3D receiver-domain full traveltime inversion A new method of receiver-domain full traveltime inversion (FTI) is proposed to estimate the near-surface velocity model using the early arrivals of seismic... L Liu,Y He,Y Luo - Society of Exploration Geophysicists International Exposition & Meeting ...
To overcome this problem, we have developed a new wave-equation-based traveltime inversion methodology, referred to as full-traveltime (i.e., fully dependent on traveltime) inversion (FTI), to automatically estimate a kinematically accurate velocity model from seismic data. The key idea of FTI...
So fast does light travel that we can hardly imagine its speed. 光速很快,我们几乎没法想像它的速度。So sudden was the attack that we had no time to escape. 袭击来得非常突然,我们来不及逃跑。 由not only…but also引出的倒装当not only…but also位于句首引出句子时,not only 后的句子通常用...
To avoid cycle skipping, we discovered a new wave-equation reflection traveltime inversion (WERTI) to update the low-wavenumber component of the velocity model, while using FWI to only update high-wavenumber details of the model. We implemented the low-and high-wavenumber inversions in an ...
Application of a new 2D time-domain full-waveform inversion scheme to crosshole radar data Crosshole radar tomography is a useful tool in diverse investigationsin geology, hydrogeology, and engineering. Conventional tomogramsprovided by standard ... JR Ernst,AG Green,H Maurer,... - 《Geophysics》 ...
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Full-waveform inversion (FWI) has the potential to be a game changer for the seismic industry since it produces accurate velocity models at a resolution that cannot be matched by conventional traveltime tomography, with the additional advantage that it runs on basically raw data. Today, these two...
Velocity errors from shallow to deep can lead to misfits of travel-time and their accumulations. The accurate inversion of shallow velocity can efficiently reduce the misfits of travel-time and the cycle-skipping phenomenon in the inversion of later waveforms. Applying the time-damping approach to...
In this abstract, we discuss some fundamental issues of full waveform inversion (FWI). We believe that a successful waveform inversion should emphasize traveltime information and downplay the role of amplitude information. This is achieved by using an objective function that measures the cross-correla...
There are two time-lapse inversion strategies for performing the time-lapse inversion: a sequential difference strategy and a double difference strategy [29,30]. The main difference between the two strategies is that the double difference strategy reduces the influence of the non-target area and im...