全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

位场垂向梯度最佳自比值的边界检测技术

DOI: 10.6038/cjg20130732, PP. 2463-2472

Keywords: 梯度算法,边界检测,噪声干扰,垂向梯度,最佳自比值

Full-Text   Cite this paper   Add to My Lib

Abstract:

位场梯度换算在地质体边界检测中有着重要的应用.但传统的梯度算法易受干扰影响,计算稳定性差,且很难在复杂的叠加异常中识别出小型地质体的边界.鉴于此,本文给出了自比值的定义,提出了能够处理高阶导数的位场垂向梯度最佳自比值的边界检测方法,阐述了方法的数学含义和物理意义.模型试验表明,垂向梯度最佳自比值算法不仅计算稳定性强,而且能清晰地检测出传统梯度算法无法检测的模型体边界.在地质条件复杂的鸭绿江盆地的重力异常实例应用中,垂向三阶导数最佳自比值计算结果识别出的构造边界与实际地质体分布有着较好的对应关系,这不但与前人的工作成果互为佐证,而且自比值圈定的负异常分布区能较好地反映出浑江煤田的工作范围.

References

[1]  王万银, 邱之云, 杨永等. 位场边缘识别方法研究进展. 地球物理学进展, 2010, 25(1): 196-210. Wang W Y, Qiu Z Y, Yang Y, et al. Some advances in the edge recognition of the potential field. Progress in Geophys. (in Chinese), 2010, 25(1): 196-210.
[2]  Evjen H M. The place of the vertical gradient in gravitational interpretations. Geophysics, 1936, 1(1): 127-136.
[3]  Cordell L. Gravimetric expression of graben faulting in Santa Fe Country and the Espanola Basin. New Mexico: New Mexico Geol. Soc. Guidebook, 30th Field Conf., 1979: 59-64.
[4]  Miller H G, Singh V. Potential tilt—A new concept for location of potential field sources. Journal of Applied Geophysics, 1994, 32(2-3): 213-217.
[5]  Verduzco B, Fairhead J D, Green C M, et al. New insights into magnetic derivatives for structural mapping. The Leading Edge, 2004, 23(2): 116-119.
[6]  Wijns C, Perez C, Kowalczyk P. Theta map: edge detection in magnetic data. Geophysics, 2005, 70(4): 39-43.
[7]  Thompson D T. EULDPH: A new technique for making computer-assisted depth estimates from magnetic data. Geophysics, 1982, 47(1): 31-37.
[8]  Reid A B, Allsop J M, Granser H, et al. Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics, 1990, 55(1): 80-91.
[9]  Hansen R O, Laura S. Multiple-source Euler deconvolution. Geophysics, 2002, 67(2): 525-535.
[10]  杨高印. 位场数据处理的一项新技术——小子域滤波法. 石油地球物理勘探, 1995, 30(2): 240-244. Yang G Y. A new technique for potential-field data processing: small subdomain filtering. Oil Geophysical Prospecting (in Chinese), 1995, 30(2): 240-244.
[11]  Cooper G R J, Cowan D R. Edge enhancement of potential-field data using normalized statistics. Geophysics, 2008, 73(3): 1-4.
[12]  王彦国, 王祝文, 张凤旭等. 基于均方差比归一化垂向梯度法的位场边界检测. 中国石油大学学报 (自然科学版), 2012, 36(2): 86-90. Wang Y G, Wang Z W, Zhang F X, et al. Edge detection of potential field based on normalized vertical gradient of mean square error ratio. Journal of China University of Petroleum (Edition of Natural Science), 2012, 36(2): 86-90.
[13]  张恒磊, 刘天佑, 杨宇山. 各向异性标准化方差计算重磁源边界. 地球物理学报, 2011, 54(7): 1921-1927. Zhang H L, Liu T Y, Yang Y S. Calculation of gravity and magnetic source boundary based on anisotropy normalized variance. Chinese J. Geophys. (in Chinese), 2011, 54(7): 1921-1927.
[14]  张凤旭, 张凤琴, 刘财等. 断裂构造精细解释技术——三方向小子域滤波. 地球物理学报, 2007, 50(5): 1543-1550. Zhang F X, Zhang F Q, Liu C, et al. A technique for elaborate explanation of faulted structures: three-directional small subdomain filtering. Chinese J. Geophys. (in Chinese), 2007, 50(5): 1543-1550.
[15]  孟小红, 刘国锋, 陈召曦等. 基于剩余异常相关成像的重磁物性反演方法. 地球物理学报, 2012, 55(1): 304-309. Meng X H, Liu G F, Chen Z X, et al. 3-D gravity and magnetic inversion for physical properties based on residual anomaly correlation. Chinese J. Geophys. (in Chinese), 2012, 55(1): 304-309.
[16]  Cooper G R J. Balancing images of potential-field data. Geophysics, 2009, 74(3): L17-L20.
[17]  张凤旭, 张兴洲, 张凤琴等. 中国东北地区重力场研究——利用改进的三方向小子域滤波划分主构造线及大地构造单元. 地球物理学报, 2010, 53(6): 1475-1485. Zhang F X, Zhang X Z, Zhang F Q, et al. Study of gravity field in Northeastern China area: Classification of main structure lines and tectonic units using the improved three-directional small subdomain filtering. Chinese J. Geophys. (in Chinese), 2010, 53(6): 1475-1485.
[18]  高光珠, 李忠武, 余理富等. 归一化互相关系数在图像序列目标检测中的应用. 计算机工程与科学, 2005, 27(3): 38-40. Gao G Z, Li Z W, Yu L F, et al. Application of the normalized cross correlation coefficient in image sequence object detection. Computer Engineering and Science (in Chinese), 2005, 27(3): 38-40.
[19]  曾华霖, 许德树. 最佳向上延拓高度的估计. 地学前缘, 2002, 9(2): 499-504. Zeng H L, Xu D S. Estimation of optimum upward continuation height. Earth Science Frontiers (in Chinese), 2002, 9(2): 499-504.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133