Fiber Optic Strain Sensing at the Sand Face Enables Real-Time Flow Monitoring and Compaction Mitigation in Openhole Applications

2011 ◽  
Author(s):  
Denise M. Earles ◽  
Carl W. Stoesz ◽  
Nilufer Darius Surveyor ◽  
Alpha Liang ◽  
Hans DeJongh
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Strain Sensing ◽  
Flow Monitoring ◽  
Time Flow

Fiber Optic Installation at the Sand Face Enables Real-Time Flow Monitoring and Compaction mitigation in Openhole Applications

2011 ◽  
Author(s):  
Denise M. Earles ◽  
Cooper C. Gill ◽  
Carl W. Stoesz ◽  
Nilufer D. Surveyor ◽  
Jeremy G. Pearce ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Flow Monitoring ◽  
Time Flow

scholarly journals Dynamic motion monitoring of a 3.6 km long steel rod in a borehole during cold-water injection with distributed fiber-optic sensing

2021 ◽  
Author(s):  
Martin P. Lipus ◽  
Felix Schölderle ◽  
Thomas Reinsch ◽  
Christopher Wollin ◽  
Charlotte M. Krawczyk ◽  
...  
Keyword(s):  
Thermal Stresses ◽  
Fiber Optic ◽  
Cold Water ◽  
Water Injection ◽  
Strain Sensing ◽  
Distributed Temperature Sensing ◽  
Stick Slip ◽  
Temperature Changes ◽  
Flow Monitoring ◽  
Sucker Rod

Abstract. Fiber-optic distributed acoustic sensing (DAS) data finds many applications in wellbore monitoring such as e.g. flow monitoring, formation evaluation, and well integrity studies. For horizontal or highly deviated wells, wellbore fiber-optic installations can be conducted by mounting the sensing cable to a rigid structure (casing/tubing) which allows for a controlled landing of the cable. We analyze a cold-water injection phase in a geothermal well with a 3.6 km long fiber-optic installation mounted to a ¾” sucker-rod by using both DAS and distributed temperature sensing (DTS) data. During cold-water injection, we observe distinct vibrational events (shock waves) which originate in the reservoir interval and migrate up- and downwards. We use temperature differences from the DTS data to determine the theoretical thermal contraction and integrated DAS data to estimate the actual deformation of the rod construction. The results suggest that the rod experiences thermal stresses along the installation length – partly in the compressional and partly in the extensional regime. We find strong evidence that the observed vibrational events originate from the release of the thermal stresses when the friction of the rod against the borehole wall is overcome. Within this study, we show the influence of temperature changes on the acquisition of distributed acoustic/strain sensing data along a fiber-optic cable suspended along a rigid but freely hanging rod. We show that observed vibrational events do not necessarily originate from induced seismicity in the reservoir, but instead, can originate from stick-slip behavior of the rod construction that holds the measurement equipment.

Fiber-Optic Distributed Strain Sensing Needle for Real-Time Guidance in Epidural Anesthesia

2018 ◽  
Vol 18 (19) ◽  
pp. 8034-8044 ◽  
Author(s):  
Aidana Beisenova ◽  
Aizhan Issatayeva ◽  
Daniele Tosi ◽  
Carlo Molardi
Keyword(s):  
Real Time ◽  
Epidural Anesthesia ◽  
Fiber Optic ◽  
Strain Sensing ◽  
Distributed Strain

Integrating hydrograph modeling with real-time flow monitoring to generate hydrograph-specific sampling schemes

2010 ◽  
Vol 393 (3-4) ◽  
pp. 331-340 ◽  
Author(s):  
Heather E. Gall ◽  
Chad T. Jafvert ◽  
Byron Jenkinson
Keyword(s):  
Real Time ◽  
Sampling Schemes ◽  
Flow Monitoring ◽  
Time Flow

Real-Time Flow Assurance Monitoring With Non-Intrusive Fiber Optic Technology

2005 ◽  
Author(s):  
D.V. Brower ◽  
C.N. Prescott ◽  
J. Zhang ◽  
C. Howerter ◽  
D. Rafferty
Keyword(s):  
Real Time ◽  
Fiber Optic ◽  
Flow Assurance ◽  
Time Flow ◽  
Fiber Optic Technology

Smart Bridge: Autonomous Structural Integrity Monitor for Railroad Bridges

2020 ◽  
Author(s):  
Frank J. Smith
Keyword(s):  
Real Time ◽  
Structural Changes ◽  
Structural Integrity ◽  
Fiber Optic ◽  
Oil Well ◽  
Structural Elements ◽  
Strain Sensing ◽  
Continuous Fiber ◽  
Structural Element ◽  
Structural Problems

Abstract This paper provides an introduction to Smart Bridge; a railroad bridge structural integrity monitoring system based on Continuous Fiber Optic Strain Sensing (CFOSS) technology. This design concept allows for the real time observation of how a bridge responds to dynamic loading and provides for autonomous reporting of abnormal structural conditions. The CFOSS technology can monitor the entire bridge and observe changes in the behavure of its structural elements. The structure is constantly monitored, both when the structure is at static load and when the bridge is supporting the load of a train. When significant changes are observed they can be defined by location and the degree of deviation from normal. A Smart Bridge provides automatic notification of sudden changes to the structure in real time. These changes may be an indication of bridge impact damage. It also provides a graphical map of the changes in structural behavure over time. In both circumstances the technology will identify the specific structural element that is degrading. Smart Bridge is based on Continuous Fiber Optic Strain Sensing technology. This technology manifests in the form of a cable that is bonded along the entire length of the structural elements of the bridge. The cable senses strain in both the axial and transverse directions. Unlike conventional strain gauge elements that are bonded to a single location, CFOSS cables run continuously along the beam, plate or tendon. The technology is able to observe the changes in the concentration of strain along a structure and identify the origin of the change. CFOSS technology is currently under development as part of the Smart Rail project. The underlying fiber optic strain sensing cable technology is in commercial use in the oil well and petrochemical pipeline industry. The adoption of Smart Bridge provides enhanced operational safety because it monitors the structural integrity of the bridge continuously and provides automatic status annunciations. This monitoring is active during times when the bridge is in dead load and when it is supporting the load of a passing train. Smart Bridge also improves the working safety of bridge inspectors by providing a map of structural changes that may indicate hazardous conditions. The use of Smart Bridge improves the inspection process by identifying potential structural problems that may require visual confirmation. And it provides autonomous warnings when sudden changes in the bridge structural integrity are detected.

Real-time flow monitoring for a roller-based peristaltic mini-pump

2018 ◽  
Author(s):  
Antonio R. Xavier ◽  
Cleumar S. Moreira ◽  
Arlindo G. S. Barreto Neto ◽  
Antonio M. N. Lima ◽  
Helmut Neff ◽  
...  
Keyword(s):  
Real Time ◽  
Flow Monitoring ◽  
Time Flow ◽  
Mini Pump
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