摘要
低序级断层的正确识别,对油田开发后期落实剩余油分布、解决注采矛盾具有重要意义.本文首先使用高阶交错网格有限差分法对声波方程进行离散求解,对于吸收边界的处理采用完全匹配层(PML)技术,实现了对地震波传播的模拟.借助叠前深度偏移技术,从低序级断层的产状特征、地震资料频带及信噪比等因素入手,设计断层模型,利用声波方程模拟低序级断层的波场,经过叠前深度偏移处理,探讨低序级断层在偏移剖面及切片上的表现规律,得出在不同资料质量以及不同地质情况下,所能够识别的断层极限.研究成果对低序级断层的正确判别、提高断层检测方法的可信度具有重要意义.
The correct identification of the low-level faults is of great significance for detecting the distribution of remaining oil in the late field life and balancing the conflict between injection and production.Firstly,the acoustic wave equation is solved by using high-order staggered grid finite difference method,and adopted the PML absorbing condition,so implemented the seismic wave propagation simulation.With the pre-stack depth migration technology,starting from the mode of occurrence of low-level faults,seismic data frequency band and signal-tonoise ratio and other factors,this paper designed low-level fault models and simulated the seismic wave field by using acoustic wave equation modeling technology and pre-stack depth migration technology,discussed the performance of low-level faults in the migrated profiles and slices.The research results contribute to the correct classification of low-level faults and improve the credibility of detection of faults.
出处
《地球物理学进展》
CSCD
北大核心
2014年第3期1298-1305,共8页
Progress in Geophysics
基金
国家重大专项"南堡凹陷油气富集规律与增储领域"(2011ZX05006-006)
国家973专项"深部有效碎屑岩储层成因机制与发育模式"(2011CB201104)和"低渗透油田弹性驱替界限与开发后期井网优化调整技术研究"(2011ZX05009)联合资助
关键词
声波方程正演
叠前深度偏移处理
低序级断层识别
acoustic wave equation forward modeling
pre-stack depth migration
low-level faults identification
