Field Trial of a Downhole, Fiber Optic, Two-phase Flowmeter in PDO's Nimr Field

2002 ◽  
Author(s):  
Tor K. Kragas ◽  
Alex van der Spek ◽  
Khalid M. Al Hashmi
Keyword(s):  
Field Trial ◽  
Fiber Optic ◽  
Two Phase

Field trial experiment of CDMA fiber-optic microcellular system: FoMiCell

2003 ◽  
Author(s):  
J.M. Cheong ◽  
S.H. Seo ◽  
Y.S. Son ◽  
T.G. Kim ◽  
H. Kim ◽  
...  
Keyword(s):  
Field Trial ◽  
Fiber Optic

Investigation of the characteristics of a fiber-optic gas–liquid two-phase flow sensor

2020 ◽  
Vol 37 (10) ◽  
pp. 1687
Author(s):  
Yu Ma ◽  
Xu Zhang ◽  
Yangrui Zhang ◽  
Song Li ◽  
Weimin Sun ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Two Phase Flow ◽  
Flow Sensor ◽  
Phase Flow ◽  
Two Phase

A Field Trial of Fiber Optic Subscriber Loop Systems Utilizing Wavelength-Division Multiplexers

1982 ◽  
Vol 30 (9) ◽  
pp. 2172-2184 ◽  
Author(s):  
K. Asatani ◽  
R. Watanabe ◽  
K. Nosu ◽  
T. Matsumoto ◽  
F. Nihei
Keyword(s):  
Field Trial ◽  
Fiber Optic ◽  
Wavelength Division

Field Trial of a 4C Fiber Optic Seabed System

2004 ◽  
Author(s):  
S. Maas ◽  
J. Bunn ◽  
B. Bunn ◽  
R. Metzbower ◽  
J. Bowlus ◽  
...  
Keyword(s):  
Field Trial ◽  
Fiber Optic

Use of Fiber-Optic Information To Detect and Investigate the Gas-in-Riser Phenomenon

2021 ◽  
pp. 1-18
Author(s):  
Otto L. A. Santos ◽  
Wesley C. Williams ◽  
Jyotsna Sharma ◽  
Mauricio A. Almeida ◽  
Mahendra K. Kunju ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Fiber Optic ◽  
Research Effort ◽  
Pressure Sensors ◽  
Full Scale ◽  
Petroleum Engineering ◽  
Gas Migration ◽  
Two Phase ◽  
Engineering Research ◽  
Experimental Runs

Summary A potential application of optical fiber technologies in the well control domain is to detect the presence of gas and to unfold the gas dynamics inside marine risers (gas-in-riser). Detecting and monitoring gas-in-riser has become more relevant now when considering the application of managed pressure drilling operations in deep and ultradeep waters that may allow for a controlled amount of gas inside the riser. This application of distributed fiber-optic sensing (DFOS) is currently being evaluated at Louisiana State University (LSU) as part of a gas-in-riser research project granted by the National Academies of Sciences, the Gulf Research Program (GRP). Thus, the main objective of this paper is to present and discuss the use of DFOS and downhole pressure sensors to detect and track the gas position inside a full-scale test well during experimental runs conducted at LSU. The other objectives of this work are to show experimental findings of gas migration in the closed test well and to present the adequacy of a mathematical model experimentally validated to match the data obtained in the experimental trials. As a part of this research effort, an existing test well at the LSU Petroleum Engineering Research and Technology Transfer Laboratory (PERTT Lab) was recompleted and instrumented with fiber-optic sensors to continuously collect data along the wellbore and with four pressure and temperature downhole gauges to record those parameters at four discrete depths. A 2⅞-in. tubing string, with its lower end at a depth of 5,026 ft, and a chemical line to inject nitrogen at the bottom of the hole were also installed in the well. Seven experimental runs were performed in this full-scale apparatus using fresh water and nitrogen to calibrate the installed pieces of equipment, to train the crew of researchers to run the tests, to check experimental repeatability, and to obtain experimental results under very controlled conditions because water and nitrogen have well-defined and constant properties. In five runs, the injected gas was circulated out of the well, whereas in two others, the gas was left inside the closed test well to migrate without circulation. This paper presents and discusses the results of four selected runs. The experimental runs showed that fiber-optic information can be used to detect and track the gas position and consequently its velocity inside the marine riser. The fiber-optic data presented a very good agreement with those measured by the four downhole pressure gauges, particularly the gas velocity. The gas migration experiments produced very interesting results. With respect to the mathematical model based on the unsteady-state flow of a two-phase mixture, the simulated results produced a remarkable agreement with the fiber-optic, surface acquisition system and the downhole pressure sensors data gathered from the experimental runs.

