【摘要】 研究区碳酸盐岩孔洞型储集层具有明显的地震响应特点,在地震剖面上表现为"串珠状"反射,在地震属性平面图上呈星状或团块状。通过对含油气储集层岩石地球物理分析,含油气孔洞具有低伽马、低波速的特点。采用由伽马曲线重构纵波速度曲线,由原声波时差曲线利用加德纳公式计算密度,以此得到拟声波阻抗,进而由拟声波阻抗反演来识别孔洞的含油气性。这种方法能够很好地突出含油气孔洞的特点,与属性分析技术结合能够更加准确地得到含油气储集层的分布,在研究区碳酸盐岩含油气孔洞型储集层的预测中取得了一定的应用效果。更多还原

【Abstract】 The carbonate vuggy reservoirs in this study area show obvious "string beads" reflection in seismic profile and star or massive feature in plane map of seismic attributes.The hydrocarbon-bearing vugs are characterized by low gamma ray and low velocity from geophysical analysis.The hydrocarbon-bearing property is identified by pseudo-acoustic impedance inversion using the method for reconstruction of acoustic velocity curve from gamma ray curve.Combination of this method with seismic attribute technique can more precisely predict the distribution of oil-gas reservoirs.更多还原