【作者】 田腾飞；

【导师】 林承焰；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2010， 硕士

【摘要】 地震沉积学是建立在地球物理学、沉积学、地震地层学及层序地层学等学科基础上的一门新学科,主要是在地质规律(尤其是沉积环境及沉积相模式)的指导下利用三维地震信息和现代地球物理技术进行地层岩石宏观研究和沉积体系、沉积相平面展布以及沉积发育史的研究。随着地球物理技术的快速发展和隐蔽油气藏勘探日益迫切的需要,地震技术的应用越来越普遍。本文以葡萄花油田葡I油组为例,开展了地震沉积学研究。针对研究区砂体“窄、薄”的特征,在精细构造解释的基础上,运用合理的标准层标定及沿层地震属性提取和解释,实现了空间地震属性变化解释小于最小分辨率砂体的变化,揭示了“窄、薄”砂体的分布。同时,论文还从储层野外露头观察出发,引入探地雷达技术,建立了露头区储层原型模型。以该模型为指导,在研究区运用90°相位转换、地层切片、属性分析及分频解释等关键技术开展地震沉积学研究。90°相位转换是为了使同相轴和较薄砂体对应,赋予地震同相轴以地质意义。地层切片技术的运用是为了使地震解释更符合地质意义,建立等时地层格架。地层切片所建立的等时格架中提取属性及分频解释,可以得到具有时间意义的属性切片。通过开展研究区地震沉积学的研究,得到了等时沉积单元的砂体展布,与井数据所成的砂体展布图相比,更为精细地刻画出砂体在平面上的分布形态。更多还原

【Abstract】 Seismic sedimentology is a new subject which based on geophysics, sedimentology, seismic stratigraphy and sequence stratigraphy. With the fast development of geophysical technology and the need of the exploring of the subtle reservoir, seismic technology is used generally. Under the direction of geology regularity, this subject aims to carry out a study on macroscopic sedimentary sets, sedimentary facies planar distribution and sedimentary evolution history through the 3D seismic information and modern geophysics technology.This paper was studied the interest region by seismic sedimentology, example of the Putaohua oil field PI oil layer. The seismic sedimentary facies explanation can be carried in the study area in which the sand bodies are narrow and thin. The research of reservoir prototype model occupies an important position in seismic sedimentology and it can be regarded as a bridge that connects these two research fields of seismology and geology. Several key technologies of seismic sedimentology are 90°phase change, stratal slicing, attribute analysis and interpretation of frequency. 90°phase change is used to correspond the phase axis and thin sand, giving geological sense to seismic event. The application of stratal slicing technique is to make seismic interpretation more in line with geological significance, so establishing isochronous stratigraphic framework. Through extracting properties from isochronous framework established by stratal slicing and making frequency-division interpretation, property section with time sense can be achieved. Under the guidance of the prototype model of the reservoir, sand prediction and research of sediments history can be made.Through the study of seismic sedimentology, Obtained distribution of sand body, and same as the well data into the sand body, more precise portrait of sand distribution.更多还原