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Keywords: acquisition
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3418412
... source separation robust radon operator reservoir characterization seg international exposition sacchi iteration upstream oil & gas expanded abstract exploration geophysicist 10 artificial intelligence radon transform radon coefficient noise acquisition radon operator simultaneous...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3399306
... Acquisition of incomplete data, i.e., blended, sparsely-sampled and narrowband data, is an attractive strategy, provided that the recovery of complete data, i.e., deblended, well-sampled and broadband data, is attainable. In this paper, we propose a machine-learning (ML) based scheme...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3400856
... geophysicist 10 acquisition reservoir characterization imaging velocity model fwi subsalt imaging shen seg international exposition case study upstream oil & gas mexico streamer data full-waveform inversion gulf complex salt environment The impact of full-waveform inversion for imaging...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3409644
... High-density seismic acquisition technique shows good effects on solving exploration problems such as exploration in low signal-to-noise ratio region, imaging of complex geological bodies, lithological exploration and fine reservoir description and monitoring. The technique has become one...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424845
... Marchenko method is a novel approach to obtain multiple-free imaging and has the potential to image the targeted area below the overburden. However, Marchenko method requires highdensity seismic data, which significantly increases the acquisition cost. Obtaining accurate Marchenko imaging...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425103
... oil & gas exploration geophysicist 10 extension convex acquisition reconstruction correction receiver-extension approach ludovic métivier gradient A receiver-extension approach to robust full waveform inversion Ludovic Me´tivier , Univ. Grenoble Alpes, CNRS, LJK and Romain Brossier...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428390
... Ocean Bottom Node (OBN) data can be acquired using blended acquisition or simultaneous shooting that allows temporal overlap among different sources. A higher blending ratio can help reduce the acquisition cost more, but also poses more challenges in separating the signal from the blending noise...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427880
... acquisition provides enough information for a reliable inversion with FWI. This velocity model can then be paired with conventional NATS data to yield an image with more accurate positioning of subsurface structures. Moreover, the sparse node data itself can also be used for imaging; we demonstrated...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427882
... Achieving desirable receiver sampling in ocean bottom acquisition is often not possible because of cost considerations. Assuming adequate source sampling is available, which is achievable by virtue of reciprocity and the use of modern randomized (simultaneous-source) marine acquisition...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3416226
... particularly full waveform inversion (FWI). The presence of surface obstructions such as production platforms, made wide azimuth (WAZ) towed streamer acquisition impossible. Seabed nodes offered the obvious solution. To ensure an optimum illumination of the target and yet economically viable project...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428063
... Ultra-long offset seabed acquisitions implemented with sparse array of ocean bottom nodes (OBN) are emerging as the goto strategy for velocity model building. These stationaryrecording geometries provide the flexibility to record a plethora of wave arrivals and in particular diving waves...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428163
... reservoir characterization initial model geometry new acquisition upstream oil & gas the overburden exploration geophysicist 10 seismic image modeling experiment suez velocity model gulf modeling study subsurface challenge final model seismic data experiment seg...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427554
... acquisition project in 2019. The multiazimuth acquisition solution featured latest advances in towed streamer technology including variable streamer lengths and wide tow sources. The survey delivered improved near-offset sampling, higher trace density, denser spatial sampling, and larger azimuthal coverage...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427586
.... Presentation Date: Tuesday, October 13, 2020 Session Start Time: 1:50 PM Presentation Time: 3:30 PM Location: 361F Presentation Type: Oral reservoir characterization vintage acquisition shetland basin seg international exposition complex geology reflection fwi exploration geophysicist 10...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427655
... multiples interfering with the primaries prevent creating a good reservoir image. In ocean-bottom seismic (OBS) acquisition, sources are near the surface while the receivers are deployed at the seafloor, giving two different datum in the process. This dual-datum poses a problem to using surface-related...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425439
... Imaging subsalt and pre-salt oil reservoirs requires seismic acquisition that could provide the azimuths and offsets necessary to illuminate under a complex overburden and to generate an accurate velocity model. Herein, we discuss an acquisition method that allows us to acquire wide-azimuth...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426703
... geophysicist 10 acquisition upstream oil & gas maximum semblance semblance maximum semblance pick parameter field CRS imaging through dynamic warping based automatic semblance pick A case study Chandan Kumar* and John Etgen, BP Summary Method The CRS stacking operator is based on three wavefront...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426734
... fault block development and complex contact relationship, through wave forward modeling, it is confirmed that the accuracy of shallow surface velocity field is the main factor affecting the imaging accuracy of deep structure, and a high-density 3D seismic acquisition method is designed to improve...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428312
... and acquisition to processing and interpretation. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 2:40 PM Location: 362D Presentation Type: Oral reservoir characterization expanded abstract exploration geophysicist 10 vintage das vsp upstream oil...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425937
..., October 13, 2020 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: Poster Station 9 Presentation Type: Poster reservoir characterization blended data exploration geophysicist 10 sparse inversion non-production shot shot time interval noise acquisition deblending upstream...

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