【摘要】 塔里木盆地塔河油田上奥陶统覆盖区碳酸盐岩缝洞型储层以其自身独有且极为复杂的空隙结构而区别于孔隙性砂岩储层,其低孔、非均质性和各向异性的三大特点给地震给储层预测带来极大的难度。探讨了利用精细波形分类法识别和预测缝洞储层的方法。介绍了该方法的基本原理和实现过程,首先分析研究区碳酸盐岩储层特征确定时窗长度的选取;然后根据产能、钻井、测井、地质等各种实际资料,结合地震波形分析和反射机理研究,总结裂缝发育层段(时窗段)的特征波形,建立储层与地震之间的响应模式,确定储层的精细分类,再根据拟合度准则进而对未知区域作储层预测,最终得到有利储层的地震反射空间展布。应用效果表明了这种方法的有效性。更多还原

【Abstract】 The carbonate fracture-cave reservoir in the upper Ordovician area in Tahe oilfield,with the unique and complicated interspace framework,differs from porosity sandstone reservoir.The three characteristics,low porosity and heterogeneity and anisotropic,make the seismic and reservoir interpretation difficult.The method using fine waveform classification to identify and predicate fracture-cave reservoirs is discussed.The basic principle and realization process of the method are introduced.First,window length should be determined by analyzing carbonate reservoir characteristics in the research area.Second,based on the practical data of productivity,drilling,logging,geology and so on,combined seismic waveform analysis and reflection mechanism study,summing-up characteristic waveform of window length in fracture growth bed,response mode between carbonate reservoirs and seism should be established,fine reservoir classification is determined.Third,using the principle of the fitting degree predicates unknown area’s reservoirs;finally,seismic reflection space distribution of the favorable reservoirs is obtained.The application effect shows the effectiveness of the method.更多还原