A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data
Wang Wan-Yin1, Pan Yu2, and Qiu Zhi-Yun1
1. College of Geology Engineering and Geomatics, Key Laboratory of Western China’s Mineral Resources and Geological Engineering, Ministry of Education, Chang’an University, Xi’an 710054, China.
2. Petroleum Exploration and Development Research Institute, PetroChina Changqing Oilfield Company, Xi’an 710021, China.
Abstract Edge detection and enhancement techniques are commonly used in recognizing the edge of geologic bodies using potential field data. We present a new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative which has the functions of both edge detection and enhancement techniques. First, we calculate the total horizontal derivative (THDR) of the potential-field data and then compute the n-order vertical derivative (VDRn) of the THDR. For the n-order vertical derivative, the peak value of total horizontal derivative (PTHDR) is obtained using a threshold value greater than 0. This PTHDR can be used for edge detection. Second, the PTHDR value is divided by the total horizontal derivative and normalized by the maximum value. Finally, we used different kinds of numerical models to verify the effectiveness and reliability of the new edge recognition technology.
This work is supported by the National Science and Technology Major Projects (2008ZX05025) and the Project of National Oil and Gas Resources Strategic Constituency Survey and Evaluation of the Ministry of Land and Resources, China (XQ-2007-05).
Cite this article:
WANG Wan-Yin,PAN Yu,QIU Zhi-Yun. A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J]. APPLIED GEOPHYSICS, 2009, 6(3): 226-233.
[1]
Cooper, G. R. J., and Cowan, D. R., 2008, Edge enhancement of potential-field data using normalized statistics: Geophysics, 73(3), H1 - H4.
[2]
Cordell, L., 1979, Gravimetric expression of graben faulting in Santa Fe Country and the Espanola Basin, New Mexico: New Mexico Geol. Soc. Guidebook, 30th Field Conf., 59 - 64.
[3]
Cordell, L., and Grauch, V. J. S., 1985, Mapping basement magnetization zones from aeromagnetic data in the San Juan Basin, New Mexico: in Hinze, W. J., Ed., The utility of regional gravity and magnetic anomaly maps: Soc. Explor. Geophys., 181 - 197.
[4]
Grauch, V. J. S., and Cordell, L., 1987, Limitations of determining density or magnetic boundaries from the horizontal gradient of gravity or pseudogravity data: Geophysics, 52(1), 118 - 121.
[5]
Hood, P. J., and Teskey, D. J., 1989, Aeromagnetic gradiometer program of the Geological Survey of Canada: Geophysics, 54(8), 1012 - 1022.
[6]
Nabighian, M. N., 1972, The analytic signal of two-dimensional magnetic bodies with polygonal cross-section: its properties and use for automated anomaly interpretation: Geophysics, 37(3), 507 - 517.
[7]
Nabighian, M. N., 1984, Toward a three dimensional automatic interpretation of potential field data via generalized Hilbert transforms: Fundamental relations: Geophysics, 49(6), 780 - 786.
[8]
Miller, H. G.., and Singh, V., 1994, Potential field tilt-a new concept for location of potential field sources: Journal of Applied Geophysics, 32, 213 - 217.
[9]
Roest, W. R., Verhoef, J., and Pilkington, M., 1992, Magnetic interpretation using the 3-D analytic signal: Geophysics, 57(1), 116 - 125.
[10]
Verduzco, B., Fairhead, J. D., and Green, C. M., and Mackenzie, C. 2004, The meter reader—new insights into magnetic derivatives for structural mapping: The Leading Edge, 23, 116 - 119.
[11]
Wijns, C., Perez, C., and Kowalczyk, P., 2005, Theta map: Edge detection in magnetic data: Geophysics, 70(4), L39 - L43.
[12]
Zhou,D., Wang,W. Y., Wang, J. L., Pang,X., Cai,D. S., and Sun,Z., 2006, Mesozoic subduction-accretion zone in northeastern South China Sea inferred from geophysical interpretations: Science in China: Science in China Series D: earth Sciences,, 49(5), 471 - 482.
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