【摘要】 孔隙度是储层的重要参数之一,学者提出了多种根据地震属性分析孔隙度大小的方法.然而,层状孔隙介质中孔隙度对地震属性的影响至今没有系统的论述.鉴于此,本文建立了两种类型储层:其一为深度压实,固结程度好的储层;其二为欠压实,固结程度差的储层.对于上述两种类型储层,通过理论和数值模拟,分析了孔隙度对地震属性(与频率相关)的影响.研究表明,对于深度压实储层,反射系数随孔隙度的增加而减小;对于欠压实储层,反射系数随孔隙度的增加而增加.更多还原

【Abstract】 Porosity is an important character of hydrocarbon reservoir.Researchers have proposed many methods to estimate porosity from seismic data.However,the impact of porosity on seismic attributes in thinly layered porous media was not systematically studied.In this paper,two types of reservoir models were selected.One represents consolidated,deep,high-impedance reservoir.The other represents unconsolidated,shallow,low-impedance reservoir.Using analytic equations and numerical modeling,we have investigated the impact of porosity on the frequency dependent seismic attributes in thinly layered porous media.The study found that porosity can affect seismic attributes significantly.For high impedance reservoir,magnitude of the reflection coefficient decreases when porosity increases.On the other hand,for the low impedance reservoir,magnitude of the reflection coefficient increases when porosity increases.更多还原