A VSP Field Trial Using Distributed Acoustic Sensing in a Producing Well in the North Sea

Madsen, K. N.; Parker, Tom; Gaston, Gnabro Ouakoubo

doi:10.3997/2214-4609.20148801

Cited by 16 publications

(12 citation statements)

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“…). In particular, there is a focus on applying DAS for reservoir monitoring with vertical seismic profiling (VSP) (Madsen, Parker, and Gaston ). A full‐day workshop was held on “Fibre Optics Sensing for Vertical Seismic Profile (VSP) Surveys” during the 2014 EAGE Conference.…”

Section: Introductionmentioning

confidence: 99%

“…DAS provides a less costly alternative to conventional seismic acquisition systems, and its use for seismic recording finds increasing attention (Gaston and Bostick 2011;Parker et al 2012;Hartog et al 2013). In particular, there is a focus on applying DAS for reservoir monitoring with vertical seismic profiling (VSP) (Madsen, Parker, and Gaston 2012). A fullday workshop was held on "Fibre Optics Sensing for Vertical Seismic Profile (VSP) Surveys" during the 2014 EAGE Conference.…”

Section: Introductionmentioning

confidence: 99%

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Interaction of helically wound fibre‐optic cables with plane seismic waves

Kuvshinov

2015

Geophysical Prospecting

167

101

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Distributed acoustic sensing is a novel technology for seismic acquisition. In this technology, strain changes induced by seismic waves impinging on an optical fibre are monitored. Due to the fact that glass is relatively rigid, straight glass fibres are not sensitive to broadside waves. We suggest using distributed acoustic sensing systems with fibres helically wound around cables. One increases the fibre sensitivity to broadside waves by decreasing the fibre wrapping angle (the angle between the fibre axis and the plane normal to the cable axis). The optimal wrapping angle is chosen to minimize the impact of Rayleigh waves on the signal measured. This angle depends on the cable Poisson ratio, and it is approximately equal to 30° for cables composed of plastic. For reliable detection of seismic waves, one needs a good mechanical contact between the cable and the surrounding medium. On the other hand, the sensitivity of distributed acoustic sensing systems to primary waves can be significantly reduced if the cable is placed in a cemented borehole.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction of helically wound fibre‐optic cables with plane seismic waves

Kuvshinov

2015

Geophysical Prospecting

167

101

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“…In recent years, fiber-optic DAS has become a new technology for acquiring borehole seismic data (Madsen et al, 2012;Mateeva et al, 2012). Its major advantages are low cost, ability to create large arrays and simplicity of deployment.…”

Section: Introductionmentioning

confidence: 99%

A permanent borehole fiber-optic distributed acoustic sensing experiment

Li¹,

Hornby²,

Konkler³

2013

SEG Technical Program Expanded Abstracts 2013

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We show an initial analysis of data from a permanent borehole fiber-optic Distributed Acoustic Sensing (DAS) and dedicated receiver experiment in Milne Point, Alaska. Results detail direct comparison of data from both fiberoptic DAS receivers and the z-component of actual geophones, all permanently cemented in a borehole, with a surface vibroseis source. We examine data amplitude, frequency, phase, noise and other practical issues. We also present quantitative comparisons of signal/noise for both dedicated and virtual DAS receivers as well as some thoughts on the way forward for the DAS technology.

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“…In the case of the borehole seismic application, the DVS permits a complete seismic profile of the well to be acquired in a single shot (impulsive source) or sweep (sweep-frequency source) and this improves the acquisition productivity considerably [25]- [27]. Nonetheless, the traditional electrical sensor arrays used for borehole seismic acquisition presently offer better signalto-noise ratio than the distributed optical techniques.…”

Section: Introductionmentioning

confidence: 99%

Fundamentals of Optical Fiber Sensing Schemes Based on Coherent Optical Time Domain Reflectometry: Signal Model Under Static Fiber Conditions

Лиокумович

Ushakov

Котов

et al. 2015

J. Lightwave Technol.

128

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The paper develops a statistical model for the signals received in phase-sensitive optical time domain reflectometry (OTDR) probed by highly coherent sources. The backscattering process is modelled by a set of discrete scatterers with properly chosen parameters. Explicit equations for calculating the amplitude and the phase of the backscattered signal are obtained. The developed model predicts spectral and autocorrelation characteristics of the amplitude signals that are validated by experimental results. Characteristics of the phase signals, practicable for studying the sensing applications of the OTDR system, are presented and studied as well, demonstrating good correspondence with experiment. A more detailed modelling of distributed vibration sensing systems and their response to disturbances along an optical fiber will be possible as an extension of the developed formalism. Index Terms-Optical fiber devices, optical fiber sensors, Rayleigh scattering, reflectometry, time domain analysis. 0733-8724

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A VSP Field Trial Using Distributed Acoustic Sensing in a Producing Well in the North Sea

Cited by 16 publications

References 0 publications

Interaction of helically wound fibre‐optic cables with plane seismic waves

Interaction of helically wound fibre‐optic cables with plane seismic waves

A permanent borehole fiber-optic distributed acoustic sensing experiment

Fundamentals of Optical Fiber Sensing Schemes Based on Coherent Optical Time Domain Reflectometry: Signal Model Under Static Fiber Conditions

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