层速度精度与速度横向变化规律

本文针对层速度的精度问题,结合实际资料研究层速度的横向变化,系统地分析了层速度误差的特征、性质与主要来源,证明了层速度误差主要是随机性的;以实验说明误差产生的主要原因之一是表层不均匀性和工作因素的不均一性;论证了层速度误差主要取决于叠加速度误差及所采用数据的t_o差值,并进一步讨论了叠加速度误差的八种影响因素。 文章探讨了减小层速度误差的各种可能途径,提出了提高层速度精度应采取的各种根本措施和处理手法,并介绍了提取层速度横向变化信息的简便方法。文中还展示了某试验地区层速度研究的实际处理流程。

PICKINB UP INTERVAL VELOCITY ACCURACY AND THE REGULARITY OF TRANSVERSAL VELOCITY VARIATION

Aiming at the accuracy of interval velocity and integrating with the data available, an investigation is made on the transversal variation of interval velocity. A Systematic analysis is made on the characteristics, nature and the main source of interval velocity error. It is proved that most of the interval velocity errors are stochastic; By experiment, it shows one of the major reasons which might cause the errors is the surface unhomgeneity and nonuniformity of the operating factor; Tt is verified the interval velocity errors depend largely on the stack velocity error and the difference value t0 of data used. Moreover, the eight factors that the stack velocity error arises therefrom are reviewed in a deep going way.On top of that, an approach is made to the possibilities of minimizing the interval velocity error. All possible means of handling as well as the essential measures taken for the sole purpose of trying to obtain a desirable accuracy of interval velocity. And the easy way to get the regularity of interval velocity transversal variation is recommended. Also, the actual processing sequence with respect to the study made on interval velocity at the testing ground is opened up to the readers' eyes.