静校正对波动方程叠前深度偏移成像效果的影响研究  

Study Effect of Static Correction on Deep Offset Imaging Effect of Wave Equation

作　　者：张志立[1] 焦艳艳[1] 王海峰 Zhang Zhili;Jiao Yanyan;Wang Haifeng(SINOPEC Geophysical Research Institute,Nanjing Jiangsu 211103;SINOPEC EAST Development Geophysical Research Institute,Nanjing Jiangsu 211103)

机构地区：[1]中国石油化工股份有限公司石油物探技术研究院,江苏南京211103 [2]中石化华东分公司物探院,江苏南京211103

出　　处：《石化技术》2022年第6期145-147,共3页Petrochemical Industry Technology

摘　　要：针对静校正对波动方程叠前深度偏移成像影响的问题,本次研究首先对影响静校正的因素进行系统分析,在此基础上,开展静校正对波动方程叠前深度偏移成像效果的影响研究,为提高叠前深度偏移成像的效果奠定基础。研究表明:在高速顶的深度相对较小时,代替速度与近地表速度之间的数值相对较为接近,在使用静校正技术以后,数据的偏移处理结果与模型的分析结果基本相同,在使用高精度近地表速度模型的过程中,可以更加准确地确定替换速度,同时,还可以更加准确地拾取高速层顶。另外,如果可以通过反演的方式得到精度相对较高的近地表模型,此时就不需要进行静校正,只需要将近地表模型应用到深度偏移速度模型中即可,但是整个实现过程相对较为复杂。Aiming at the influence of static correction on the influence of depth offset imaging imaging in the wave equation,this study first analyzes the factors affecting the static correction.On this basis,the static correction depth offset imaging The effects of effects have laid the foundation for the effect of improving the pre-stack depth offset imaging.Studies have shown that when the depth of the high speed is relatively small,the value between the replacement speed and the near-surface speed is relatively close.After using the static correction technique,the offset processing result of the data is basically the same as the analysis of the model,which is used.In the process of accuracy,the replacement speed can be determined more accurately,and it can also pick up the high-speed layer top at the same time,at the same time,if the inversion can be obtained,the relatively high surface model of accuracy is obtained,at this time There is no need to make a quiet correction,just need to apply near surface models to the depth offset speed model,but the entire implementation process is relatively complicated.

关 键 词：静校正 波动方程 叠前深度 偏移成像 替代速度 

分 类 号：P631.4[天文地球—地质矿产勘探]