石油学报 ›› 2009, Vol. 30 ›› Issue (5): 744-748.DOI: 10.7623/syxb200905020

• 油田开发 • 上一篇    下一篇

微破裂向量扫描技术原理

沈琛1, 梁北援2, 李宗田3   

  1. 1. 中国石油化工股份有限公司油田勘探开发事业部, 北京 100020;
    2. GeoImage, LLC, CO., 80016 USA;
    3. 中国石化石油勘探开发研究院, 北京 100083
  • 收稿日期:2009-01-13 修回日期:2009-03-30 出版日期:2009-09-25 发布日期:2010-05-21
  • 作者简介:沈琛,男,1964年2月生,2004年获同济大学博士学位,现为中国石油化工股份有限公司油田勘探开发事业部总工程师,教授级高工,主要从事油气田勘探开发理论、技术研究及现场应用工作.E-mail:shenchen1220@sohu.com

Principle of vector scanning technique for micro-fractures

SHEN Chen1, LIANG Beiyuan2, LI Zongtian3   

  1. 1. Department of Oilfield Exploration and Production, China Petroleum & Chemical Corporation, Beijing 100020, China;
    2. GeoImage, LLC, CO. 80016, USA;
    3. Sinopec Research Institute of Petroleum Exploration and Production, Beijing 100083, China
  • Received:2009-01-13 Revised:2009-03-30 Online:2009-09-25 Published:2010-05-21

摘要: 对Semblance叠加公式进行了扩展,考虑了震源机制及其求解过程,开发了微破裂向量扫描技术,在开发区使用地震台网扫描地下空间破裂活动释放的能量,以适应地表监测微破裂时信噪比较低、地下微破裂多为剪切错动的特性.类似于开发区观测环境的算例结果表明,当信噪比降低至0.5时,人们仍可辨别破裂能量释放点,并估计破裂的震源机制.由此可知,利用不影响生产的、稀疏的、三分量的地震台网在地表监测开发区的地下破裂并使用微破裂向量扫描处理技术是可行的.

关键词: 微破裂监测, 被动源地震, 向量扫描, 震源机制, 信噪比

Abstract: A vector scanning technique for micro-fractures was developed on the basis of seismic mechanism and Semblance addition to adapt the lower signal-to-noise ratio observed on surface and many slip fractures in production regions.The studied case similar to observation environment shows that the fracture points can still be identified in space and time even though the ratio is 0.5,and the seismic mechanism can be estimated through the scanning.It is feasible to monitor the fracture activities using the seismic network with independent,3-component,sparse distribution and the processing method.

Key words: micro-fracture monitoring, passive seismic, vector scanning technique, seismic mechanism, signal-to-noise ratio

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