Showing papers by "A. J. Berkhout published in 2011"
TL;DR: In this article, the authors focus on the concept of using blended data and multiple scattering directly in the migration process, meaning that the blended input data for the proposed migration algorithm includes blended surface-related multiples.
Abstract: This paper focuses on the concept of using blended data and multiple scattering directly in the migration process, meaning that the blended input data for the proposed migration algorithm includes blended surface-related multiples. It also means that both primary and multiple scattering contribute to the seismic image of the subsurface. Essential in our approach is that multiples are not included in the Green's functions but are part of the incident wavefields, utilizing the so-called double illumination property. We find that complex incident wavefields, such as blended primaries and/or blended multiples, require a reformulation of the imaging principle in order to provide broadband angle-dependent reflection properties.
131 citations
27 citations
14 citations
23 May 2011
TL;DR: In this paper, the authors proposed that the individual sources do not need to satisfy the same strong wide-band requirements and instead, they may be simpler, less expensive and easier to control.
Abstract: In traditional seismic surveys a single source (array) is used for each shot record. Therefore, it must transmit the full temporal frequency band. For example, a seismic vibrator and an airgun array are designed such that they have a large bandwidth. In general it is difficult and expensive to produce wideband sources. In addition, such designs are often a compromise. In blended acquisition, more sources are used than in a traditional acquisition. We propose that the individual sources do not need to satisfy the same strong wide-band requirements. Instead, they may be limited-bandwidth designs, which are simpler, less expensive and easier to control. With a multitude of narrow-band source elements, the blended incident wavefield at a particular subsurface gridpoint will contain the full temporal bandwidth. Because of the continuous growth in the number of sources and the number of recording channels, we expect that the future seismic acquisition will be robotized. In practice this means small autonomous source boats with single airguns of different sizes (marine) and autonomous single vibrators of different sizes (on land).
6 citations