【摘要】 本文主要阐述藏北羌塘盆地龙尾错区块的二维反射地震试验的数据采集和处理的过程。分析两条剖面的反射特征,并对叠加剖面进行了初步解释:羌塘盆地中央隆起北侧存在大规模的深凹陷构造;盆地浅部不同方向的构造变形存在较大差异;出现较强的基底反射特征;中生代、古生代地层的反射特征差异较大。文中尝试对数据处理过程中的叠加速度变化进行研究,获得了与叠加剖面较一致的结果,并进一步对某探井的构造背景提出见解。更多还原

【Abstract】 This paper deals with the test conducted along two 2-D seismic reflection profiles in Longweicuo area of north Qiangtang basin, Tibet. Flows and parameters of seismic data acquisition and processing are discussed, and the main characteristics of the two profiles are interpreted tentatively. Some conclusions have been reached: there is a large-sized deep depression on the north wedge of the central uplift in Qiangtang basin; there exist obviously different reflections of structural deformation in different directions, with the basement showing strong reflections and Paleozoic strata displaying weak reflections; there also exist apparent differences between Mesozoic strata and Paleozoic strata. The authors studied stack velocity from data-processing and obtained a result consistent with the stack seismic data. Furthermore, some opinions were put forward on the structural background of a drilling hole arranged near one of the seismic profiles.更多还原