Chairpersons: Gregorio Gonzalez, Shell and Taber Hersum, Equinor

Fiber optics interpretation and modeling have provided invaluable insights to the oil and gas industry about the behavior and performance of reservoirs and wells. Over the last decade, great achievement has been accomplished in this arena, both on distributed temperature and acoustic data.

This session is dedicated to FO sensing application case studies demonstrating the value by showing interpretation and modeling workflows (real/near time, or medium-term), including new interpretation methodologies to address the challenges associated with life-of-field monitoring.

Presentations:

• Interpretation Strategy for Annulus Monitoring Using Fiber Optic Sensing Data
  Kjetil Haavik, Equinor
• Understanding Downhole Flow Condition Based on DAS and DTS Monitoring and Interpretation
  Ding Zhu, Texas A&M University
• Production Optimization using Wireless High-Resolution Distributed Temperature Across the Reservoir
  David Lavery, Metrol
• A Comparative Assessment of Life of Well Monitoring: Multi-Point Array and Fiber Optics
  Glen Breerwood, Halliburton

Chairperson: Andres Chavarria, LUNA OptaSense and Dan Hill, Texas A&M University

Management of assets with fiber optic sensing enables real time surveillance of wells. Well integrity is a critical aspect of this surveillance as it can impact production and injection processes. This session highlights the use of distributed fibre sensing for integrity monitoring and new developments within this area. This includes data acquisition, integration, interpretation and case studies.  Of particular focus is how the fiber technology enables the identification of events and remedial actions taken to address them.

Presentations:

• The Value of Information for Well Integrity
  Danilo Colombo, Petrobras
• Leak Detection
  Kjetil Haavik, Equinor
• Riser Integrity Monitoring in Subsea Wells
  Bruno Sapha, Ouronova
• Distributed Fiber Optic Sensing Technology for Well Integrity Monitoring
  Alexis Mendez, MCH Engineering, LLC

Chairpersons: Alexandre Cardoso, Petrobras and Corinne Sagary, Alcatel Submarine Networks

This session is dedicated to case studies showing the state of the art and fan of seismic applications from subsea fiber sensing. Fiber sensing offers promising downhole and seabed seismic permanent monitoring of oil and gas reservoirs as well as of carbon storage sites. Other potential uses include marine mammals monitoring, mid-ocean ridge activities recording (earthquakes), and ocean storms tracking. It exists different implementations of fiber sensing with optical sensors, such as hydrophones and accelerometers, or based on the distributed strain sensing along the fiber itself, commonly called DAS (Distributed Acoustic Sensing). Dedicated cables and fibers can be deployed but existing telecom cables provide huge potential fiber sensing.

Presentations:

• New Insights into the Processing and Imaging of Surface DAS Data from Modelling and Field Experience
  Ran Bachrach, SLB
• Unlocking New Frontiers with Long Range DAS
  Susann Wienecke, ASN
• Surface Fiber Optic Cables for Passive Seismic Monitoring of CO2 Storage
  Estelle Rebel, TotalEnergies
• Automatic Location Processing of Microseismic Events Using Continuous Passive Seismic LoFS Data From the Ekofisk Field, Norway
  Volker Oye,  Kamran Iranpour, Ben Dando, NORSAR, Sirikarn Narongsirikul, Per Gunnar Folstad,  ConocoPhillips

Chairpersons: Andy Greek, Halliburton and Steven Mathias, Weatherford

Irrespective of the completion design, the installation of fiber optics across the reservoir opens a wide range of reservoir and production monitoring application, such as producer/injector profiling, sand control, and reservoir conformance. Modeling and flow loop testing are being used to develop quantitative interpretation for real-time production profiling. Recent case studies from dry-tree wells will be presented as analogs, with discussion about differences expected for subsea wells.

Presentations:

• DAS/DTS Surveillance Technologies for Inflow or Outflow Performance Optimization
  Clifford Allen, Halliburton
• Water Injection Monitoring in a Carbonate Reservoir
  Garth Naldrett, Silixa
• Enhancing Production Profiling with Fiber Optic Technology
  Lena Urmantseva, AP Sensing

Chairperson: Sergio Taveira, Petrobras and Ding Zhu, Texas A&M University

Well stimulation performance depends on the quality of the input data and its agreement with the real characteristics of the formation. There are some limitations on log profiles before and after the operation and the lack of sensing tools in front of the reservoir makes it impossible to assure that the stimulation operation went just as it was designed. This session is dedicated to discussing the use of permanent fiber optic monitoring before, during and after the well stimulation and its results in designing and measuring the result of the operation using DAS and/or DTS for proper fracking/acid injection in the corresponding formation.

Presentations:

• Determining Injection Fluid Distribution during Acid Stimulation Using Distributed Temperature Sensor (DTS) Measurements
  Ding Zhu, Texas A&M University
• Autonomous and Continuous Seismic Monitoring Using Distributed Acoustic Sensing (DAS)
  Julia Correa, Lawrence Berkeley National Laboratory
• Deepwater Matrix stimulation Diagnosis and Improvement: Possibilities Using Fiber Optics
  Mateus Palharini Schwalbert, Petrobras
• Current and Future States of Subsea Well Stimulation Monitoring
  Andy Greek, Halliburton

Chairpersons: Don Craig, bp, Emilio Coutinho, Petrobras

This session aims to discuss valuation strategies and show cases of success where the value brought by the technology can be demonstrated.
Although the perception of the added value by fiber optic sensing technology is unquestionable, translating this value into numbers – which is essential for decision making – is not trivial task to achieve. Particularly, wet completions pose some challenges for the fiber optics application, requiring not only the investment in acquiring the hardware but also R&D to develop key missing components.

Presentations:

• Fiber Optics Values Chains in the Subsurface - Atlantis 3D DAS Imaging and Monitoring Project
  Sam Buist, bp
• Value Realization for DFOS at Johan Sverdrup and Martin Linge fields
  Taber Hersum, Equinor
• Exploring the Potential of Seabed Distributed Acoustic Sensing (DAS) for Seismic Monitoring
  Thomas Jules Browaeys, TotalEnergies