基于潮位预测的潮汐校正技术的应用

潮汐现象是海上地震勘探中影响地震资料成像精度的重要因素,获取准确的潮位数据是实现精确的潮汐校正处理的关键。目前应用的潮汐校正技术有很多种,但大都存在一定的缺陷,或精度不够,或数值跳变大,不稳定,在实际应用过程中发现较多问题。本文通过利用历年来实测的基本验潮站资料、临时验潮站资料和潮汐调和常数,编制潮位预测软件,获得较高精度的预测潮位数据并将其应用于地震资料处理中的静校正模块,实现了地震资料的潮汐校正。算例结果表明该方法能够准确地预测渤海、南海任意地点、任意时间的潮位数据,将预测潮位数据应用于地震勘探数据的潮汐校正处理,能够取得良好的校正效果。

The Application of Tide Correction Based on Tide Forecasts

In seismic data processing,tide is an important factor which affects the imaging accuracy.How to get precise tide data is the key to tide correction.There are many ways to perform tide correction.However,most have their own flaws such as low precision,instability etc.In this paper,we develop tide prediction software which is based on factual measurement data of tide gauge station from the precious years.By using high-precision tide predicted data acquired through this software,we can implement the tide correction through statics correction module in seismic data processing.The testing results of this technology show that the tide data of Bohai and South China Sea region can be predicted at any time from any place.After that,the predicted tide data are used in tide correction processing,a good result is achieved.