- 责任者：Song Lihu (State Key Laboratory of Earthquake Dynamics ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Hao Chongtao
- 刊名：Seismology and Geology
- 出版年：2012
- 卷期：34(3)
- 关键词：三维地震法 ; three-dimensional seismic methods
- 页码：p.477-487
- 图表：illus., 21 refs.
- 分类号：1600
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
In order to analyze the P-wave reflection time-distance characteristic systematically and accurately, this paper regards 3D curved interface as the envelope of 3D dipping interface with different tendencies and inclinations, and presents a method for calculating P-wave reflection time-distance from 3D curved interface, using the principle of reflection from 3D dipping interface. Based on the dip layer CDP theory,the location of shot points and reflection travel times are obtained from the positions of receivers and surface CDPs, finally, the 3D P-wave reflection records of shot gather are received, assuming that the distribution of interface reflection points is known. The results show that this method has high computing efficiency and can be applied to analysis of the P-wave reflection time-distance characteristic with different positions of shots; especially it can reveal the relation between reflection points and time-distance curve.