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Key Technology Research of Block Modeling in Seismic Imaging System

Author: ChuJian
Tutor: WeiZhiQiang
School: Ocean University of China
Course: Computer Software and Theory
Keywords: Block modeling Delaunay triangulation / tetrahedralization Geological Surface Intersection With the right geological surface extension Conforming Delaunay Triangulation
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract


Tremendous progress in the field of seismic imaging is the main driving force to promote the rapid development of the oil exploration industry. Seismic imaging systems to seismic exploration results, imaging, to facilitate the staff of seismic data interpretation, geological engineer underground geological structures, hierarchical information analysis, processing, and provide an important basis for determining the location of oil and gas wells. Seismic imaging systems mainly rely offset seismic data imaging, velocity model of the geological structure of the exploration work area is the basis of the application migration techniques. The velocity model is dependent on the three-dimensional structure of geological body model and interpolation techniques, has an important position in the seismic imaging system. The current study shows that the layered velocity modeling results can not satisfy the seismic imaging system with high accuracy the stack before migration imaging needs, and the bulk velocity modeling results can fine portrayed underground complex geological structures. The the geological block be expressed in a complete, accurate, easy to geological analysis, three-dimensional display and velocity model to meet the demand for high precision prestack migration imaging. Block modeling technology is a hot research topic in seismic imaging system. On the basis of the proposed block modeling the overall flow of the three key technologies in the seismic imaging system block modeling study. Paper work and innovations are as follows: (1) study, and two-dimensional / three-dimensional Delaunay triangulation algorithm to improve the Bowyer-Watson algorithm (the Delaunay cavity Act) in the key steps to reduce the error in judgment, to improve the two-dimensional / three-dimensional Delaunay Split the accuracy of the results. (2) a Delaunay triangulation-based Geological Surface Intersection Algorithm. Using triangle intersection test \resolve the inconsistent results and geological analysis of geological surface intersection process cross line;, one with the right geological surface and line extension of the line of intersection of the two endpoints at the same time in the surface boundary for block Conforming Delaunay triangulation subsequent body modeling, surface segmentation, surface trimming steps to complete the modeling of surface boundary. (3) improved 3D limited Delaunay triangulation algorithm. \The experimental results and the actual data test results prove the feasibility and effectiveness of the block modeling process, and a variety of improved algorithm proposed in this paper. The proposed triangle / tetrahedron quality standards applicable to speed interpolation and increase split triangle / tetrahedron quality is a need to work on in the future.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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