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© 2010 Weatherford. All rights reserved.
WellFlo
Feature Presentation
Reservoir
Wellflo
Nodal Analysis
Software
© 2010 Weatherford. All rights reserved.
Nodal Analysis
2
Inflow
Outflow
© 2010 Weatherford. All rights reserved.
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
© 2010 Weatherford. All rights reserved.
PVTflex : Flow Assurance Calculations
9
Simulated Pressure &
Temperature Profile For
Monthly Production
Well Test using Wellflo
Evaluate possibility of
hydrate formation in
the well.
© 2010 Weatherford. All rights reserved.
Hydrate Curve and PT Profile
10
Hydrate
RegionCan this
hydrate
formation
avoided?
© 2010 Weatherford. All rights reserved.
Hydrate Inhibitor Management
11
Hydrate
Region
with
Inhibitor
Choice of Industry
Standard Inhibitors
Available for
Analysis
• Methanol
• Ethanol
• MEG
• DEG
• TEG
25 vol %
Methanol
© 2010 Weatherford. All rights reserved.
WellFlo: PCP and Jet Pumps
• PCP
– Operating Point Analysis
• Jet Pump
– Analysis
– Design
• List of all Suitable Pump combinations
© 2010 Weatherford. All rights reserved.
PCP: Performance Curve
© 2010 Weatherford. All rights reserved.
Jet Pump : Design Functionality
© 2010 Weatherford. All rights reserved.
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