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| AN ANALYSIS OF THE AMPLITUDE CHARACTERISTICS OF SEISMIC REFLECTION DURING FLUID REPLACING |
| WANG Yong1,2, YANG He-hua2, GUI Zhi-xian2 |
1. Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China;
2. Oil and Gas Resources and Exploration of Ministry of Education Key Laboratory, Yangtze University, Jingzhou 434023, China |
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Abstract In the oil field development stage,water or gas injection mining will change reservoir properties and the fluid inside the reservoir,which may provide a possiblity for time-lapse seismic monitoring.Mainly based on Gassmann equation,the authors discussed in detail the variation regularity of seismic velocity and density when the reservoir pore fluid is replaced,and established a seismic geological model for water saturation variation according to the forecast result.Through analyzing and optimizing the amplitude attributes extracted from the model,the sensitive time-lapse seismic attributes suitable for this area was finally found.The result provides a basis for predicting the distribution of remaining oil.
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Received: 15 September 2011
Published: 10 December 2012
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