浅海测量导航施工方法

浅海勘探测量同陆地物探测量相比具有显著的不同:首先,运动中的作业环境要求测量定位和地震数据采集必须同步进行;其次,由于水深随着潮汐的涨落而变化,因而要测量检波点和炮点的高程,必须掌握建立验潮站的有关技术.放入海底的电缆、检波器由于潮汐、海流等自然环境的影响产生位移,必须采用二次定位技术确定电缆、检波器的实际位置;第三,由于浅海勘探中的物理点不能重复测量,导航施工的质量监控必须是实时的.这些问题长期以来一直是物探测量理论和方法探索的课题,本文给出了这些问题的解决方案.

Measurement navigation operation method in shallow sea

The measurement in shallow sea exploration is different significantly from land geophysical measurement. Firstly, moving operation environment demands that the measurement positioning must synchronously carry out with seismic data acquisition; secondly, since water depth changes with the ebb and flow of the tide, the measurement of the elevation of both receiver points and shot points should master the corresponding techniques of tide station. The geophone on the cable sunk into sea bottom produced shift because of the influence of such natural environment as tide and ocean current, the practical position of geophone on the cable must be determined by secondary positioning technique; thirdly, since the physical points in the shallow sea exploration cannot be repeatedly measured, the QC of navigation operation should be real time. These issues have always been the probed objects of geophysical measure- ment theory and methods, and the paper gave solved scheme of these issues.