Subsea Sampling on the Critical Path of Flow Assurance

Transcription

1 Subsea Sampling on the Critical Path of Flow Assurance Shailesh Rathood Product Champion, Schlumberger Hua Guan Flow Assurance Consultant, OneSubsea Devex 2016, May, Aberdeen UK

2 Outline Flow assurance along the fluid journey Fluid PVT and importance of representative samples Subsea sampling system Subsea sampling demo Project example subsea sampling application for scale squeeze optimization 2

3 Flow Assurance 3

4 Interacts with All Disciplines Across the Fluid Journey Topside Process Sim. Production Operations & Opt. Forecasting, Risks, and Sensitivities The Fluid Journey SS Surveill. Interv. MP Flow Metering Processing / Boosting Production chemicals Fluid Analysis & Modelling Steady State MP Flow Sim. Transient MP Flow Sim. Subsea Architecture Riser & Flowline Monitoring Solids Prec. & Depos. Wellbore Sim. PVT Completion The Project Development Timeline Sampling Inflow Performance Exploration PG1 Feasibility PG2 Concept Selection PG3 Definition PG4 Execution/ Implement. PG5 Operation PVT & Fluid Behavior Thermo Hydraulics Pressure & Liquid Mgmt Hydrates Wax & Asphaltenes Scale Corrosion & Erosion 4 Heavy Oil Operability Integrated Solutions Production System Architecture Production Optimization

5 PVT & Fluid Behavior Athabasca Bitumen r>1 Asphaltene Wax Inorganic scale Organic Scale Gas Hydrate 5

6 Pressure Hydrate Curve PVT & Fluid Behavior Reservoir P&T Start Facility Reservoir P&T Long-Term Look-a-head Temperature 6

7 Integrated Modeling to Diagnose and Optimize FA Problems Schlumberger Tools Third Party Wells / Pipelines Steady State Wells / Pipelines Dynamic PVT Analysis ScaleChem Scale Analysis MultiScale Reservoir Simulation Integrated Modeling Corrosion Analysis Wells / Pipelines OLI Analyzer Studio Prosper / GAP PVT Specialized Flow Assurance Economic Analysis Process Simulation HYSYS 7

8 Subsea Production Trends and Sampling Drivers 8

9 Multiphase Representative Sampling Strategically chosen, phase-rich sampling points Each phase is enriched and captured individually Isothermal and isobaric 9 OneSubsea Proprietary Information Do Not Duplicate or Distribute

10 Subsea Sampling System Subsea Sampling Hardware Sampling Interface Based on blind T, flexible access / retrievable Dual pressure barrier philosophy Sampling Module Isothermal and isobaric sampling Phase detection and phase enrichment ROV deployed skid Remotely controlled system Transportable sample receptacles Topside Equipment Subsea Sampling Services 10

11 OneSubsea Sampling System - Demo OneSubsea Proprietary Information Do Not Duplicate or Distribute 11

12 Project A Subsea Sampling for Scale Squeeze Optimization Offshore Scale Squeeze Procedure Injection of inhibitors and retention Inhibitor flowback for protection Sampling and Analysis Inhibitor residual -> Re-squeeze when < MIC Design Requirement Water Depth: 1100 m P/T: 10,000 psi and 121 degc Access: horizontal Samples: 4 x 600 cc Inhibitor concentration (ppm field return concentration (ppm) new modelled return concentration (ppm) 1000 previous modelled return concentration (ppm) cummulative water production (x1000 bbls) 12

13 Project A - Benefits Subsea Sampling Representative Samples Isobaric / isothermic Subsea units in place Reliable Analysis Enable accurate estimate of re-sqz time Scale Squeeze Optimization Integrated modelling for accurate prediction Reliable scale control -> prevention Reduce intervention frequency OPEX saving and increased up-time 13

14 Integrated Subsea Sampling and FA Risk Analysis Sampling interface Production management workflows Modelling, EoS, Uncertainty, and decisions Chain of Custody Sample extraction QA, condition, segregate, restoration, and transfer Analysis and reporting 14 OneSubsea Proprietary Information Do Not Duplicate or Distribute

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