【摘要】 塔里木盆地塔中地区上奥陶统良里塔格组是重要的油气储集层,储层类型多样,非均质性强,有效预测难度大。针对上述特点,利用15口井的钻井和测井资料,通过交会分析方法,对良里塔格组的岩石地球物理特征进行了分析研究。结果表明,波阻抗对物性的变化比较敏感,对储层类型有较好的反映,对岩性和流体不敏感。因此,利用常规地震资料可以对塔中地区奥陶系碳酸盐岩大裂缝型、裂缝-孔洞型、孔洞型、洞穴型储层进行有效预测。更多还原

【Abstract】 The Lianglitage formation of Upper Ordovician in Central Tazhong area at Tarim basin is an important hydrocarbon reservoir. The various types of reservoirs have strong heterogeneity, which is difficult to be predicted.Aiming at the above characterstics, drilling and logging data from 15 wells were used to analyze the petrophysical characteristics of Lianglitage formation by cross plot analysis.The results showed that wave impedance was relatively sensitive to the change of physical properties,which well reflected reservoir type,but wave impedance was not sensitive to lithology and fluid.Therefore,conventional seismic data can be used to effectively predict large fractured,fractured-cavern,carven and cave reservoirs of Ordovician carbonate in Central Tarim basin.更多还原