Abstract
The seismic exploration method could explore deep metal ore bodies (depth > 1000 m). However, it is difficult to describe the geometry of the complex metal ore body accurately. Seismic full waveform inversion is a relatively new method to achieve accurate imaging of subsurface structures, but its success requires better initial models and low-frequency data. The seismic data acquired in the metal mine area is usually difficult to meet the requirements of full waveform inversion. The passive seismic data usually contains good low frequency information. In this paper, we use both passive and active seismic datasets to improve the full waveform inversion results in the metal mining area. The results show that the multisource seismic full waveform inversion could obtain a suitable result for high-resolution seismic imaging of metal ore bodies.
Highlights
As the demand for metal ores has increased in recent years, discovering new shallow deposits has become increasingly difficult
We generated synthetic passive and active seismic datasets based on the velocity model from a complex metal ore body
The results showed that the multisource seismic full waveform inversion could obtain a suitable result for high-resolution seismic imaging of metal ore bodies
Summary
As the demand for metal ores has increased in recent years, discovering new shallow deposits has become increasingly difficult. Mao et al used the direct wave and the adjoint-state source function inversion method to invert the source wavelet accurately and the similarity phenomenon to reconstruct the low-frequency data for the FWI application in deep metal ore bodies [19]. The joint use of active and passive source data for full waveform inversion in mineral exploration is a novel research topic. We tried to use both passive and active seismic data to improve the FWI results and the imaging quality of the metal ore body. We generated synthetic passive and active seismic datasets based on the velocity model from a complex metal ore body. The results showed that the multisource seismic full waveform inversion could obtain a suitable result for high-resolution seismic imaging of metal ore bodies
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