- 责任者：Jia Yirong (Chengdu University of Technology ; Chengdu 610059 ; China) ; He Zhenhua
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2011
- 卷期：33(3)
- 关键词：地震勘探 ; seismic exploration ; 速度场 ; velocity field ; 二连盆地 ; Erlian Basin
- 页码：p.243-247
- 图表：7 illus., 1 table, 9 refs.
- 分类号：1600
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
Depressions in Erlian Basin are long and narrow with complex faults and structures. Challenges for correct structure mapping include complex structure imaging and sharply lateral variable velocity analysis. Traditional methods by using stack velocity spectrum do not meet the demands of high precision seismic interpretations. The improved structure mapping in this paper involves the following steps: 1) creating velocity model by stacking velocity spectrum based on seismic pre-stack time migration data; 2) calibration of the velocity model with well log and seismic data and building up a transversely variable 3D seismic velocity model; and 3) implementing time-depth conversion for target layers using the revised velocity model. Real seismic data processing in Erlian Basin shows that the transversely variable 3D seismic velocity model can be used to improve complex structure mapping.