Fiber Optic Monitoring

QOREX is heralding innovations in an all-fiber, intra-core optical technology - an elegant approach to solving many difficult problems in optical devices and systems.

QOREX is a leading fiber optic sensor design, engineering, and systems integration firm with expertise in harsh environment systems in oil & gas and emerging geothermal wells.

QOREX brings one of the fiber optic sensor industry's most experienced and successful teams with a impressive track record in development and commercialization of fully integrated systems-level fiber optic sensor products deployed in harsh environments- from high temperature, hydrogen-rich thermal recovery and deepwater oil and gas wells, to challenging nuclear radiation environments encountered in space and weapons platforms. While our focus is on systems integration, we also provide critical engineering and consulting services to augment client product development, expediting time to market, saving significant time and resources.

Particular areas of QOREX expertise include:

• Fiber optic sensor technology
• Harsh environment optical fiber and cable design
• Optical device design, packaging, and qualification
• Optical instrumentation
• Optical fiber design and manufacturing
• Bragg grating design and manufacturing

Brilliouin Distributed Temperature and Strain Sensor (DTSS)

QOREX has developed a proprietary (paten pendnig) method of accurate discrimination of temperature and strain in Brillouin. OTDR sensors, enabling accurate bi-modal temperature and strain measurement on standard single model sensing fibers. This technology will be especially useful in a range of applications that benefit from the distinct advantages Brilliouin technology offers. As a frequency-encoded measurement rather than intensity of Raman technology, Brillouin measurements are inherently insensitive to hydrogen-induced measurement error that severely impact Raman systems, that require complicated measurement protocols and dual-ended configurations to compensate these errors. Furthermore, the significant power advantage of Brillouin positions it to address a number of long reach applications such as pipeline, power distribution, and long subsea tie-back oil and gas systems.

Optical Flow Velocity Meter

QOREX has developed a proprietary Optical Flow Velocity Meter (patent pending) that likewise has no obstruction in the flow path, yet operates on a streamlined interrogation system and transducer design for a significant cost advantage. The QOREX solution allows operation of multiple flow velocity sensors along the same sensing fiber, which can also be interrogated with DTS and DTSS sensors, for multi-point, flow, temperature, and strain on the same downhole sensing fiber. In addition to this powerful suite of sensors, multi-parameter sensing allows for new possibilities in data interpretation and modeling over single parameter data.

Enhanced Geothermal Systems (EGS) Well Monitoring

Geothermal energy is being pursued as a potentially abundant, renewable energy source. Geothermal becomes attractive over some other renewable sources because of its potential scalability to provide a significant replacement of base-load electrical demand through use of advanced technology known as Enhanced Geothermal Systems (EGS). QOREX has been very active in the development and successful launch of optical thermal and pressure sensors in the thermal recovery sector of oil and gas, that operate up to targeted EGS temperature and pressure regimes. QOREX is working with EGS partners to address the challenges unique to deploying these sensors in the required depths and well completion.

Integrated DTS and Acoustic Systems

QOREX is pleased to offer integrated distributed temperature & acoustic sensor (DTAS) systems built upon a platform of commercially available Raman (DTS) and Coherent Rayleigh distributed acoustic instruments, optical sensing cables, and components. DTS technology provides accurate temperature measurement every meter or so along a passive optical sensing fiber up to several kilometers in length. The acoustic analog of DTS, distributed acoustic sensors detect acoustic or vibrational events acting along a sensing fibre, offering operators the ability at surface to “listen” to events happening in the well.

Coherent Raleigh optical time delay reflectometry (COTDR) has emerged as one of the more promising and commercially viable approaches over others that are more complicated and expensive to implement. QOREX has worked with the leader in optical phase detection and acoustic sensor interrogation technology to develop a COTDR instrument suitable for practical deploymentin oil and gas application environments. QOREX has integrated the COTDR with its high temperature DTS platform to offer an introductory integrated DTAS system. Correlating synchronous thermal and acoustic data holds the potential for new possibilities in monitoring flow, and identifying areas of phase changes and in- flows to provide greater insight into reservoir response to well operations and treatments. As a technology leader in upstream fibre optics, QOREX has been at the forefront of resolving high temperature effects on down-hole fibre optic systems in the thermal recovery sector.

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