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Revelo Obando, B.A. (author), Blacquière, G. (author)
The ultimate goal in survey design is to obtain the acquisition parameters that enable acquiring the most affordable data that fulfills certain image quality requirements. We propose a method that allows optimization of the receiver geometry for a fixed source distribution. The former is parameterized with a receiver density function that...
journal article 2023
document
Xue, Tong (author), El Ali, Abdallah (author), Viola, Irene (author), Ding, Gangyi (author), Cesar, Pablo (author)
Watching HMD-based 360° video has become in-creasing popular as a medium for immersive viewing of photo-realistic content. To evaluate subjective video quality, researchers typically prompt users to provide an overall Quality of Experience (QoE) score after viewing a stimulus. However, since users can adjust their viewport throughout a 360°...
conference paper 2022
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Brodic, Bojan (author), Ras, Paul (author), Kunder, Richard de (author), Drijkoningen, G.G. (author), Malehmir, Alireza (author)
Seismic imaging characteristics of a prototype electrically driven, linear synchronous motor-based, vertical-force seismic vibrator ("e-vib") were evaluated at a site in the Netherlands. The system weighs 1.65 t and excites seismic signals with a peak force of 6.7 kN. Data were recorded along two collocated geophone-based nodal and...
review 2021
document
Nakayama, Shotaro (author), Blacquière, G. (author)
Acquisition of incomplete data, i.e., blended, sparsely sampled, and narrowband data, allows for cost-effective and efficient field seismic operations. This strategy becomes technically acceptable, provided that a satisfactory recovery of the complete data, i.e., deblended, well-sampled, and broadband data, is attainable. Hence, we explore a...
journal article 2021
document
Ishiyama, Tomohide (author), Ali, Mohammed (author), Blacquière, G. (author), Nakayama, S. (author)
We introduce a blended-acquisition method: temporally signatured and/or modulated and spatially dispersed source array, namely S-/M-DSA. The former S-DSA has much less constraints in the encoding with operational flexibility, allowing non-uniform sampling and non-patterned shooting both in the space and time dimension. The latter M-DSA allows...
conference paper 2019
document
Blacquière, G. (author), Nakayama, S. (author)
Acquisition geometry design aims at finding the most affordable acquisition geometry that satisfies the objectives of the seismic survey. The parameters of an acquisition geometry can be specified in terms of the number of sources and detectors, their location, the blending parameters and the DSA (dispersed source array) parameters. In our...
conference paper 2019
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Noorlandt, R.P. (author), Drijkoningen, G.G. (author), Dams, J. (author), Jenneskens, R. (author)
A linear synchronous motor (LSM) is an electric motor that can produce large controllable forces and is therefore suitable as a driving engine for a seismic vibrator. This motor consists of two independent elements, a magnet track and a coil track, allowing practically unlimited motor displacements. This makes the LSM very suitable for expanding...
journal article 2015
document
Kumar, A. (author), Blacquiere, G. (author), Verschuur, D.J. (author)
Recent advances in survey design have led to conventional common-midpoint-based analysis being replaced by the subsurface-based seismic acquisition analysis and design, with the emphasis on advance techniques of illumination analysis. Amongst them are wave-equation-based seismic illumination analyses such as the so-called focal beam method. The...
conference paper 2014
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Kumar, A. (author), Blacquière, G. (author)
A subsurface image obtained from seismic data is influenced by the acquisition geometry, as it contains an acquisition foot-print which can obscure the true reflection response of the subsurface. Hence, the acquisition geometry should be designed in such a way that it allows high-quality images and fulfils the criteria for reservoir...
journal article 2013
document
Berkhout, A.J. (author), Blacquière, G. (author)
We show that deblended shot records have a better background-related S/N than shot records in unblended surveys. This improvement increases with increasing blending fold and decreasing survey time. An interesting consequence of this property is that blended surveys can be carried out under more severe noise conditions than unblended surveys. It...
journal article 2013
document
Soni, A.K. (author), Verschuur, D.J. (author)
Blended source and/or simultaneous source acquisition for multi-offset and multi-azimuth VSP measurements can prove significantly beneficial in saving expensive borehole down-time. In the last few years, for the case of surface seismic data, it was proposed to redefine imaging and inversion of the blended data to handle the data directly without...
journal article 2013
document
Verschuur, D.J. (author)
Today, the problem of surface-related multiples, especially in shallow water, is not fully solved. Although surface-related multiple elimination (SRME) method has proved to be successful on a large number of data cases, the involved adaptive subtraction acts as a weak link in this methodology, where primaries can be distorted due to their...
journal article 2013
document
Berkhout, A.J. (author), Blacquière, G. (author)
If simultaneous shooting is carried out by incoherent source arrays, being the condition of blended acquisition, the deblending process generates shot records with a very low residual interference (blending noise). We found, theoretically and numerically, that deblended shot records had a better background-related signal-to-noise ratio than shot...
journal article 2013
document
Van Borselen, R.G. (author), Fokkema, J.T. (author), Van den Berg, P.M. (author)
In marine seismic acquisition, the free surface generates seismic events in our recorded data that are often categorized as noise because these events do not contain independent information about the subsurface geology. Ghost events are considered as such noise because these events are generated when the energy generated by the seismic source,...
journal article 2013
document
Blacquière, G. (author), Berkhout, A.J. (author)
The amount of sources and detectors in the seismic method follows "Moore’s Law of seismic data acquisition", i.e., it increases approximately by a factor of 10 every 10 years. Therefore automation is unavoidable, leading to robotization of seismic data acquisition. Recently, we introduced a new source concept that replaces today’s complex, local...
journal article 2013
document
Berkhout, A.J. (author)
The concept of blending and deblending is reviewed, making use of traditional and dispersed source arrays. The network concept of distributed blended acquisition is introduced. A million-trace robot system is proposed, illustrating that decentralization may bring about a revolution in the way we acquire seismic data in the future.
journal article 2013
document
Mahdad, A. (author)
Seismic imaging is one of the most common geophysical techniques for hydrocarbon exploration. Seismic acquisition is a trade-off between economy and quality. In conventional acquisition, the time intervals between successively firing sources are large enough to avoid interference in time. To obtain an efficient survey, the spatial source...
doctoral thesis 2012
document
Berkhout, A.J. (author)
Blended source arrays are historically configured with equal source units, such as broadband vibrators (land) and broadband air-gun arrays (marine). I refer to this concept as homogeneous blending. I have proposed to extend the blending concept to inhomogeneous blending, meaning that a blended source array consists of different source units....
journal article 2012
document
Wapenaar, C.P.A. (author), Van der Neut, J.R. (author), Thorbecke, J.W. (author)
Deblending of simultaneous-source data is usually considered to be an underdetermined inverse problem, which can be solved by an iterative procedure, assuming additional constraints like sparsity and coherency. By exploiting the fact that seismic data are spatially band-limited, deblending of densely sampled sources can be carried out as a...
journal article 2012
document
Wei, W. (author), Fu, L. (author), Blacquiere, G. (author)
A method for the efficient computation of multifrequency focal beams for 3D seismic acquisition geometry analysis has been developed. By computing them for all the frequency components of seismic data, single-frequency focal beams can be extended to multifrequency focal beams. However, this straightforward method involves considerable computer...
journal article 2012
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