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本文针对长垣南部扶杨储层泥质含量高、低孔隙度低渗透率、低电阻率的特点,利用岩心数据结合测井资料,建立了储层孔隙度、渗透率参数的计算方法。通过岩心分析确定伊利石为扶杨油层主要粘土矿物类型,阳离子交换能力强,利用泥质砂岩阳离子交换容量求取粘土束缚水饱和度。由于储层孔隙结构复杂,微孔隙发育,采用有效介质对称电导率模型作为计算含水饱和度的方法。应用在长垣南部扶杨油层的测井资料解释中,提高了测井解释符合率,取得了较好的地质应用效果。
In this paper, based on the characteristics of high shale content, low permeability and low resistivity of Fuyang reservoir in the southern part of Changyuan, the calculation method of reservoir porosity and permeability parameters is established based on core data and logging data. Through the core analysis, it is confirmed that illite is the main clay mineral type in Fuyang oil layer, and its cation exchange capacity is strong. The clay irreducible water saturation is calculated by using the cation exchange capacity of shale sandstone. Due to the complex pore structure of the reservoir and the development of microporosity, an effective dielectric symmetry conductivity model is adopted as a method to calculate water saturation. Applied in the interpretation of well logging data of Fuyang reservoir in the south of Changyuan, the coincidence rate of well logging interpretation is improved and good geological application effect is achieved.