逆时偏移角道集速度分析方法研究与实现  

The research and implementation of velocity analysis methods for reverse time migration angle-gather

作　　者：王保利 高静怀 Wang Bao-Li;Gao Jing-Huai(CCTEG Xi'an Research Institute(Group)Co.,Ltd,Xi’an 710077,China;Beijing Center for Mathematics and Information Interdisciplinary Science,Beijing 100048,China;Xi’an Jiaotong University,Xi’An 710049,China)

机构地区：[1]中煤科工集团西安研究院有限公司,西安710077 [2]北京数学与信息交叉科学协同创新中心,北京100048 [3]西安交通大学,西安710049

出　　处：《Applied Geophysics》2024年第2期279-288,419,420,共12页应用地球物理（英文版）

基　　金：supported by special fund for research institutes supplied the National Key Research and Development Project(2018YFC0807804);the General Program of National Natural Science Foundation of China(42074175);the Project Supported by Natural Science Basic Research Plan in Shaanxi Province of China(2020JM-714,2020JQ-741,2021JQ-949).

摘　　要：与其它成像方法相比,逆时偏移能明显提高复杂介质的成像质量,但是它对速度模型的准确性要求也比其它方法高。作为一种重要的叠前偏移输出,共成像点道集除了能为深度偏移处理提供速度信息外,还可提供振幅和相位信息,同时还能为后续的属性解释提供依据。本文推导了角道集速度分析的公式,重点分析了该公式的特征、稳定性和速度敏感性等,为后续速度分析提供理论依据;给出了逆时偏移角道集人机交互速度分析的具体实现流程。模型数据和实际数据测试结果表明,本文给出的逆时偏移角道集人机交互速度分析方法具有实用性,能够得到较好的背景速度模型。Reverse time migration can improve the imaging quality of complex medium evidently,compared with other imaging methods,but it requires higher conditions than others to the accuracy of velocity models.In addition to providing the information of velocity for depth migration,as an important prestack migration output,common imaging gather also can provide the information of amplitude and phase;at the same time,it provides a basis for subsequent explanation of attributes.We derive the formula for angle-gather velocity analysis,and focus on the analysis of the characteristics,stability,and velocity sensitivity of the formula,etc.that provide a theoretical basis for the analysis of the following speed.We give the specific implementation process of human-computer interaction velocity analysis for reverse time migration angle-gather.The test results of model data and actual data show that the human-computer interaction velocity analysis methods for reverse time migration angle-gather,that we provide,are practical,and can get a better background velocity model.

关 键 词：逆时偏移 角道集 速度分析 人机交互 

分 类 号：P631.4[天文地球—地质矿产勘探]