【摘要】 在高精度层序地层格架内,应用地震沉积学方法,通过90°相位转换、地层切片和分频处理,进行地震属性趋势和钻井综合分析,研究哈萨克斯坦南图尔盖盆地A区沉积岩岩性、沉积体系及其响应特征,确定沉积微相的边界与分布范围以及单砂体的体积、厚度与规模。研究结果表明:该区河流相发育,以河床滞留沉积、边滩、河漫滩、河漫湖泊等微相为主;不同频率对地震数据的相位等特性有不同响应,刻画地质体的横向不连续性能力也有所不同,频率为20~25 Hz时对河道砂体最敏感,在地层切片上完整清晰地刻画出河道边界、宽度、延伸长度及其平面几何形态。更多还原

【Abstract】 Using seismic sedimentology technologies,such as 90° phasing convertion,stratal slicing and frequency decomposition,lithology and facies of sedimentary rocks in block A of South Turgay Basin in Kazakstan were studied in the high-resolution sequence stratigraphic frameworks.And the boundary and distribution range of microfacies,even to the size,thickness and scale of single sand body were confirmed.The results show that the block A develops meandering river deposit,including four microfacies,i.e.,lag deposit,point bar deposit,flood-plain deposit and flood-lake deposit.And meanwhile,different frequency bands have different response features and different capabilities to characterize the horizontal discontinuity of geologic bodies in seimic data.The frequency decomposing stratal slicing(20-25 Hz) displays channel sand bodies clearly and characterizes channel boundary,width,extended length and plane geometric shape accurately.更多还原