Dissertation > Excellent graduate degree dissertation topics show

Methodology of PS-to-PP Time Mapping and Simultaneous Inversion Using P-P and P-S Wave Seismic Data

Author: ZhangFengZuo
Tutor: SongJianGuo
School: China University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: Converted wave Joint inversion Prestack AVA inversion Correction factor
CLC: P631.4
Type: Master's thesis
Year: 2011
Downloads: 113
Quote: 0
Read: Download Dissertation

Abstract


Due to the need for exploration of lithologic reservoirs , and therefore more accurate elastic parameters for reservoir prediction and fluid identification work is imperative . The rise of the multi - wave and multi - component seismic exploration , converted wave static correction, offset imaging technology has become more sophisticated , so as to lay a solid foundation to carry out the joint longitudinal wave and converted wave inversion . Converted wave data added , reducing the condition number of matrix inversion and singularity , thereby improving the accuracy of the inversion , especially shear wave velocity inversion accuracy . The inversion method of research in this paper is based on the generalized linear inversion of prestack AVA inversion angle domain imaging point gathers as the longitudinal wave and converted wave prestack time migration inversion input seismic gathers rms velocity of the longitudinal wave and converted wave migration velocity analysis as an inversion of the initial model , as well data constraints from accurate zoeppritz equation prestack AVA three by forward simulation iteration method the parameters simultaneously inversion , compressional wave velocity, shear wave velocity and density inversion parameter . Multiwave AVA inversion accuracy the most important factor is the longitudinal wave and converted wave data matching problem , the problem has been a difficult issue in the multi - wave and multi - component seismic exploration . The papers by the previous method , the relationship between the use of longitudinal wave rms velocity and converted wave rms velocity to extract the method to calculate the average S-wave velocity ratio will be converted wave travel compression to longitudinal waves travel when the correction coefficient , the prestack longitudinal wave and converted wave angle gathers thus completing the match . The paper also discussed in turn phase correction prestack gathers , AVA true amplitude recovery and partial stack inversion results . Single longitudinal wave inversion of shear wave speed estimates are inaccurate ; the single converted wave inversion of P-wave velocity estimates are inaccurate ; the simultaneous longitudinal wave , converted wave inversion can get accurate P-wave velocity and S-wave velocity estimated .

Related Dissertations

  1. Study of the Elastic Parameters Inversion Base on Improved Immune Algorithm,P631.4
  2. DMO Correction Technic of P-SV Converted Waves,P631.4
  3. The Prestack Joint Inversion of 3D Multi-wave with AVA of VSP,P631.4
  4. 3D Multi-wave Pre-stack Inversion and Its Application,P631.4
  5. Multi-Wave (Including VSP) Velocity Analysis and Nmo Correction Imaging,P631.4
  6. The Study Andapplication of the Multiscale Seismic Data Joint Inversion Method,P618.13
  7. Forward Modeling and Characteristic Analysis of Thin Beds AVO,P631.4
  8. Methodology of Prestack Joint Inversion Based on Muti-component Surface Seismic Data,P631.4
  9. Magnetic, Density Interface and the Polygon Model the Joint Inversion of Gravity and Magnetic,P631.4
  10. Mathematical Methods and Its Programming in Converted Wave Statics by Method of Surface Wave,P631.4
  11. Converted wave gathers extraction of multiple coverage,P631.4
  12. Converted wave prestack time migration and birefringence analysis technique,P631.4
  13. Joint Study of Source Parameters of Small to Moderate Earthquake,P315.3
  14. Muiti-scale Joint Modeling and Joint Inversion,P631.4
  15. Conversion Point Estimation by Searching Optimal Angle and Ray Tracing of Converted Wave,P631.4
  16. Nantong increase regional geophysical field characteristics,P738
  17. Joint Inverse Study of Gravity and Seismic Data for 2D Multi-density Interfaces Basing on Integration of the Objective Function,P631.4
  18. Reconstruction based on high frequency electric match well , constrained inversion of electric shock,P631
  19. Seismic exploration research on mathematical approximation problem,P631.4
  20. Application of Nonlinear Optimization Method in Static Correction of Converted Wave,P631.4

CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
© 2012 www.DissertationTopic.Net  Mobile