نتایج جستجو برای: seismic velocity modeling

تعداد نتایج: 555303  

2012
Sara L. Dougherty Robert W. Clayton Don V. Helmberger

[1] The fine-scale seismic structure of the central Mexico subduction zone is studied using moderate-sized (M4-6) intraslab earthquakes. Regional waveforms from the Mapping the Rivera Subduction Zone (MARS) seismic array are complicated and contain detailed information about the subduction zone structure, including evidence of lateral heterogeneity. This waveform information is used to model th...

2004
Dheeraj Bhardwaj Jeremy Cohen Steve McGough Steven Newhouse

Seismic modeling is an integral part of the seismic data processing for oil and gas exploration, as it provides us the seismic response for a given earth model. Grid enabled seismic wave modeling can facilitate users in the area of geophysics to calculate synthetic seismograms using federated HPC resources and complex solution algorithms without knowing their complexities. The present paper is ...

1999
MICHAEL L. BATZLE

Seismic techniques for direct hydrocarbon indication rely on the changes in seismic character which accompany changes in pore fluid content. Interpretation and modeling of direct hydrocarbon indicators (DHIs) require an understanding of the factors affecting seismic velocities and reflection coefficients which are, in turn, dependent on pore fluid properties, rock frame properties, and fluid su...

2009
Matthew M. Haney Kasper van Wijk Leiph A. Preston David F. Aldridge

s). “Quantitative estimation of compaction and velocity changes using 4D impedance and traveltime changes” by Landro and Stammeijer (Geophysics, 2004). “Observations and analysis of B-type earthquakes, explosions, and volcanic tremor at Pavlof volcano, Alaska” by McNutt (Bulletin of the Seismological Society of America, 1986). “Coda wave interferometric detection of seismic velocity changes ass...

2014
OMID AHMADI

Ahmadi, O. 2015. Application of the Seismic Reflection Method in Mineral Exploration and Crustal Imaging. Contributions to Hardrock Seismic Imaging. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1269. 76 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9290-8. The seismic reflection method has been used extensively in mineral exp...

2003
Robert Will

This paper proposes a method for quantitative integration of seismic (elastic) anisotropy attributes with reservoir performance data as an aid in characterization of systems of natural fractures in hydrocarbon reservoirs. This method is demonstrated through application to history matching of reservoir performance using synthetic test cases. Discrete Feature Network (DFN) modeling (Dershowitz et...

Journal: :فیزیک زمین و فضا 0
نوید امینی گروه فیزیک زمین، موسسه ژئوفیزیک دانشگاه تهران عبدالرحیم جواهریان دانشکده مهندسی نفت، دانشگاه صنعتی امیرکبیر، تهران

seismic tomography is an imaging technique which creates maps of subsurface elastic properties such as p/s wave velocity, density and attenuation, based on observed seismograms and use of sophisticated inversion algorithms. amongst different acquisition geometries, seismic cross-hole tomography has a special position in geophysical surveys with many applications in hydrocarbons, coal and other ...

2012
Michael Gurnis

A model of thermoelastic properties for a chemically homogeneous adiabatic lower mantle is calculated. Constraints provided by this model are used in convection models to study dynamics of a chemically distinct layer at the bottom of the mantle. We find that the layer must be at least 2% denser than the overlying mantle to survive for a geologically significant period of time. Realistic decreas...

2012
José Federico Ramírez-Cruz Olac Fuentes Rodrigo A. Romero Aaron Velasco

We present a hybrid method to produce a velocity model of the Earth’s crust using evolutionary and seismic tomography algorithms. This method takes advantage of the global search ability of an evolution strategy and the quick convergence of an iterative three-dimensional seismic tomography technique to generate a model of the Earth’s crustal structure from recorded arrival times of wave fronts ...

2008
Maria Cameron Sergey Fomel James Sethian

The objective of this work is to build an efficient algorithm (a) to estimate seismic velocity from time-migration velocity, and (b) to convert time-migrated images to depth. We establish theoretical relations between the time-migration velocity and the seismic velocity in 1 Page 1 of 23 GEOPHYSICS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 3...

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