OneSubsea Subsea Sampling System Shailesh Rathod 22 23 February 2017 Houston, TX Copyright 2017, Letton Hall Group. This paper was developed for the UPM Forum, 22 23 February 2017, Houston, Texas, U.S.A., and is subject to correction by the author(s). The contents of the paper maynot necessarily reflect the views of the UPM Forum sponsors or administrator. Reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of the Letton Hall Group is prohibited. Non-commercial reproduction or distribution maybe permitted, provided conspicuous acknowledgment of the UPM Forumand the author(s) is made. For more information, seewww.upmforum.com.
Agenda Representative Sampling System Overview Ongoing Projects Q&A
Why Sample? Almost all technical and economic studies in the oil industry require an understanding of the reservoir fluids
Multiphase Representative Sampling 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 during sampling in pressure or temperature will result in mass transfer within phases, rendering the sample non-representative of the production conditions. Isothermal and Isobaric processes are required for achieving the objective.
Subsea Sampling drivers
Subsea Sampling Applications Production Monitoring Reservoir Modeling and Management Flow Assurance Well Intervention Subsea Processing Enhanced Oil Recovery
OneSubsea Sampling System
Subsea Sampling components Subsea Sampling Hardware Sampling Interface Sampling Module Subsea Sampling Services
Subsea Sampling Interface Based on Blind T Two Sampling line for phase rich sample Fluid Circulation during sampling Configuration Xmas tree Manifold Multiphase Meter Retrievable module Lateral or vertical access
Subsea Sampling Module Isothermal & Isobaric Sampling Phase detection and phase enrichment ROV Deployed skid Remotely controlled system Transportable Sample receptacles
Subsea Sampling Module Separator with OPD Four Key Components Heated Water Bath Displacement Unit For Isobaric Sampling Separator For Phase Enrichment Optical Phase Detector For Phase Identification Sample Bottles For Sample storage & Transportation Complete Sampling Circuit in heated water bath for Isothermal Sampling
Subsea Sampling Services Includes all Resources and Activities involved in Sampling & Analysis Operations Equipment maintenance and life cycle management Sample Management Performed by Trained and Certified Personnel OneSubsea Responsibility - QHSE Operations & Support Sample Management Equipment Management Trained and Certified Personnel Typical oilfield services contract
Chain of Custody Sampling Interface Production Management Workflows Sample Extraction Chain of Custody Modelling, EoS, Uncertainty and Decisions QA, condition, segregate, restoration & transfer Analysis & Reporting
Key differentiators Sample Quality 3 Phase Representative Sampling. Isothermal and Isobaric Sample Enrichment & 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 Benefits Representative Subsea Sampling throughout life of field Flow Assurance Management and Risk mitigation Defines MPFM calibration and optimisation requirements Increased production and recovery rates CAPEX reduction Proven technology. Greenfield architecture optimal solution Retrofit potential for Brownfield application
Project A Design Pressure 5000psi # of Samples 4 Volume/Sample 600cc Design Water Depth 1100 meters Access Horizontal
Project A Sampling Interface Qualification and FAT completed to 10,000 psi and 121 C (standard SPS rating) 4 units delivered Sampling Module Critical internal components qualified to 5000 psi and 121 C Prototype flow loop test completed successfully EFAT and SIT completed May 2015 Delivery Dec 2015
System Testing
Subsea Operation
Project B Design Pressure 15,000 psi # of Samples 4 Volume/Sample 900 cc Design Water Depth 3000 meters Access Vertical Surface Skid
Project B Receiving Structure - FAT completed Impact Cover - FAT completed Saver Sub - FAT completed Long Term Cover - FAT completed Debris Cover - FAT completed Installed at Subsea in 2013 Retrievable Skid - Initial testing completed EFAT Completed - April 2015 Delivery - Dec 2015
System Testing
Subsea Operations
Thank You!! Questions??