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One Person’s Regional Is Another Person's Residual

P. S. Millegan
P. S. Millegan
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January 01, 1998


A “regional” is what you remove from the data to better image what you want to “see” (residual). The best regional/residual combination is achieved by applying geologic thought to the problem. What is the geologic target? The hypothetical curve represented below illustrates the residualization concept, the idea of zeroing in on a particular anomaly or wavelength, simplifying the profile and, hopefully, the interpretation. If your goal is a better understanding of the asthenosphere, you may want to capture the very long wavelength blue anomaly. The red anomaly may shed light on crustal thinning, while the green anomaly relates to basin depth. The short-wavelength orange anomaly may be caused by the hydrocarbon trapping structure.

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Society of Exploration Geophysicists Geophysical References Series

Geologic Applications of Gravity and Magnetics: Case Histories

Richard I. Gibson
Richard I. Gibson
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Patrick S. Millegan
Patrick S. Millegan
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Society of Exploration Geophysicists
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Publication date:
January 01, 1998




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