井间地震观测数据模拟和偏移的有限单元法

The finite unit method of cross-hole seismic observations modeling and migration

近年来,由于井下地震震源和特殊的数据采集设备的研制及不断改进,井间地震观测系统,及其随后的井间速度模型的地震旅行时反演(又称地震层析方法)正在发展成为一项用于储层研究、油藏描述和解决某些油藏工程问题的实用技术。文章给出了用于井间地震数据模拟和偏移的有限单元波动方程数值解模型,提出了适用于该算法的吸收边界条件,并导出了可靠的数值解结果。

In recent with the advancement of seismic source and special acquisition equipment manufacturing and their on-going improvement, crosshole seismic observation system and seismic travel time inversion for crosshole velocitymodeling (also tomography) is developing imto a practical technique for reservoir research, description and resolvesome problems concerning reseroir engineering. A finite element wave-equation numerical model are given, absorp-tion boundary condition for the method are put forward and rwliable numerical result is derived.