The research of crosswell wavefield simulation in different shooting condition

摘要：

The crosswell seismic is the main method to monitor the change of elastic properties between well.In the crossweU seismic survey,the source and receivers work in a slender closed columniform room,not in the similar isotropic Media.In this research,according to the characteristic of source system and the particularity of the crosshole seismic survey,based on theory of elastic wave,we apply finite difference grid technique to simulate multiwave field in theoretical and practical crosswell model,in the different shooting conditions.The experimental results indicate: ① P and S-wave energy can be affected by the direction of the shooting force.Exerting a txx force (horizontal force)is beneficial for the effective excitation of P-wave,and a tzz force(vertical force) is beneficial for S-wave;② The SNR of multi-wave record in the well is related to excitable media in the well,the less difference of physical property between the media in well and surrounding rock,the higher SNR of records.Shooting in the well which is filled with water can effectively improve SNR of the crosswell record (suppressing multiple wave and diffracted wave).

关键词： the crosswell seismic shooting condition theoretical modeling

作者: Jiangping Liu Qing Yang Yinhe Luo Jian Shi

作者单位: Institute of Geophysics & Geomatics,China University of Geosciences,Wuhan 430074,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Environmental and Engineering Geophysics(第三届环境与工程地球物理国际会议)

会议地点: 武汉

会议语种:英文

页码: 101-105

在线出版日期: 2008-06-15（万方平台首次上网日期，不代表论文的发表时间）