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当储层含气后,地震波的高频信息衰减严重,这是利用地震衰减技术检测储层含气性的基础。在民丰洼陷,基于纯波地震资料及叠前时间偏移成果地震资料,利用地震衰减技术检测沙四下砂砾岩体含气性,分析了两种地震资料进行地震衰减计算的差异。结果表明,在检测民丰洼陷深层气方面,地震衰减技术取得了较好的应用效果。
When the gas is in the reservoir, the high frequency information of the seismic wave decays seriously, which is the basis of using the seismic attenuation technology to detect the gas content in the reservoir. Based on the seismic data of pure wave seismic data and prestack time migration results in Minfeng sub-sag, the gas attenuation of sand-gravel massif under Shahezi was detected by seismic attenuation technique. The differences of seismic attenuation calculation of two seismic data were analyzed. The results show that the seismic attenuation technology has achieved good results in detecting the deep gas in Minfeng sub-depression.