基于拟柱坐标系的2.5-D声波方程数值模拟
李芳1 ,孙建国2 ,姚健3
1.中国石油大学 资源与信息学院,北京 102249;2.吉林大学 地球探测科学与技术学院 波动理论与成像技术实验室,吉林 长春 130026;3.中海石油(中国)有限公司 天津分公司,天津 300452
2.5-D ACOUSTIC WAVE MODELING BASEDON QUASICYLINDRICAL COORDINATE
LI Fang 1 ,SUN Jianguo 2 ,YAO Jian 3
1.Faculty of Geosciences, China University of Petroleum, Beijing 102249,China;2.College of Geoexploration Science and Technology, Jilin University, Changchun 130026;3.Tianjin Branch Company of CNOOC(China) Ltd., Tianjin 300452,China
摘要 2.5-D拟柱坐标法是一种新兴的2.5-D问题的处理方法,该方法最大的优点在于拓宽常规柱坐标法数值模拟的应用范围,能够处理非
轴对称模型,而且计算简便,尤其适宜解决大尺度地震勘探耗时多的难题。笔者发展了基于拟柱坐标系采用交错网格高阶有限差分法求解
2.5-D拟柱坐标声波方程的数值模拟算法,并分别通过简单的单倾斜界面模型和较复杂的非轴对称模型的数值实例验证该方法的正确性和可
行性。
Abstract :The 2.5-D quasi-cylindrical method has been proposed recently for simulation of 2.5-D case. The remarkable
advantage of the quasi-cylindrical approach over the common cylindrical approach is that it can deal with non
rotationally symmetric situation, aiming at broadening this range of application. In addition, for largesized surveys
the quasi-cylindrical approach is very efficient as compared with the conventional 2.5-D methods. In this paper, the
authors have developed an implementation of this approach which is based on quasi-cylindrical acoustic wave equation,
using the higher-order staggered finitedifference method. With some numerical examples including axisymmetric and
non-axisymmetric models, this paper demonstrates the validity and feasibility of the authors' approach.
收稿日期: 2008-10-30
出版日期: 2009-09-15
基金资助: 国家自然科学基金(No.40574052)
通讯作者:
李芳(1981-),女,内蒙古,回族,博士研究生,从事地震波场数值模拟及地震资料解释方面的研究,公开发表学术论文数篇。
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