Supervirtual interferometry (SVI) was developed to significantly enhance the signal-to-noise ratio of noisy first arrivals. However, a time window must be specified that contains these first arrivals, and the window should be no wider than several times the dominant period of the source wavelet. The accurate specification of this window is very challenging for noisy data and involves manual picking. To overcome this problem, we propose to automatically pick these windows via machine learning methods. Convolutional neural network (CNN) and density-based spatial clustering of applications with noise (DBSCAN) are used to distinguish first-arrival signals completely buried in noise. Numerical tests validate that this method can accurately specify the correct window as well as that of a human interpreter. The benefit is an automatic means for picking first-arrival traveltimes in noisy traces from a large 3D data set.
|Original language||English (US)|
|Title of host publication||SEG 2018 Workshop: SEG Maximizing Asset Value Through Artificial Intelligence and Machine Learning, Beijing, China, 17-19 September 2018|
|Publisher||Society of Exploration Geophysicists|
|State||Published - Dec 14 2018|