Study of denoising method for nonhyperbolic prestack seismic reflection data
作者：GOU Fuyan,LIU Yang,ZHANG Peng
摘要：Removing random noise in seismic data is a key step in seismic data processing. A failed denoising may introduce many artifacts, and lead to the failure of final processing results. Seislet transform is a wavelet-like transform that analyzes seismic data following variable slopes of seismic events. The local slope is the key of seismic data. An earlier work used traditional normal moveout(NMO) equation to construct velocity-dependent(VD) seislet transform, which only adapt to hyperbolic condition. In this work, we use shifted hyperbola NMO equation to obtain more accurate slopes in nonhyperbolic situation. Self-adaptive threshold method was used to remove random noise while preserving useful signal. The synthetic and field data tests demonstrate that this method is more suitable for noise attenuation.
發文機構：College of Geo-Exploration Science and Technology College of Mining Engineering
關鍵詞：VD-seislettransformDENOISINGSELF-ADAPTIVETHRESHOLDmethodH-curve
分類號： P631.44[天文地球—地質礦產勘探][天文地球—地質學]
- Application of isolation forest to extract multivariate anomalies from geochemical exploration data
- Zircon U-Pb geochronology and geochemistry of granite in Huoluotai area of northern Great Hinggan Range
- Geochronology and geochemistry of Baicaogou tuff in Yanji,NE China and its tectonic implications for Early Cretaceous
- Application of high-density resistivity method for assessing construction safety of Shimodong tunnel in Helong City of Jilin Province
- Computation of waves scattered by inhomogeneous velocity gradient using generalized Born approximation
- Combination of structure tensor and tilt angle in the edge detection of potential field data
- Method for predicting cuttings transport using artificial neural networks in foam drilling
- Logging interpretation method for reservoirs with complex pore structure in Mesozoic-Cenozoic faulted basin around Daqing exploration area
- Structure analysis of shale and prediction of shear wave velocity based on petrophysical model and neural network
- Geochronology,geochemistry and geological significance of Early Cretaceous volcanic rocks from Niangniangshan Formation,Ningwu Basin,middle and lower reaches of the Yangtze River