基于Hartley变换的归一化总梯度法

doi:10.13278/j.cnki.jjuese.20180274

吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (3): 830-836.doi: 10.13278/j.cnki.jjuese.20180274

基于Hartley变换的归一化总梯度法

张雅晨^1,2, 刘财^1,2, 陈光宇³

1. 吉林大学地球探测科学与技术学院, 长春 130026;
2. 国土资源部应用地球物理重点实验室, 长春 130026;
3. 中石化东北油气分公司科技信息部, 长春 130062

收稿日期:2018-10-29 出版日期:2019-06-03 发布日期:2019-06-03
通讯作者: 陈光宇(1982-),男,助理研究员,长期从事地球物理资料处理解释工作,E-mail:4432121@qq.com E-mail:4432121@qq.com
作者简介:张雅晨(1986-),女,工程师,博士研究生,主要从事勘探地球物理数据处理研究,E-mail:zhangyachen@jlu.edu.cn
基金资助:
国家自然科学基金项目（41430322）

Normalized Total Gradient Method Based on Hartley Transform

Zhang Yachen^1,2, Liu Cai^1,2, Chen Guangyu³

1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
2. Key Laboratory of Applied Geophysics, Changchun 130026, China;
3. Information and Technology Department, Northeast Oil and Gas Branch Sinopec, Changchun 130062, China

Received:2018-10-29 Online:2019-06-03 Published:2019-06-03
Supported by:
Supported by National Natural Science Foundation of China (41430322)

摘要/Abstract

摘要： 归一化总梯度法对下半空间的重力总梯度模进行归一化计算，从而利用极值来获得地质体的分布，但现有计算方法存在计算精度较低的问题，并且计算结果不太稳定。本文采用Hartley变换，并引入新的余弦滤波因子，实现重力归一化总梯度，来压制高频干扰；此外，针对计算过程中下延深度越大干扰越严重的弊端，将余弦滤波因子的幂次设计为随深度变化的函数，从而获得更加稳定的计算结果。模型试验和在玲珑金矿区采空区的实际数据结果表明，所提出的重力归一化总梯度法具有计算速度快、精度高、稳定性强等优点。

关键词: 归一化总梯度, Hartley变换, 余弦滤波因子, 幂次

Abstract: The normalized total gradient method is a normalized calculation of the gravity total gradient mode in the lower half space, and its extreme value is used to obtain the distribution of geological bodies. The existing calculation methods have the disadvantages of low calculation accuracy and unstable results. In this study, the Hartley transform is used to realize the normalized total gradient of gravity, and a new cosine filter factor is introduced to suppress high frequency interference. In addition, the power of the cosine filter factor is designed to overcome the serious interference of deeper calculation depth,which is a function of the depth,and leads to more stable calculation results. The model test and actual data in Linglong Goldfield show that the proposed gravity normalized total gradient method has the advantages of fast calculation, high precision and strong stability, and has a good practical application value.

Key words: normalized total gradient, Hartley transform, cosine filter factor, power

中图分类号:

P631.1

张雅晨, 刘财, 陈光宇. 基于Hartley变换的归一化总梯度法[J]. 吉林大学学报(地球科学版), 2019, 49(3): 830-836.

Zhang Yachen, Liu Cai, Chen Guangyu. Normalized Total Gradient Method Based on Hartley Transform[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(3): 830-836.

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基于Hartley变换的归一化总梯度法

Normalized Total Gradient Method Based on Hartley Transform

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