Normal moveout geophysics definition
Web1 de jun. de 1994 · Abstract. Three geophysical principles are shown to be sufficient to determine the most general, practical normal moveout (NMO) equation. The principles … Web15 de fev. de 2024 · Our stretch-free NMO produces parallel moveout trajectories for primary reflections. Our post-NMO stretch correction calculates the moveout of stretched wavelets as a function of offset. Both methods are based on the generalized moveout approximation and are suitable for application in complex anisotropic or heterogeneous …
Normal moveout geophysics definition
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Web1. n. [Geophysics] A function of time and offset that can be used in seismic processing to compensate for the effects of normal moveout, or the delay in reflection arrival times … WebABSTRACT The normal-moveout (NMO) stretch causes decrease in the dominant frequency of seismic wavelet after conventional NMO correction and severely damages …
http://basin.earth.ncu.edu.tw/download/courses/seminar_MSc/2008/0108-2_Normal%20moveout%20stretch%20mute%20on%20shallow-reflection%20data.pdf Webt 2 ( x) = t 0 2 + x 2 v s t 2. where v s t is a “stacking” velocity, or sometimes called the Normal Moveout Velocity, v n m o. For each reflection event hyperbola, perform a velocity analysis to find v s t. This is done by first …
WebThree geophysical principles are shown to be sufficient to determine the most general, practical normal moveout (NMO) equation. The principles are reciprocity in a common … WebA proper normal moveout stretch mute can reduce distortion of reflection wavelet spectra caused by nonvertical incidence recording to less than 10 percent. Stretched reflection wavelets improperly muted can be misinterpreted on CDP stacked sections as stacked refractions or subtle stratigraphic features. back
WebA theory of normal moveout. Geophysics 59: 983-999. (1994) for reflection time computation. We show that even when the medium presents anisotropy it is possible to estimate a consistent NMO velocity model without the knowledge of the anisotropic parameters of the medium, with better results than the conventional approach.
WebNMO. 1. n. [Geophysics] The effect of the separation between receiver and source on the arrival time of a reflection that does not dip, abbreviated NMO. A reflection typically arrives first at the receiver nearest the source. The offset between the source and other receivers induces a delay in the arrival time of a reflection from a horizontal ... bit of light readingWebNormal moveout (NMO) correction is routinely applied to traces of each common-midpoint (CMP) gather before forming a stack section. Conventional NMO correction has the drawback of producing stretching as a natural result of convergence of the NMO trajectories. bit of lotionWebThe normal moveout difference, or the residual normal moveout between the primary and the multiple reflections, are used in studying multiple reflection cancellation and … data gathering instrument meaningWebThe normal moveout depends on velocity above the reflector, offset, two-way zero-offset time associated with the reflection event, dip of the reflector, the source-receiver azimuth … data gathering instrument sampleWebnormal moveout. 1. n. [Geophysics] The effect of the separation between receiver and source on the arrival time of a reflection that does not dip, abbreviated NMO. A reflection … bit of limboWeb12 de ago. de 2024 · Here we look at the normal moveout approximation often cited in many texts. We use additional terms in a Taylor series expansion to examine this … bit of lotion crossword clueWeb6 de out. de 2024 · Normal Moveout this is the formulation to calculate how a record from a different angle can be shifted to be in line with another record for the aforementioned stacking. As you can imagine the records that have longer ray paths take longer, depending on the velocity of the rock they travel through. bit of luck