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塔中BZ井区上奥陶统良里塔格组礁滩体储集层是油气勘探重要目的层之一,其特点是埋藏深,储集层基质孔渗低,储集空间多为构造裂缝及溶蚀作用所产生的孔、缝、洞系统,储集体受多种因素控制,纵横向非均质性强,叠后声阻抗反演技术和常规叠后地震属性分析技术难以有效预测该类储层。因此有必要开展叠前弹性波阻抗反演研究。给出了叠前弹性波阻抗反演技术的主要实现方法、步骤,比较了利用弹性波阻抗反演技术与常规叠后声阻抗反演技术预测上奥陶统良里塔格组礁滩体储层实际应用效果。结果表明弹性参数预测储层分辨率高,能够反映碳酸盐岩储层非均质性分布特征,与实际的钻探成果具有较好的一致性,该方法对塔中地区下一步碳酸盐岩油气勘探具有一定的参考意义。
The Upper Ordovician Lianglitageo reef bank reservoir in the BZ well area of Tazhong is one of the important hydrocarbon exploration target reservoirs. It is characterized by deep burial, low porosity and permeability of reservoir matrix, and more reservoir space for structural fractures and erosion The pores, seams, cave systems and reservoirs produced by the action are controlled by many factors, and the vertical and horizontal heterogeneities are strong. Post-stack acoustic impedance inversion and conventional post-stack seismic attribute analysis techniques are difficult to effectively predict such reservoirs. Therefore, it is necessary to carry out prestack elastic wave impedance inversion research. The main methods and steps of prestack elastic wave impedance inversion are given, and the prediction of actual reservoirs in Lianglitageo reef of Upper Ordovician by using elastic wave impedance inversion and conventional poststack acoustic impedance inversion Application effect. The results show that the elastic parameters predict the reservoir resolution is high, which can reflect the heterogeneity distribution of carbonate reservoirs, which is in good agreement with the actual drilling results. This method is suitable for the next carbonate rock Oil and gas exploration has certain reference value.