Repeatability of sea bed multi‐component data

Ronen, Shuki; Waard, Ronald van; Keggin, J.

doi:10.1190/1.1820860

Cited by 13 publications

(6 citation statements)

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“…That concept is very different from the ideas behind crossequalization (Ross et al, 1996;Lumley, 1998, 2001). That concept is very different from the ideas behind crossequalization (Ross et al, 1996;Lumley, 1998, 2001).…”

Section: D Processing and Cross-equalizationmentioning

confidence: 93%

“…Barkved et al (2010) describe how application of FWI to improve imaging at Valhall results in a more consistent 4D response. However, using 2D and 3D sim-to-seis models and real 4D data, Routh et al (2012) demonstrate that broadband FWI can appropriately image the sub surface when the overburden changes and can recover high-resolution 4D anomalies. Queißer and Singh (2010) invert 2D lines extracted from 4D surveys acquired over the Sleipner Downloaded 09/30/15 to 129.78.139.28.…”

Section: Migration and Stacking Velocitiesmentioning

confidence: 96%

“…Repeatable receiver crossline positioning is usually easy to achieve with OBC, but inline positioning can be more challenging and depends on how accurately the first end of the cable is deployed (Ronen et al, 1999). However, with a little effort, oceanbottom cables can be placed relatively close to the baseline locations.…”

Section: Dedicated 4d Obs Acquisitionmentioning

confidence: 99%

“…The challenge to deriving an updated velocity model is that it can be hard to assess the length scales at which the velocities have changed between surveys (Routh et al, 2012). As a result, full-wavefield inversion (FWI) could be an ideal framework within which to address the issue of a changing overburden.…”

Section: Migration and Stacking Velocitiesmentioning

confidence: 99%

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Practical Applications of Time-lapse Seismic Data

Johnston

2013

127

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Section: D Processing and Cross-equalizationmentioning

confidence: 93%

Section: Migration and Stacking Velocitiesmentioning

confidence: 96%

Section: Dedicated 4d Obs Acquisitionmentioning

confidence: 99%

Section: Migration and Stacking Velocitiesmentioning

confidence: 99%

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Practical Applications of Time-lapse Seismic Data

Johnston

2013

127

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“…Risks associated with 4D seismic analysis include a difficulty in separating pressure and fluid saturation effects and misinterpretations between the desired reservoir properties and other effects (such as formation compaction and changes in surface conditions such as tidal and temperature effects). Since repeatability is an issue between different vintage seismic surveys (Ronen et al, 1999;Landrø et al, 2001;Eiken et al, 2003), Landrø (1999) profile (VSP) surveys by acquiring a 3D VSP survey over a period of two days. Shot locations were reoccupied at different times during the survey, and the recorded traces from those shots were analyzed.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2005

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A deviated borehole was drilled and completed to test systems for deployment of permanent in-well threecomponent fiber-optic seismic sensors. Two systems were developed and tested for deployment of these sensors. The first system involved using a passive mandrel device to enable coupling of the sensors simply using the weight of the tubing. The second system involved use of an active mandrel that incorporates a spring-loaded pad device to isolate the sensor from the tubing vibration. In addition, reference wireline vertical-seismic-profile data were acquired both in the empty cased borehole and through the tubing at the same location as the fiber optic sensor. Analysis of the data showed that best results were obtained using the active design. Tubing-related resonances were noted on data acquired using the passive design, whereas the active design did a good job of discriminating among these undesirable signals.

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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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Repeatability of sea bed multi‐component data

Cited by 13 publications

References 0 publications

Practical Applications of Time-lapse Seismic Data

Practical Applications of Time-lapse Seismic Data

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

Reservoir monitoring of steam‐assisted gravity drainage using borehole measurements

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