Field Trial of a Novel Non-Intrusive Method for In-Service PMD Measurements in Fiber-Optic Networks

2012 ◽  
Author(s):  
Tiejun J. Xia ◽  
Glenn A. Wellbrock ◽  
Daniel L. Peterson ◽  
Fred Heismann ◽  
Vincent Lecoeuche ◽  
...  
Keyword(s):  
Field Trial ◽  
Fiber Optic ◽  
Fiber Optic Networks

scholarly journals Post-Installed Fiber Optic Pressure Sensors on Subsea Production Risers for Severe Slugging Control

2015 ◽  
Author(s):  
Ammon N. Eaton ◽  
Seyed Mostafa Safdarnejad ◽  
John D. Hedengren ◽  
Kristie Moffat ◽  
Casey B. Hubbell ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Flow Instability ◽  
Pressure Sensors ◽  
Offshore Structures ◽  
Fiber Optic Sensors ◽  
Mooring Lines ◽  
Two Phase ◽  
Pressure Sensing ◽  
Fbg Sensor ◽  
Control Schemes

Fiber optic sensors have gained increasing use in monitoring offshore structures. The sensors have successfully monitored flowlines, umbilicals, wells, Tension Leg Platform (TLP) tendons, production and drilling risers, and mooring lines. Fiber optic sensors are capable of monitoring strain, temperature, pressure, and vibration. While the success of fiber optic monitoring has been clearly demonstrated, the sensors are now under consideration for automation applications. This paper details the plausibility of using pressure measurements from post-installed fiber Bragg grating (FBG) sensors with Model Predictive Control (MPC) to suppress severe slugging in subsea risers. Prior control schemes demonstrate that slugging is mitigated using a topside choke valve. The most effective methods use a pressure measurement immediately upstream of the touchdown zone of the riser; however, the majority of production risers do not have pressure sensing at that location. With advances in subsea clamp design and bonding it is now possible to install a non-penetrating FBG sensor to monitor pressure near the touchdown zone without shutting down production. Stabilizing the two phase flow both reduces vibration-induced fatigue and has the potential to allow increased throughput with relaxed topside processing constraints. MPC predicts and adjusts for disturbances to avoid pressure and flow instability. The performance of the controller is influenced by sensor location, choke valve response time, and riser geometry. This study demonstrates that severe riser slugging is effectively controlled with MPC and a post-installed, non-penetrating FBG sensor.

Development of Fiber-Optic Probes to Measure Two-Phase Flow Dynamic Parameters in Support of Flow-Induced Vibration Studies

2014 ◽  
Author(s):  
M. J. Pettigrew ◽  
B. Besner ◽  
N. W. Mureithi ◽  
T. Lafrance ◽  
J. M. Patrick
Keyword(s):  
Liquid Phase ◽  
Flow Velocity ◽  
Gas Phase ◽  
Void Fraction ◽  
Fiber Optic ◽  
Phase Flow ◽  
Flow Induced Vibration ◽  
Two Phase ◽  
Local Flow ◽  
Fiber Optic Probes

Flow-induced vibration in two-phase flows requires the knowledge of flow regime and detailed flow characteristics. This paper outlines the development of fiber-optic probes to measure void fraction, local flow velocity and characteristic size (i.e., bubble diameter) of the two-phase mixture. The principle of operation of such probes is based on the difference in index of refraction between the liquid phase and the gas phase when in contact with a fiber-optic probe supplied with a laser light. The reflected signal levels for the gas phase and the liquid phase are very different thus providing a reliable measure of void fraction. The paper describes the development of fiber-optic probes for measurements of internal two-phase flow in pipes and of external flow across a tube bundle. The use of double probes allows the measurements of local flow velocity and bubble size. Some detail measurements of flow in the gap between tubes in cross flow are presented. The fabrication of the very small and fragile probes required much development effort. The paper describes the difficulties and the solutions to assure good quality probes. Some data processing and data interpretation issues are also discussed.

Sign in / Sign up

Export Citation Format

Share Document