地球物理学进展 ›› 2014, Vol. 29 ›› Issue (3): 1298-1305.doi: 10.6038/pg20140341

• 应用地球物理 • 上一篇    下一篇

低序级断层地震波场特征

黄捍东1, 李祺鑫2,3, 刘学通4, 王彦超2, 刘承汉5   

  1. 1. 中国石油大学油气资源与探测国家重点实验室, 北京 102249;
    2. 中国石油大学提高采收率研究院, 北京 102249;
    3. 中海油研究总院, 北京 100027;
    4. 中国石油大学(华东)地球科学与技术学院, 青岛 266580;
    5. 长江大学地球物理与石油资源学院, 武汉 430100
  • 收稿日期:2013-08-30 修回日期:2013-12-11 出版日期:2014-06-20 发布日期:2014-06-20
  • 作者简介:黄捍东,男,1964年生,2000年获成都理工大学博士学位,现为中国石油大学(北京)提高采收率研究中心教授,博士生导师,主要从事复杂油气藏储层地球物理方法的教学和科研工作.(E-mail:webhhd@163.com)

Low-level faults characteristics of seismic wave field

HUANG Han-dong1, LI Qi-xin2,3, LIU Xue-tong4, WANG Yan-chao2, LIU Cheng-han5   

  1. 1. State Key Laboratory of Petroleum Resource and Prospecting, Beijing 102249, China;
    2. Enhanced Oil Recovery Institute, China University of Petroleum, Beijing 102249, China;
    3. CNOOC Research Institute, Beijing 100027, China;
    4. School of Geosciences, China University of Petroleum, Qingdao 266580, China;
    5. School of Geophysics and Petroleum Resources, Yangtze University, Wuhan 430100, China
  • Received:2013-08-30 Revised:2013-12-11 Online:2014-06-20 Published:2014-06-20

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.

Abstract:

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-to-noise 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.

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