【摘要】 在寻找有效地层圈闭的过程中,常规振幅分析方法很难准确识别地层尖灭点(线)的位置。从正演模型分析出发,分析了不同地震属性识别地层尖灭点的情况,提出了相位分析技术。该技术采用相位类等反映几何学属性信息的参数识别地层圈闭的构建特征,描述地层界面的空间变化和识别地层尖灭点的位置;沿目的层同相轴向地层超剥带进行自动追踪,在追踪得到的层位上提取相位类属性,属性分界线即为地震识别出的地层尖灭线。实际应用证明相位分析技术是解决地层圈闭识别与定量描述的有力工具。更多还原

【Abstract】 Overlap and denudation belt is too thin and the tuning action around the overlap and denudation point results in the fact that the pinch-out point of reflection homomorphous axis is inconsistent with the actual overlap and denudation boundary. And it is hard to identify the stratigraphic pinchout point and line correctly to recognize effective stratigraphic trap using conventional kick sorting method. On the basis of the forward model, this paper analyzed the status of the different seismic attributes and put forward with phase analysis technique. It adopts the phase parameters that reflect geometry attribute information to identify the stratigraphic trap structural style and the location of the pinch-out point, and to describe the special variation of formation boundary. The formation of interest is auto-traced extending to overlap and denudation belt,and then along it phase attribute is extracted. The attribute boundary is the stratigraphic pinch - out line. The phase analysis technique was applied to the practical geological area,and the results show that it is an effective way to identify and describe quantitatively the stratigraphic trap.更多还原