Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (3): 884-898.doi: 10.13278/j.cnki.jjuese.201703302

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AVA/AVF Characteristic Analysis of Fluid-Containing Thin-Bed in Time-Lapse Seismic

Yao Zhen'an1,2, Sun Chengyu1,2   

  1. 1. School of Geoscience, China University of Petroleum (East china), Qingdao 266580,Shandong, China;
    2. Evaluation and Detection Technology Laboratory of Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071,Shandong, China
  • Received:2016-09-01 Online:2017-05-26 Published:2017-05-26
  • Supported by:
    Supported by the National Natural Science Foundation of China (41374123, 41504097), the Natural Science Foundation of Shandong Province (ZR2013DQ020) and the National Science and Technology Major Project of China (2016ZX05006-002)

Abstract: With the rapid development of seismic exploration, it is more and more important to explore reflection reflected mechanism of thin interbeds. In order to acquire the frequency characteristic of thin bed reflection and realize its changing feature in time lapse seismic, on the one hand, the authors discussed the AVA/AVF characteristic of fluid-containing thin bed based on elastic wave theory, and carried numerical simulation experiment; on the other hand, the authors analyzed time shift characteristics of fluid-containing thin bed based on the equivalent medium theory with the actual logging data. As it is shown that the amplitude responses associated with bed-thinning is equivalent to that associated with an increase in dominant frequency. With the increase of thickness, the reflection of thin bed experiences greater fluctuations. The frequency characteristic of a thin bed extends to higher frequency with increasing of incident angle. In the water flooding extraction process of thin layer reservoir, with increasing of the water saturation, the frequency characteristic of P wave reflection extends to higher frequency, whereas that of P-SV wave reflection remains about the same.

Key words: fluid-containing thin-bed, time-lapse seismic, AVA, AVF

CLC Number: 

  • P631.4
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