Application of converted-wave 3D/3-C data for fracture detection in a deep tight-gas reservoir

Jianming, Tang; Huang, Yue; Xiang-rong, XU; Tinnin, John; Hallin, James

doi:10.1190/1.3167785

Cited by 34 publications

(8 citation statements)

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“…Shear-wave splitting has been used successfully to predict fracture density at reservoir level in the Xinchang field in China's western Sichuan Basin (Jianming et al, 2009). The success is especially remarkable because a brick-wall geometry was used with rather large station intervals of 50 m, suggesting even greater successes can be achieved with denser sampling and continuous shot lines.…”

Section: Shear-wave Splittingmentioning

confidence: 99%

“…In acquisition with MEMS sensors, a much larger receiver sampling interval is usually used. For instance, Jianming et al (2009) describe a 3D 3C acquisition in the Sichuan Basin, China, using 50-m station intervals. Obviously, this interval is much larger than the basic sampling interval.…”

Section: Single-point Acquisition Versus Array-based Acquisitionmentioning

confidence: 99%

“…Angerer et al (2006) discuss the use of a combined P-and PS-wave azimuthal anisotropy analysis using wide-azimuth OBC data. A successful fracturedetection and -orientation analysis using land 3D/3C data is reported by Jianming et al (2009). For an excellent overview of the 2009 status of PS-wave applications complemented with many references, see Stewart (2009).…”

Section: Introductionmentioning

confidence: 97%

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3D Seismic Survey Design, Second edition

Vermeer¹

2012

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Section: Shear-wave Splittingmentioning

confidence: 99%

Section: Single-point Acquisition Versus Array-based Acquisitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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3D Seismic Survey Design, Second edition

Vermeer¹

2012

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“…Chopra et al (2000) show how coherence attributes computed from azimuthally restricted seismic volumes can enhance subtle features hidden or blurred in the all-azimuth volume. Vector-tile and other migration-sorting techniques are now the method of choice for conventional P-wave and converted-wave prestack imaging (e.g., Jianming et al, 2009) and allow prediction of fracture strike and intensity.…”

Section: Applicationsmentioning

confidence: 99%

Observing fracture lineaments with Euler curvature

Chopra¹,

Marfurt

2014

The Leading Edge

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In the last several years, seismic-curvature attributes have been shown to be very useful in delineation of folds, flexures, and faults. Although many curvature measures have been introduced, the most-positive and most-negative principal curvatures (k 1 and k 2 ) are found to be the most useful. All other curvature measures can be derived from the two principal curvatures. For example, the components of apparent curvature projected parallel to the dip azimuth and strike of a dipping plane are useful in given tectonic and stress settings. Euler curvature is a generalization of the dip and strike components of curvature in any user-defined direction, as applied to the interpretation of surface-seismic data. This attribute is useful for interpretation of lineament features in desired azimuthal directions, for example, perpendicular to the minimum horizontal stress. If a given azimuth is known or hypothesized to be correlated with open fractures or if a given azimuth can be correlated with enhanced production or effective horizontal drilling, a Euler-curvature intensity volume can be generated for that azimuth, thereby highgrading potential sweet spots.Corresponding author: SChopra@arcis.com Figure 4. Stratal displays from Euler-curvature attribute volumes (long-wavelength) run at different strikes, as indicated. For each strike, the lineaments appear more well defined than those in other directions, and lineament detail on those individual displays is more pronounced than on the coherence display.

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“…For this reason, multilinear regression using AVAz and curvature can provide a better correlation. Jianming et al (2009) combined coherence, curvature, VVAz, and shear-wave splitting to form a risk-based prediction of natural fractures measured by image logs in Sichuan Basin, China. Working in an unconventional shale reservoirs, Thompsen et al (2011) correlated the location of microseismic events to curvature and VVAz attributes and curvature while Refunjol et al (2011) correlated microseismic events to curvature and hl-μl inversion volumes.…”

Section: T H a N N I V E R S A R Y T L Ementioning

confidence: 99%

Evolution of seismic interpretation during the last three decades

Chopra¹,

Marfurt

2012

The Leading Edge

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The ingredients of seismic interpretation include the right mix of geological and geophysical knowledge, together with a liberal dose of imagination, tempered with a considerable amount of patience. Seismic interpretation is a skill that one acquires with experience, but is constantly reinvigorated with new ideas and tools provided by younger university graduates. The prime ingredients for seismic interpretation are seismic reflection data coupled with a geologic depositional and tectonic model which together provide the framework for integrating borehole, microseismic, and production data resulting in a good reservoir model. Although commonly used in both engineering and environmental applications, most seismic reflection surveys are acquired for oil and gas exploration in both land and offshore areas around the world. Hydrocarbon accumulations are found at varying depths of a few thousand meters below the Earth's surface which are ultimately confirmed by drilling. Because the cost of drilling closely spaced wells can be prohibitively expensive, interpreted seismic data provide not only initial well locations in a wildcat environment, but also, when coupled statistically with production and well-log data, locations with higher probability of success in a resource play having hundreds of wells.

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Application of converted-wave 3D/3-C data for fracture detection in a deep tight-gas reservoir

Cited by 34 publications

References 0 publications

3D Seismic Survey Design, Second edition

3D Seismic Survey Design, Second edition

Observing fracture lineaments with Euler curvature

Evolution of seismic interpretation during the last three decades

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