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Effect of flood basalt stratigraphy on the phase of seismic waveforms recorded offshore Faroe Islands Juerg Schuler 1, Philip A. F. Christie2, and Robert S. White ABSTRACT The generation of short-period multiples between highly heterogeneous layers of basalt flows can strongly alter transmit-ted seismic wavefields. These layers filter and ...
Seismic refraction across the La Bajada Fault Yusliza Mohd Sufian UNIVERSITY OF TEXAS AT AUSTIN SAGE 2004 Outline Objectives Data processing Results Conclusions Objective To find layers deeper than the basalt layer (below 80 m depth) using the wide angle reflection method SAGE 2004 Seismic Line Data Processing Deconvolution Wide angle reflection method T2 vs. X2 method .
Abstract Imaging below the basalt for hydrocarbon exploration is a global problem because of poor penetration and significant loss of seismic energy due to scattering, attenuation, absorption and mode-conversion when the seismic waves encounter a highly heterogeneous and rugose basalt layer.
Integrated seismic and electromagnetic model building applied to improve subbasalt depth imaging ... hanced seismic data acquisition and processing or from other ... basalt layer, as well as the sediment and basement structures underneath.
A specific case, which is of great interest to petroleum exploration companies, occurs on continental shelf areas where potentially hydrocarbon-bearing strata are overlain by extensive extrusive igneous rocks. In this situation, standard seismic processing is often unable to resolve the structure beneath such basalt layers.
meters of basalt, rhyolite, and sediments of Cenozoic age. In some areas within the Snake River Plain, as much as 1 km of interbedded basalt and sediments lies on top of older, rhyolitic volcanic rocks (Walker, 1964). The basalt flows in the upper 150 m of the Snake River Plain are mostly compound pahoehoe flows, 3-to-5-m
gathers for processing facilitates the processing of the actual seismic data by allowing existing geological knowledge to complement data-driven velocity determinations. Introduction The sub basalt seismic imaging is problem in Krishna-Godavari basin. Event though the modalities of
Event-based sub-basalt imaging applied to marine seismic data from north of Shetland, UK. Norwegian Journal of Geology vol 88, pp 167-183. Trondheim 2008. ISSN 029-196X Seismic wave propagation in media with high-velocity layers (basalts) can be described as an interference of various events commonly referred to as wave types or modes.
Mar 16, 2018· Imaging below the basalt for hydrocarbon exploration is a global problem because of poor penetration and significant loss of seismic energy due to scattering, attenuation, absorption and mode-conversion when the seismic waves encounter a highly heterogeneous and rugose basalt layer. The conventional (short offset) seismic data acquisition, processing and modeling techniques adopted by .
This Technology is being widely used in Russia for 2D and 3D Seismic survey with a success to image beyond sub-Basalt layer." --70.74.212.240 16:55, 31 October 2011 (UTC) The photo titled thumper trucks is actually of a fleet of Vibroseis "buggies". Thumper trucks almost always act alone.
It is thus understandable that considerable time and effort is expended in any processing project on the final parameters of seismic display so as to satisfy the individual tastes of the interpreter. Such things as frequency content, gain, trace spacing, and type of display are all up for grabs (see "Displaying seismic .
Abstract: Sub-Salt and Sub-Basalt Imaging Using Long Offset and Multicomponent Seismic Data. Introduction Exploration in potential hydrocarbon producing areas beneath high-velocity layers (HVL) is typically hindered by a variety of seismic propagation effects. Dramatic elastic-impedance contrasts between the HVL and regional sedimentary ...
Processing and interpretation of reflection seismic data from a basalt-covered area Significant parts of the Norwegian Sea and adjacent northeast Atlantic Ocean have a basalt cover at shallow depth. In much of this area there are prospective petroleum resources both beneath and intercalated with the basalt.
Seismic properties of layer 2 basalts ... Daley et al., 2004], but seismic monitoring in basalt environments ... is more effectively used and behavior is more clearly linked to processing. A ...
Modern Sub-Basalt Seismic Imaging Figure 4: Successive cross-lines undertaken on the 3D over-under survey in the west-coast off India display numerous features under basalt such as the sag basin, fractures, faults and folding. K-T boundary layer is clearly seen as major change in frequency content.
Applications of finite-difference modelling to coal-scale seismic exploration Shaun Strong1,2, ... provides a meaningful simulation of the full sequence of seismic acquisition and processing (e.g. Strong and Hearn, 2008). ... undulations in the target seam were due to "pull-ups" from the overlaying basalt intrusions or were
around and within the basalts, it can be challenging for seismic processing to image the base of the basaltic layer and details of what is below. The Mesozoic in this area are mostly overlain by the Basalt flows of Late Cretaceous – Early Paleocene age,
A seismic line displayed in GEO ExPro caught the interest of a dedicated geologist as he spotted a pattern that resembled that of a major oil discovery he knew very well. His observation eventually led to Chevron's application in the Norwegian 20th licensing round for acreage that may include a large prospect along the North Atlantic Volcanic Margin.
Special seismic processing must be utilized to calculate attributes from prestack data, ... but al so layers of hyaloclastic rocks within basalt lava flows. These were deposited as debris fr om the cooling pillow lava flow. Due to their fragility and re-deposition processes, only .
In this paper we summarize the acquisition and processing of the multi-component seismic swath, and present observations on the integration of P- and S- waveform sonic logs with information from resistivity-based image logs to determine regional and local stress tensors and to improve identification of subsurface basalt lithofacies. 2. Seismic ...
Improving Seismic Data Quality by Reprocessing and Redesign of a 3D Survey in an Area of Chaotically-scattered Source-generated Noise ... the strength of the primary wavefield that transmits downwards through the layers of basalt is dramatically reduced due to the strong reflectivity of the basalt layers. ... He started processing in the early ...
Multifocusing Seismic Processing to Improve Poor Response Areas below Basalt Layers, Canadon Asfalto Basin, Argentina Conference Paper (PDF Available) · .
is05/08 seismic processing of HA04 seismic survey........................page 4 of 22 Section 1: Introduction The Hatton ...
2D Controlled Source Seismic Mapping Of The Low Velocity Layer In Magadi Basin, Kenya ... processing deep reflection seismic data. In Magadi basin, shallow seismic refraction or uphole survey has ... basalt layers of the Kirikiti platform are interbedded
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