复杂地表地区近地表模型与静校正

Near surface model and static correction in complex surface areas

建立一个合适的近地表模型以及静校正处理流程,较为准确地消除静校正量的影响是复杂地表地区静校正处理的关键。介绍了近地表模型的研究内容以及复杂地表地区近地表模型的研究现状和相关研究成果,分析了获得近地表地层速度的微测井法、折射法、沙丘曲线法和浅层反射法等技术方法的优劣,探讨了近地表模型及静校正的地质和地球物理意义。提出了综合考虑各方面因素,充分利用各种技术,研究、建立合适的近地表模型的建模思路和相关的技术措施。

It is the key of static correction to build a proper near surface model and static correction treatment scheme and exactly eliminate influence of static correction.Research content and relevant technologies of near surface model in complex surface areas are introduced in the paper.Based on the geological,technical and economical basis and utilizing all available data of the area,by means of proper techniques and methods,building a proper near surface model and characterizing the geological structure of weathering layers and low velocity layers are very important for the static correction flow building and correct static calculation.It can decrease the static impact on the seismic data processing,enhance the data processing quality,ensure the correct imaging of the deep layer structure and the precision of the time to depth reversion.