain (~100+BOPD) Potential Well

0

100

200

300

HC

-5

HS

A-2

#

HD

-10

HC

-3

HB

-12

HF

-10

#

HS

B-2

HT

-10

HC

-2

HS

B-5

HS

B-1

HS

A-1

Well Name

Oil G

ain

(S

tb/d

)

© 2010 Weatherford. All rights reserved.

WellFlo Customers