可控震源“前拉后推”动态滑动扫描的应用

Application of vibroseis “dual-side hyper” dynamic slip-sweep in exploration and acquisition

可控震源滑动扫描是一种高效采集技术,但是占用采集设备数量大。采取"前拉后推"的方法,一个激发点振两次,采集设备使用数量可以减少一半;为提高采集效率,在保证勘探目的层资料不被干扰的前提下,滑动时间随震源距离动态变化,满足同步激发的条件时,实现"两炮同响";在采集生产过程中,可控震源可以"插队"优先采集,确保顺利完成地震数据采集任务。

Vibroseis slip-sweep is an efficient acquisition technique,but it takes enormous acquisition equipment.Taking the"dual-side hyper"method,where an excitation point is vibrated by two times,the number of acquisition equipment used can be reduced by half.In order to improve the acquisition efficiency,under the premise of ensuring that the data of acquisition target layer is not disturbed,the slip time will change dynamically with the vibroseis distance,when the conditions of synchronous excitation is satisfied,"dual-side shooting"will be realized.In the process of acquisition and production,the vibroseis can"jump the queue"for prior acquisition to ensure the successful completion of the geological acquisition task.