The Importance of Water Detection in Risk-Based Flow Assurance...
22
The Importance of Water Detection in Risk-Based Flow Assurance Strategies: Examples from Egypt and Indonesia London, 26th of March 2015 Svein Erik Gregersen Manager Flow Metering Roxar Flow Measurements Copyright © 2015
Transcript of The Importance of Water Detection in Risk-Based Flow Assurance...
The Importance of Water Detection in Risk-Based Flow Assurance Strategies: Examples from Egypt and Indonesia
London, 26th of March 2015Svein Erik Gregersen
Manager Flow MeteringRoxar Flow Measurements
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 2
Agenda Agenda Water Production and Flow Assurance Subsea Wetgas Metering Technology Case study 1: Burullus West Delta Deep
Marine Case study 2: Chevron Indonesia Deepwater
Development Summary
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 3
Formation Water BreakthroughFormation Water Breakthrough Reservoir management:
– Formation water production.– Coning of water.– Increasing recovery demands.
Onset of saline water can cause:– Corrosion.– Scaling.– Sand production.– Hydrates
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 4
Copyright © 2015
Hydrate Formation – The four critical stages of a plug formingHydrate Formation – The four critical stages of a plug forming
1. Water droplets emerge2. Hydrate nucleation, growth at the water-hydrocarbon interface3. Hydrate particles form large aggregates4. Jamming of large aggregates to suspend flow
Time / Risk / Cost of mitigation
Source: Luis E. Zerpa
CRITICALTIME WINDOW
[File Name or Event]Emerson Confidential27-Jun-01, Slide 5
Hydrate Formation and MEG OptimizationHydrate Formation and MEG Optimization Continuous lean MEG injection is the current
main plan of attack.– Effectiveness of MEG distribution system is critical for
production– High cost of downtime.
Challenge– Optimize MEG system design based on risk based
injection strategies– Realtime information on hydrate formation triggers!
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 6
Roxar Subsea Wetgas TechnologyRoxar Subsea Wetgas Technology
– Specifically designed for wetgas applications
– Allowing accurate measurements and unique sensitivity to changes in water content• Optimized performance for early detection of water
breakthrough
Oil Water
Gas
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 7
Copyright © 2015
Roxar Subsea Wetgas TechnologyRoxar Subsea Wetgas Technology Main measurements
• Differential pressure (over cone)
• Microwave measurements• Gamma measurement• Pressure• Temperature• Salinity Measurement
Copyright © 2012
Based on Roxar’s 25 years experience using Microwave technology for high GVF applications.
Builds on the first generation wet gas meter launched in 2002 as part of a JIP to meet industry demands.
Installed base world wide– Approx 260 SubseaWGM– Approx 100 Topside WGM
First installed subsea 2004
[File Name or Event]Emerson Confidential27-Jun-01, Slide 8
Unmatched Water Measurement Accuracy and SensitivityUnmatched Water Measurement Accuracy and Sensitivity
WVF Accuracy:
– GVF ~ 99%: ±0.02 abs. vol.%– GVF > 98%: ±0.1 abs. vol.%– GVF < 98%: ±0.2 abs. vol.%
Water Sensitivity: – < 0.00002 absolute volume%
(0,2ppm)
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 9
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 10
Copyright © 2015
New to the world: Accurate Salinity Measurement for Wetgas applicationsNew to the world: Accurate Salinity Measurement for Wetgas applications Dedicated salinity sensor for gas
applications. Fully integrated into the meter.
Outputs:SalinityConductivityFormation Water IndicatorFormation water flow rate
This:
...is more than enough. One droplet is detectable.
[File Name or Event]Emerson Confidential27-Jun-01, Slide 11
51 Subsea meters delivered 34 meters in operation to date
• The Field: West Delta Deep Marine (Egypt)
• Operator: Burullus (JV BG, Petronas, EGPC)
Case study 1Case study 1
Copyright © 2015
[File Name or Event]Emerson Confidential27-Jun-01, Slide 12
Copyright © 2015
Case study 1
[File Name or Event]Emerson Confidential27-Jun-01, Slide 13
Copyright © 2015
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
Gas: 75 mmscfd
Water: 10 bpd
[File Name or Event]Emerson Confidential27-Jun-01, Slide 14
Copyright © 2015
Gas: 75 mmscfd
Water: 10 bpd
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
[File Name or Event]Emerson Confidential27-Jun-01, Slide 15
Copyright © 2015
Gas: 75 mmscfd
Water: 10 bpd
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
[File Name or Event]Emerson Confidential27-Jun-01, Slide 16
Copyright © 2015
Gas: 75 mmscfd
Water: 10 bpd
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
[File Name or Event]Emerson Confidential27-Jun-01, Slide 17
Copyright © 2015
Gas: 75 mmscfd
Water: 10 bpd
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
[File Name or Event]Emerson Confidential27-Jun-01, Slide 18
Copyright © 2015
Gas: 75 mmscfd
Water: 10 bpd
Field Experience – an Example (WDDM)Water Breakthrough Detection by Using Roxar SWGM
[File Name or Event]Emerson Confidential27-Jun-01, Slide 19
Case study 2: Chevron Indonesia Deepwater DevelopmentCase study 2: Chevron Indonesia Deepwater Development
[File Name or Event]Emerson Confidential27-Jun-01, Slide 20
Copyright © 2015
Technology philosophy applied for IDDTechnology philosophy applied for IDD
Challenges for Chevron:Condensate measurement and production managementWater detection and flow assuranceComplex transients and critical point production profilesMaximum performance focus for life of field.
Solutions from Roxar:Next generation software packageFuture proof design to allow salinity measurement (Q1.2015)Gamma densitometer system
•Robustness against CGR uncertainty close to critical point.•The GVF measurements at low GVF’s (85 - 95%), will be less dependent of the internal PVT calculations.•Combined measured WVF (µw) and GVF (Ɣ) enables the SWGM to solve for the unknown CVF.•Added robustness against variation in the composition
[File Name or Event]Emerson Confidential27-Jun-01, Slide 21
Copyright © 2015
SummarySummary The onset of produced formation water represents a
major risk to the subsea system and well production:– Flow Assurance
• Costly risk based preventive measures– Reservoir Management
• Loss of production• Loss of well
Wetgas metering technology:– Addressing specific needs of wetgas applications
• Accuracy• Sensitivity• Salinity Measurement
– Reducing risk («Well insurance»)– Reducing cost (capex/opex)
[File Name or Event]Emerson Confidential27-Jun-01, Slide 22
Thank You For Your Attention!Thank You For Your Attention! Questions?
Contact details:– [email protected]– Office +47 51 81 89 86
Copyright © 2015
