High fidelity denoising technology for vibrator in Shunzhong Desert of Tarim Basin

The surface sand dunes in the Shunzhong Desert area are huge, and there is usually serious high-energy black triangle noise after being excited by a controllable seismic source in this area. Conventional denoising methods generally cannot achieve good results. Starting from the study of the mechanism of noise generation in controllable seismic sources, it is analyzed that the main causes of noise generation in controllable seismic sources are surface scattering waves and harmonic generation in controllable seismic sources. A "black triangle" suppression method based on curved wave transformation is proposed to effectively suppress the strong energy generated by the controllable seismic source in response to the characteristics of noise; At the same time, a weak signal recovery method based on SVD has been developed, which can further recover weak signals from low signal-to-noise ratio controllable seismic data and effectively improve the signal-to-noise ratio of geological data, forming a set of high fidelity noise reduction techniques for controllable seismic sources. And the technology was applied to the reprocessing process of a certain project in Shunzhong, resulting in significant improvement in the reprocessed profile and significantly improved imaging effects of fractures and fault solution bodies.