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地震波衰减与砂岩含油气存在一定的关系 ,当地震波穿过含油气砂岩时 ,能量发生明显的高频衰减。本文应用了地震信号能量衰减 EAA( Energy Absorption Analysis)技术 ,连续计算、分析地震波剖面的高频衰减系数 ,并考虑到介质背景衰减的平缓变化 ,衰减剖面中的异常变化值与地层含油气有关。在 SN油田 SSK- 1测线过井的地震纵波衰减剖面上 ,长 2组表现出产油气层与地震波能量衰减强的部位相吻合。在测线东部有利地段预测出另一油气异常区
The attenuation of seismic waves is related to the presence of oil and gas in the sandstone. When the seismic waves pass through the oil-bearing sandstone, the energy of the seismic waves attenuates obviously. In this paper, the Energy Absorption Analysis (EAA) method is applied to continuously calculate and analyze the high frequency attenuation coefficient of seismic wave profile. Considering the gradual change of medium background attenuation, the abnormal change value in attenuation profile is related to the formation oil-bearing gas. In the seismic P-wave attenuation profile of SSK-1 over-measured in the SN Oilfield, the Long 2 sets show that the hydrocarbon-bearing layers are consistent with the strong attenuation of seismic energy. Another favorable area for oil and gas anomalies is predicted in the favorable area of the eastern part of the survey line