shailesh rathod 13 february 2015 - subsea uk · 4 multiphase representative sampling subsea...
TRANSCRIPT
Subsea Sampling ServiceShailesh Rathod
13 February 2015
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Agenda
Background
Applications
Systems Overview
Ongoing Projects
Q&A
Subsea Sampling Service
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Why Sample?
Subsea Sampling Service
Almost all technical and economic studies
in the oil industry require an
understanding of the reservoir fluids
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Multiphase Representative Sampling
Subsea Sampling Service
Sample quality is critical for accurate
analysis and reliable fluid properties.
A representative sample in a multiphase
flow is an uncontaminated sample having
the same molecules in the same
proportions as the flow at the sampling
point where all three phases are in
equilibrium.
Significant change in pressure or
temperature during sampling will result in
mass transfer within phases, rendering
the sample non-representative of the
production conditions.
Isothermal and Isobaric process is
required for achieving the objective.
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Subsea Production Trends and Sampling Drivers
Subsea Sampling Service
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Subsea Sampling Applications
Production monitoring
Flow assurance
Well intervention optimization
Subsea processing
Reservoir modeling and management
Enhanced oil recovery (EOR/IOR)
Subsea Sampling Service
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OneSubsea Sampling System
Subsea Sampling Service
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Subsea Sampling Components
Subsea sampling hardware–Sampling interface
–Sampling module
Subsea sampling services
Subsea Sampling Service
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Subsea Sampling Interface
Based on Blind T
Two sampling line for phase-rich sample
Fluid circulation during sampling
Configuration –Subsea tree
–Manifold
–Multiphase meter
–Retrievable module
–Lateral or vertical access
Subsea Sampling Service
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Subsea Sampling Module
Isothermal and isobaric sampling
Phase detection and phase enrichment
ROV deployed skid
Remotely controlled system
Transportable sample receptacles
Subsea Sampling Service
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Subsea Sampling Module
Four key components
Displacement unit–For isobaric sampling
Separator –For phase enrichment
Optical phase detector–For phase identification
Sample bottles–For sample storage and transportation
Complete sampling circuit in heated water
bath for isothermal sampling
Subsea Sampling Service
Heated water bath
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Subsea Sampling Module
Complete sampling circuit in heated water
bath for isothermal sampling
Heated water bath
Separator with OPD
Subsea Sampling Service
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Subsea Sampling Services
Includes all resources and activities
involved in–Sampling and analysis operations
–Equipment maintenance and lifecycle
management
–Sample management
Performed by trained and certified
personnel
OneSubsea responsibility–QHSE
–Operations and support
–Sample management
–Equipment management
–Trained and certified personnel
Typical oilfield services contract
Subsea Sampling Service
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Scope of Supply
Subsea Sampling Service
Inte
gra
ted
Pro
ce
sse
s a
nd
pro
ce
dure
s
Operator
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Chain of Custody
Sample Extraction
QA, Condition,
Segregate,
Restoration and
Transfer
Analysis and
Reporting
Modelling, EoS,
Uncertainty and
Decisions
Chain of
Custody
Sampling Interface
Production
Management
Workflows
Subsea Sampling Service
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Key Differentiators
Sample quality–3-phase representative sampling
–Isothermal and isobaric
Sample enrichment and monitoring–Fluid circulation
–Optical Phase Detectors (OPD)
Safety –Fails safe close — dual pressure barrier valves
–Software workflows
Integrated system–Complete chain of custody
Subsea Sampling Service
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Subsea Sampling Benefits
Representative subsea sampling throughout the life of the field
Flow assurance management and risk mitigation
Defines MPFM calibration and optimization requirements
Increased production and recovery rates
CAPEX reduction
Proven technology
Greenfield architecture optimal solution
Retrofit potential for brownfield application
Subsea Sampling Service
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Project A
Design pressure: 5000 psi
Number of samples: 4
Volume/sample: 600 cc
Design water depth: 1100 m
Access: horizontal
Subsea Sampling Service
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Project A
Sampling Interface–Qualification and FAT completed (standard
SPS rating)
–4 units delivered
Sampling Module–All internal components qualified
–Prototype flow loop test completed
successfully
–EFAT and SIT – March 2015
–Delivery – April 2015
Subsea Sampling Service
2020
Project B
Subsea Sampling Service
Design pressure: 15,000 psi
Number of samples: 4
Volume/sample: 900 cc
Design water depth: 3000 m
Access: vertical
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Project B
Subsea Sampling Service
Installed at subsea in 2013
Receiving structure–FAT completed
Impact cover–FAT completed
Saver sub–FAT completed
Long-term cover–FAT completed
Debris cover–FAT completed
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Project B
Subsea Sampling Service
Retrievable skid–Initial testing completed
EFAT–January 2015
Deliver –February 2015
Thank you.