【摘要】 塔河油田碎屑岩储层厚度较小,薄层AVO特征受薄层内多次波反射以及薄层调谐效应和频率滤波效应影响,导致薄层AVO特征与厚层AVO特征差异较大。为此,笔者设计了不同含油气性薄层砂体模型来进行波动方程正演模拟,得到了CRP道集记录,提取了目的层反射振幅,基于入射波振幅计算了反射系数,从而获得了薄层地震正演AVO曲线,分析了塔河油田碎屑岩储层含不同流体时的AVO特征,找出了实际地质条件下的含油气性与AVO属性特征的对应关系,以指导地震剖面上的含流体预测工作。更多还原

【Abstract】 The thickness of clastic rock reservoir in Tahe Oilfield is small.AVO characteristics in thin layer are affected by multiples,tuning effect and frequency filtering effect in thin interbeds.The AVO characteristics in thin interbeds are different from those in thick interbeds.Therefore,this paper designed different thin hydrocarbonic sandstone reservoir models for wave-equation modeling.We acquired the CRP gathering records,extracted the target layer reflection amplitude.We get the reflection factor based on the amplitude of incident wave,and obtain thin seismic forward AVO curves to analyse the AVO characteristics of reservoir rocks with different fluids in Tahe Oilfield.In the actual geological conditions,the relationship between hydrocarbon and AVO attributes was used to guide fluid forecast in the seismic profile.更多还原