基于线性动校正的海上定位数据与地震数据质控技术  

Quality control technology for offshore positioning data and seismic data based on linear motion correction

作　　者：封楞楞 韩佳琛 张进松 李慧龙 陈昀 赵明 FENG Lengleng;HAN Jiachen;ZHANG Jinsong;LI Huilong;CHEN Yun;ZHAO Ming(Geophysical Exploration Division,China Oilfield Services Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海油服物探事业部,天津300459

出　　处：《石油地质与工程》2025年第1期52-57,共6页Petroleum Geology and Engineering

摘　　要：随着勘探技术的不断进步,勘探方式日益丰富,海上地震资料采集方式也越来越复杂,海底电缆和海底节点地震资料采集因其灵活多变的施工方式而备受青睐,在海底电缆与海底节点地震资料采集过程中,线性动校正是检查近偏移距定位数据的一种常用方法。在生产过程中,通过拾取线性动校正对应不同炮点的起跳时间,计算出不同炮点对应的偏移距,利用偏移距和炮点坐标重新计算检波点的真实坐标,称为初至波二次定位;当定位数据准确时,初至波的同向轴会被校正到一个固定的位置,一旦采集系统不同步,同向轴位置也会发生时移,可通过初至波同向轴是否发生时移质控采集系统的同步性;线性动校正数据选取的大部分为直达波数据,能量强、波形稳定,选取固定时窗的线性动校正数据绘制饼状图,可用于检查检波器的极性是否正确。With the continuous progress of exploration technology,exploration methods are becoming abundant,and marine seismic data acquisition methods are becoming more complex.Seismic data acquisition of submarine cables and nodes is highly favored due to its flexible and versatile construction methods.Linear motion correction is a commonly used method for checking near offset positioning data in the seismic data acquisition process of submarine cables and nodes.During the production process,the offset corresponding to different shot points is calculated by picking up the linear motion correction corresponding to the jump time of different shot points,and the real coordinate of the detection point is recalculated by using the offset and shot point coordinates,which is called the first arrival wave secondary positioning.When the positioning data is accurate,the simultaneous axis of the first arrival wave is corrected to a fixed position.Once the acquisition system is not synchronized,the position of the same direction axis will also occur time shift,and the synchronization of the acquisition system can be controlled by whether the time shift occurs in the same direction axis of the first arrival wave.Most of the linear motion correction data selected are direct wave data with strong energy and stable waveform.The linear motion correction data with fixed time window is selected to draw pie chart,which can be used to check whether the polarity of the detector is correct.

关 键 词：线性动校正 偏移距 同步性 初至波 

分 类 号：P631.46[天文地球—地质矿产勘探]