地震资料成像和构造成图中速度的分析与应用

叠前深度偏移和叠后变速构造成图是解决速度横向变化剧烈区成像和成图的两种重要方法。基于这两种方法中速度求取的基本原理,结合江汉探区的应用实例,提出叠前深度偏移可以较好地解决复杂地表和深层地质构造条件下地震成像问题;叠后变速构造成图可以较好地校正速度横向变化造成的构造畸变,并可能识别隐蔽性油气圈闭。这些方法将为深化江汉油区油气勘探和开发提供有力的技术支持。

Analysis and application of the velocity in imaging of seismic data and mapping of structure

Prestack depth migration and poststack velocity-varied structure mapping are two important methods to solve the problems about the seismic data imaging and structure mapping in the areas where lateral velocity change greatly.On the basis of the principles of two methods of velocity extracting,combined with some examples in Jianghan Exploring Region,we suggested that Prestack depth migration can better solve the imaging problem caused by complex earth surfaces and deep geological structure,and poststack velocity-varied structure mapping can better correct the structural aberration caused by great lateral change in velocity and identify subtle reservoir traps.These methods can provide powerful technology support for the oil and gas exploration and exploitation in Jianghan oil Region.