【摘要】 东营凹陷北带盐下砂砾岩体具有良好的成藏条件,但由于深层地震资料的分辨率低,盐下砂砾岩体勘探具有较大的风险。因此,基于现有资料,对盐下砂砾岩体的地震预测技术进行了探索。首先进行了成藏控制因素和成藏模式分析,将扇体分为近岸水下扇和深水浊积扇两大类;然后针对不同类型的扇体,分别讨论了相应的地震预测方法。对于近岸水下扇,采用岩石物理分析、正演模拟、地层切片和叠前弹性阻抗反演等方法进行储层预测和流体识别;对于深水浊积扇,利用地震属性分析、测井约束反演和吸收特征分析等方法,进行储层预测和含气性分析。预测结果与钻井结果的对比表明,上述地震预测方法可以有效识别储层的含气性,划分有利勘探区。更多还原

【Abstract】 The sub-salt glutinite bodies in the northern zone of Dongying Depression provide favorable pooling potential.However,because of the low resolution of seismic data from deep layers,the exploration of sub-salt glutinite bodies still has risky.Therefore,based on the existing data,we probed seismic prediction technique of sub-salt glutinite bodies.Firstly,the pooling controlling factors and pooling patterns were analyzed,and the fans were classified into nearshore subaqueous fan and deep-water turbidite fan.Then,seismic prediction methods discussed for different types of fans.For nearshore subaqueous fan,petrophysical analysis,forward modeling,strata slice and pre-stack elastic impedance inversion can be used for reservoir prediction and fluid identification;for deep-water turbidite fan,seismic attributes analysis,logging constraint inversion and absorption characteristics analysis can be adopted for reservoir prediction and gas-bearing analysis.The comparison between prediction results and drilling results show that the above seismic prediction method can effectively recognize the ga~bearing of reservoirs and identify favorable exploration area.更多还原