Field test of a permanent in-well fiber-optic seismic system

Hornby, Brian E.; Bostick, F. X.; Williams, Brock A; Lewis, Kristen A.; Garossino, Paul

doi:10.1190/1.1993709

Cited by 26 publications

(3 citation statements)

References 10 publications

(11 reference statements)

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“…In order to enhance the repeatability on the receiver side of 3D VSP acquisitions, especially over longer periods of time, permanently installed geophone arrays are considered to be the most adequate (Landrø ; Hornby et al . ).…”

Section: D Vertical Seismic Profilingmentioning

confidence: 97%

Reservoir monitoring of steam‐assisted gravity drainage using borehole measurements

Tøndel

Schütt

Dümmong

et al. 2014

Geophysical Prospecting

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This paper presents the results from a research project focusing on permanent cross‐well geophysical methods for reservoir monitoring during steam‐assisted gravity drainage. A feasibility study indicated detectable differences in seismic and electrical reservoir properties based on expected changes in temperature and fluid saturation during the production of extra heavy oil. As a result of this, a permanent cross‐well system was installed at the Leismer Demonstration Area, located in the Athabasca Oil Sands region in Alberta, Canada. Baseline data sets, including cross‐well seismic, three‐dimensional vertical seismic profiling and cross‐well electrical resistivity tomography, have been acquired. Comparisons between conventional surface seismic and downhole seismic data show an increase in resolution and frequency content as expected. Steam‐assisted gravity drainage‐induced time‐lapse effects are clearly visible in the 3D vertical seismic profiling and electrical resistivity tomography data sets, even after a few months of oil production. In general, the 3D vertical seismic profiling images show a higher resolution than the surface seismic data, in particular when dealing with vertical positioning of the time‐lapse events. The electrical resistivity tomography baseline shows clear separation between zones of high and low electrical resistivity, and during 23 months of electrical resistivity tomography measurements the maximum reduction of resistivity is 85%. Time‐lapse observations from acoustic and electrical borehole data correspond well, and are also supported by temperature measurements in the two observation wells. Emerging technologies, updated models, improved flexibility, and reduced costs will allow future reservoir monitoring with surface and borehole data in combination, or even with borehole data exclusively.

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Section: D Vertical Seismic Profilingmentioning

confidence: 97%

Reservoir monitoring of steam‐assisted gravity drainage using borehole measurements

Tøndel

Schütt

Dümmong

et al. 2014

Geophysical Prospecting

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“…This system is reportedly being adapted for borehole deployment. Other systems are Clarion sensor array developed by Weatherford [6], and the FOSVS sensor array developed by Paulsson Inc. [7]. This system appears to be similar to the early prototype of the "Alpha" sensor , both with respect to size and the use of Fiber Bragg Gratings (FBGs).…”

Section: Fiber-optic Accelerometersmentioning

confidence: 99%

Enabling persistent monitoring of littoral areas with smart unmanned assets

Haldorsen¹,

Christensen

Metzbower

et al. 2023

Ocean Sensing and Monitoring XV

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Recent incidences of sabotage of Oil & Gas pipelines in the Baltic Sea have made it clear that sub-sea pipelines are vulnerable and will require surveillance for protection.Harbors and ports are noisy. Pressure measurements from hydrophones allow only measurements of signal arrival times. With only this information, a dense, spatially-dispersed sensor array is required for detection and localization. Using vector sensors allow additional estimation of direction of propagation at each measurement point, allowing separating signals from multiple sources. A smaller number of vector sensors can replace a larger number of scalar pressure sensors. Static sea-floor deployment of the sensor array, allows accurate mapping after deployment, reducing inaccuracies in sensor locations found in mobile systems.We describe a method that allows using multi-component sea-floor sensors to identify and track any source of acoustic energy even when the orientations of the multi-component sensors are unknown. Sources that satisfy certain simple assumptions can be used to find the absolute orientation of the multi-component sensors. The methodology allows using a simplified sensor array where a short-interval fiber-optic DAS array is combined with a sparse array of twocomponent, transverse-only, point sensors. We describe optical multi-component accelerometers, that are easily combinable with DAS sensor arrays. Without electronics, there is no need for power -and the risk of failure of electronics left for a long period of time is eliminated, significantly increasing the lifetime of the installation. The acquisition system for the hybrid optical array will be simpler and enable "always-on" monitoring.

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“…However, the complexity of structure necessitates higher technology in the data acquisition and processing. Singh, et al, 1996al., 1996al Moldoveanu, et al, 2007 Maas, et al, 2004Hornby, et al, 2004Hornby, et al et al, 2005Thompson, et al, 2005Thompson, et al et al, 2006et al Keul, et al, 2005 et al Shindo, et al, 2001Shindo, et al, . et al, 2001 .…”

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confidence: 99%

The latest tendency in development of exploration geophysics-Importance of spatiotemporal scales-

Mikada¹

2008

J. JAPANESE. ASSOC. PETROL. TECHNOL.

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Geophysical exploration technologies have been developed through several innovative steps in the history. Data acquisition and processing technologies evolved since 1960s. Since 1980s, these technologies started to be integrated fi rst to reservoir description, then to reservoir modeling characterization , and recently to reservoir management technologies. These developments have taken place due to the recent tendency to have their target structures in smaller scale or more complex than it used to be. We may summarize these technical developments as follows a 3D to 4D data acquisition to realize reservoir management, b 4-C marine data acquisition tri-component geophone and pressure gauge , c single sensor acquisition supported by well-developed multi-channel signal processing techniques for true amplitude recovery without any instrumental spatial fi ltering, d new acquisition technologies such as fi ber-optic sensor arrays. We believe that further new development would surely be attempted to satisfy the needs to visualize underground structure, to understand what is on-going for the state of natural resources under development, and to enhance our management capabilities to control the production from existing reservoir.

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Field test of a permanent in-well fiber-optic seismic system

Cited by 26 publications

References 10 publications

Reservoir monitoring of steam‐assisted gravity drainage using borehole measurements

Reservoir monitoring of steam‐assisted gravity drainage using borehole measurements

Enabling persistent monitoring of littoral areas with smart unmanned assets

The latest tendency in development of exploration geophysics-Importance of spatiotemporal scales-

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