【摘要】 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。更多还原

【Abstract】 Upper Ordovician reef shoal reservoir is one of reservoirs in the Tazhong BZ area.This reservoir is characterized as deep burial,low permeability for matrix porosity,structural fissure as well as pore,fissure and cavity which was formed by dissolution,representative of lateral anisotropy and various types.Thus,it is difficult to predict the distribution of reef shoal reservoir by post-stack acoustic impedance inversion technique.In this paper,we use the pre-stack elastic-impedance inverse technique to predict the distribution of carbonate reservoir,since it has high resolution of reservoir prediction compared with the post-stack acoustic impedance inversion.This result of the reef shoal reservoir prediction is consistent with the drilled data.更多还原