basalt layer seismic processing

Study on the limitations of travel-time inversion applied

basalt layer seismic processing Study on the limitations of travel-time inversion applied to sub-basalt imaging are poorly constrained by conventional processing and/or inversion schemes (Flecha et al., 2004). Velocity provides neous structure of the basalt layers scatter 100 the higher seismic frequencies of the source signal (Pujol and Smithson, 1991; Hobbs, 2002).

:Solid Earth · 2013:I Flecha · Ramon Carbonell · Richard W Hobbs: Spanish National Research Council · Durham University

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suggestion of a 2kmthick layer of volcanic ash overlying basalt beneath the sea floor south and . determinations normally agree with seismic data to within 5% CGG SubBasalt Imaging Zooming in around the top and base basalt (right) shows the clearer definition of this layer on the BroadSeis data.

Seismic imaging difficulty holding back Irish Atlantic

Sub-basalt imaging is often poor quality with the seismic data collected offering little information beneath the so-called "masking layer." Standard acquisition and bulk data processing parameters seem to do little to alleviate the problem.

basalt layer seismic processing executivefurniture

basalt layer seismic processing. A complex 3D volume for subbasalt imaging University College . model (pre and postbasalt sediment layers, sills, base ment) has been filled according to the geological model derived from the seismic field data and to match .

Seeing below the basalt – offshore Faroes Gallagher


basalt layer seismic processing This thick basalt layer obscures the deeper potentially prospective sedimentary section. Research has shown that basalt layers scatter the higher seismic frequencies (Pujol and Smithson 1991; Hobbs 2002) and deep towing of receiver cables can extend the seismic bandwidth towards lower frequencies (Ziolkowski et al. 2002).

:Geophysical Prospecting · 2007:Joseph W Gallagher · Peter W Dromgoole: Statoil:Hydrogeology · Tectonics · Gemology · Geochemistry · Glaciology · Economic geology

2D and 3D Land Seismic Data Acquisition | Reflection

This is to certify that Mr. Kiran Kumar Talagapu, a final year student of M. Sc. (Tech.) Geophysics, Department of Geophysics, Andhra University, Waltair, Visakhapatnam has participated in the project work "2-Dimensional and 3Dimensional Land Seismic Data Acquisition and Seismic Data Processing" from 10th December 2004 to 31st January 2005, at Oil and Natural Gas Corporation (ONGC) Chennai.

Seismic processing and imaging Science & Engineering

Seismic processing and imaging Reservoir imaging under complex overburden and virtualsource imaging. Technologies have been developed over the years to understand how fluid flows through reservoirs during production.

Advances in seismic imaging through basalts: a case study

using conventional seismic acquisition and processing methods as a consequence of three major effects caused by the layered basalt flows: (i) strong scattering of the seismic wavefield; (ii)

:Petroleum Geoscience · 2005:Roman Spitzer · Robert S White · Isimm Team: University of Cambridge:Geomorphology · Environmental geology · Mineralogy · Engineering geology · Frequenc…

Sub-basalt Multiple and Noise Suppression Using a Dense

basalt usually gives rise to a strong reflection coefficient at top basalt and hence strong multiples. Seabed multiples and interbed multiples between top basalt and the seabed may compound the complexity of the multiple energy. The basalt „layer‟ may contain multiple flows with erosion and sedimentation occurring between the flows.

Multifocusing Seismic Processing to Improve Poor Response

basalt layer seismic processing The MF processing allowed the interpreter to generate a new hydrocarbon play concept for the early rift basin fill. It provided essential support to outline and mature a drillable exploration prospect.

:D Curia · P C H Veeken · J Zunino · K Deev · D Pelman:Volcanism · Geology · Telmatology · Geobiology · Geomorphology · Petrology

Use of low-frequency signals to improve imaging quality

basalt layer seismic processing layer below the basalt and seismic frequency in order to understand the ability of seismic signals with different frequencies to penetrate the screening high-velocity

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Integrated wide-angle and near Seismic Equipment

basalt layer seismic processing large-aperture seismic data from the FaeroeŒShetland region geometry and subsequent processing yielded shot gathers that wecallsupergathers,withanoffsetrangeof0.2to38.2km(e.g., The model incorporates a 1.5-km-thick basalt layer overlying a 3.5-km …

Seismic Research Papers

—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.

Seismic imaging difficulty holding back Irish Atlantic

Sub-basalt imaging is often poor quality with the seismic data collected offering little information beneath the so-called "masking layer." Standard acquisition and bulk data processing parameters seem to do little to alleviate the problem.

Abstract: Sub-Salt and Sub-Basalt Imaging Using Long

basalt layer seismic processing 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.

Deep Downhole Seismic Testing for Earthquake Engineering

basalt layer seismic processing interbeds and basalt layers ranging in thicknesses from about 7 to 30 m and 30 to 60 m, respectively. The wave velocities of the basalt layers are about two to …

:Kenneth H Stokoe · Song Cheng Li · Brady R Cox · Farnyuh Menq · Alan C Rohay:Earthquake engineering · Signal-to-noise ratio · Environmental science · Shear waves

Seismic challenges in high impact Lower Tertiary

Seismic imagings of prospective reservoir targets in the region have been problematic due to extensive Tertiary basalt. The basin lies in water depths ranging from approximately 200 m (656 ft) to more than 1,000 m (3,281 ft) and is divided into both UK and Faroe offshore territories, with the Faroe area covered in a thick layer of basalt.

Sub-basalt imaging problems and the application of


basalt layer seismic processing We vary basalt layer thickness and source frequency to generate a synthetic model that produces seismic that is similar to real sub-basalt seismic, i.e. high amplitude top basalt reflector and the absence of base basalt and sub-basalt events.


to use standard offset seismic datasets for sub-basalt imaging (Ogilvie et al., 2001), the waveFigure 1: Original data without pre-processing: brute stack after NMO and AGC. The water-layer peg-leg multiples from TB (top basalt) and BB (base basalt) are quite strong. Multiple patterns are divided into three CDP intervals (ranges A-C).

Modern Sub-Basalt Seismic Imaging Deepwater Realm

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.

Sub-basalt seismic imaging using optical-to-acoustic model


The presence of highly heterogeneous basalt layers has a detrimental effect on seismic imaging of underlying structures. Due to the prevalence of basalt, the challenge of imaging below basalts impinges on a broad spectrum of geological problems, from hydrocarbon exploration to volcano seismology.

Issues in processing seismic data from complex areas CSEG

layer are similar to those of imaging beneath basalt and have not yet been satisfactorily resolved for seismic methods (Ziolkowski et al., 2001). The survey comprised 139 shots spaced nominally at 72 m.

Talk:Seismic source Wikipedia

basalt layer seismic processing Talk:Seismic source. Jump to navigation Jump to search This Technology is being widely used in Russia for 2D and 3D Seismic survey with a success to image beyond sub-Basalt layer." -- 16:55, 31 October 2011 or if there is a seismic processing or signal processing page that already covers it.

Event-based sub-basalt depth imaging applied to marine

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.