二维叠前深度偏移技术在新疆塔北地区的应用

Application of 2-D prestack depth migration technique to the northern Tarim Basin

中国新星石油公司西北石油局规划设计院,乌鲁木齐830011

Institute of Planning and Design, Northwest Petroleum Bureau, Urumqi 830011

基于引进软件GeoDenth的工作原理和常规处理流程．针对塔里木盆地北部地区地震勘探目的层埋藏深、速度横向变化大的特点, 经过反复试验, 摸索出了一套适合塔北地区二维地震资料的叠前深度偏移处理流程。经该处理流程得到的叠前深度偏移剖面和相关资料对地下构造形态和速度场变化规律反映得更清楚, 为圈闭落实和井位部署提供了依据。

In the northern Tarim Basin. the layers of interest have a large burial depth andlateral velocity change. In view of this characteristics, the authors propose a processing sequenceof 2-D prestack depth migration, based on the principle and basic processing sequence of theGeoDepth software. The prestack depth migration sections and relavant data obtained using thisprocessing sequence reflect the subsurface structural shape and the velocity field change moreclearly. These results provide a basis for trap ascertaining and well position disposition.