【作者】 王红；

【导师】 任丽华； 李红梅；

【作者基本信息】 中国石油大学(华东) ， 地质工程（专业学位）， 2017， 硕士

【摘要】 济阳坳陷浅层河流相油气藏分布普遍,资源丰厚,然而受到沉积微相和储层厚度的差异性、流体类型和饱和度等多因素影响,该类油气藏地震响应呈现亮点、非亮点等多种复杂的特征,为储层尤其是流体的识别和预测带来了难度。本研究以济阳探区浅层河流相储层为主要研究对象,在岩石物理分析的基础上,利用正演模拟技术,开展了浅层流体地震识别与预测研究。研究认为,不同流体对浅层砂岩储层的速度、密度产生不同程度的影响,天然气储层速度、密度降低主要是气体物理性质占主要作用,而油层速度、密度的变化除与油的性质有关,还与油气早期充注有关;储层厚度和物性对地震反射的贡献大于储层含油性的贡献,影响叠后振幅、频率变化的主要是厚度及结构的变化,频谱衰减与储层流体有关,储层含流体性质不同,衰减程度不同;应用叠前弹性反演技术得到泊松比等对储层流体反映敏感的弹性参数来识别河流相储层流体具有较好的效果。更多还原

【Abstract】 The oil-gas reservoirs of shallow fluvial facies is rich in Jiyang Despression.but because of different sedimentary microfacies,reservoir thickness,fluid type,saturation and etc,this kind of reservoir have variety of complex seismic reflection characteristics: some times bright spot and some times dim spot.So it’s difficult to predict reservoir and fluid.The paper made the study of shallow fluvial facies reservoir in Jiyang exploration area as the main research object.On the basis of rock physics analysis,using the forward modeling technology,carried out the shallow fluid identification and seismic prediction.The research shows that difference of fluid type have different influence on the shallow sandstone reservoir of its velocity and density,the difference of physical property of gas reservoir mainly accounts for its velocity and density decrease,For the oil,the change of reservoir velocity and density not only with its properties,but also related to early filling of oil and gas.Reservoir thickness and physical properties make greater contribution on seismic reflection than the oil in the reservoirs,the influence on the variation of post-stack amplitude and frequency is mainly caused by the thickness and structure changes of the reservoir.Spectrum attenuation is associated with reservoir fluid,different reservoir fluid properties,different attenuation degree.The elastic parameters of the prestack elastic inversion technique,such as poisson ratio and ect,which used to identify the reservoir fluid,made good effect.更多还原