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The Application of the First Breaks Tomography Technique in the Seismic Exploration of the Coal Field

Author: SunHuangLi
Tutor: LiXinHu；ZhuFangXiang
School: Xi'an University of Science and Technology
Course: Geological Engineering
Keywords: Coalfield Seismic exploration Primary wave Velocity model Tomography Static correction
CLC: P631.4
Type: Master's thesis
Year: 2010
Downloads: 93
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Abstract


Seismic exploration area in the western coalfields mainly desert , Gobi , mountain , Loess Plateau as the main geomorphic units , these complex shallow surface the seismic geological conditions , the absorption of seismic waves in seismic exploration , the attenuation are extremely serious , and not clear the first wave the reflected signal is often \high-speed data acquisition layer excitation technique , the static correction problem in data processing have great significance . Complex surface structures for seismic exploration in the western coalfields in base seismic wave propagation of the basic principles , the first of the primary wave characteristics of the propagation of its type in the surface model analysis ; then briefly discusses the traveling wave earthquake early layer analysis of the basic principles of imaging and direct wave seismic refracted wave refraction and the beginning of its portfolio to wave tomographic inversion methods , precise strike the propagation velocity of the seismic waves in the underground medium speed arbitrary changes complex surface model . Finally, the comparative analysis of the seismic exploration of the mountains, the Gobi desert , the Loess Plateau area instance , the use of low speed with a survey with the early wave tomographic iterative inversion surface velocity modeling , the fine surface velocity model , application in the guidance field high-speed data acquisition layer excitation, so that to obtain high - quality raw data collected in the field ; application early wave travel time tomography static correction , the corrected stacked section seam continuity of the reflected wave , the signal-to-noise the correspondence between the high and constructed morphology and stratigraphic clearer, to improve the resolution and lay a good foundation for follow-up information on the imaging processing , seismic exploration results achieved in the complex surface .

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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