海上规律性不明干扰源精确定位方法--以南黄海某工区为例

The Precise Positioning Method of Regular Unknown Interference Source in Marine Seismic Acquisition--A Case Study in a Work Area of South Yellow Sea

海上地震采集实施时,干扰源产生的规律性干扰对地震资料品质和作业效率将产生严重的影响,因此,采集时快速定位干扰源的位置十分必要。以南黄海某区域地震采集所遇的不明干扰为例,通过干扰在不同电缆、同一电缆不同位置的干扰强度、接收顺序的分析,结合几何学推导,形成了现场干扰源位置快速定位方法。该方法为作业现场及时发现干扰源并消除该类干扰提供了手段,适用于拖缆、OBS等海上多缆三维地震采集中干扰源的定位,对提高现场采集作业效率、获取高品质地震资料具有重要意义。

During the marine seismic acquisition,regular interference generated by the interference source has a serious effect on the quality of the seismic data and operating efficiency.Therefore,it is necessary to position the interference source quickly.In this paper,in the case of unknown interference of marine seismic acquisition in a work area of South Yellow sea,fast positioning method of interference source was formed by the analysis of the interference in different cables,the interference strength in different positions of the same cable and the receiving order,combined with geometric derivation.This method provides a means to find out timely and eliminate the interference source and can apply to positioning interference source in the marine multi cable 3Dseismic acquisition of towing and OBS.It has a great significance to enhance the acquisition efficiency and the quality of seismic data.