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The SeisAble Benefits of CGG technologies and services are regularly featured in the industry press. Find out more by consulting our e-library of published industry articles. Narrow your search by entering at least one search criterion:

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Results: 142

Increasing the accuracy of microseismic monitoring using surface patch arrays and a novel processing approachIncreasing the accuracy of microseismic monitoring using surface patch arrays and a novel processing approach
First Break, July, 2014
Estelle Rebel | Jelena Kostadinovic | Thomas Bardainne | Malgorzata Chmiel
Summary
In this paper, we present a novel acquisition technique to further decrease the noise recorded at the surface of the Earth when monitoring hydraulic stimulation. We argue that the wellhead is not the only source of noise in such cases; it is in fact one of the less important ones. Based on this observation, and building upon recent advances in seismic acquisition, we have developed a practical and highly efficient acquisition design, namely a patch array approach. It offers a wide variety of noise cancellation methods while remaining easy to deploy in the field. In addition, we have developed a suite of processing schemes (Macault and Bardainne, 2014; Chmiel and Bardainne, 2014) that take full advantage of the patch array design. We will present them herein, and demonstrate the benefits of such processing techniques within a case study.
Experiencing the full bandwidth of energy from exploration to production with the Art of BroadSeis  Experiencing the full bandwidth of energy from exploration to production with the Art of BroadSeis
First Break, June, 2014
Jo Firth | Idar Horstad | Menne Schakel
Summary
The exceptionally broad bandwidth of over 6 octaves delivered by BroadSeis variable depth streamers, in combination with a BroadSource multi-level broadband source, not only provides unprecedented information about the subsurface, but also produces stunning images. In particular, the additional high signal-to-noise ratios at low frequencies, down to 2.5 Hz, provide extra ?texture? as these provide an envelope to the seismic signal which shapes the larger scale impedance variations, to deliver clear distinction between stratigraphic packages (see figure 1). This full bandwidth has been exploited in many areas of the world to reduce exploration risk, improve development plans and maximize return on investment.
Exploring the Mid North Sea HighExploring the Mid North Sea High
Geo Expro, May, 2014
Gregor Duval | Matthew Dack
Summary
The Mid North Sea High is one of the last remaining underexplored areas of the UKCS. Away from the main Kimmeridge Clay source rock kitchen it is believed that a Carboniferous petroleum system could be in place but it has not yet been made evident by successful drilling. Supporting the exploration efforts in this region, CGG has acquired a new broadband marine seismic survey over the southern parts of Quadrants 29 and 30, where until now only 2D seismic data have been accessible. This 3D dataset is therefore the first of its kind in this area. It covers approximately 5,600 km2 around and south of the Auk field and it has already revealed some interesting geological features which help to better understand the geology of the Mid North Sea High.
Improvement of the reservoir characterization of fluvial sandstones with geostatistical inversion in Golfo San Jorge Basin, ArgentinaImprovement of the reservoir characterization of fluvial sandstones with geostatistical inversion in Golfo San Jorge Basin, Argentina
Leading Edge, May, 2014
Alberto Sabate | Inna Tsybulkina | Francisco Morillo
Summary
In the Golfo San Jorge Basin, Argentina, the main traditional reservoirs are fluvial sandstones, which are thin and usually fall below seismic tuning frequency. The need for an aggressive development of the reserves and the need to open new areas led to a pilot job in a zone of approximately 100 km2, assuming the possibility to go vertically across structural and stratigraphic traps and their combination, using high technology added to the proved workflow. After the carefully traditional seismic structural interpretation of faults and horizons in the area and using seismic attributes, the seismic reservoir characterization was aimed toward the processing and analysis of a seismic geostatistical inversion.
First production application of high-density vibroseis acquisition on Alaska?s North SlopeFirst production application of high-density vibroseis acquisition on Alaska?s North Slope
Leading Edge, May, 2014
Olivier Winter | Peter Maxwell | Ron Schmid | Howard Watt | Eric Bathellier
Summary
A case study of the acquisition of a high-density, broadbandwidth vibroseis survey on Alaska?s North Slope, using a high-productivity slip-sweep technique, shows the merits of this technique for acquisition of high-density data in a short time frame in extreme conditions as well as the benefits of high-density broadband data for subsequent processing, imaging, and seismic inversion.
Shale Science AllianceShale Science Alliance
Oilfield Technology, May, 2014
Neil Peake
Summary
Neil Peake, CGG, and Bill Whatley, Baker Hughes, explain how combining the reservoir description services of Baker Hughes and the geoscience capabilities of CGG offers improved understanding of how to optimize reservoir development.
Seabed permanent reservoir monitoring (PRM) - a valid 4D seismic technology for fields in the North SeaSeabed permanent reservoir monitoring (PRM) - a valid 4D seismic technology for fields in the North Sea
First Break, May, 2014
malcom lansley
Summary
Morten Eriksrud demonstrates the advantages of PRM using 4D technology, such as a significant uplift in image quality, and how this is leading to a broadening market for this technology in the North Sea.
Broadband Seismic Technology and Beyond Part IX: BroadSeis in ProductionBroadband Seismic Technology and Beyond Part IX: BroadSeis in Production
Geo Expro, May, 2014
Vetle Vinje | Jo Firth
Summary
In the last edition of GEO ExPro we described how the broad bandwidths delivered by the innovative BroadSeis technology benefit exploration. In this second part, the advantages of an extended bandwidth to field development and reservoir characterisation are examined. The high frequencies provide highresolution near-surface images for geohazard identification and also enable detailed velocity modelling which can provide better deeper images. However, in many respects it is the low frequency end of the spectrum which is more important as these frequencies provide more quantitative and reliable reservoir inversion results, simplified interpretation and clearer facies discrimination.
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