We have developed the high-performance software and algorithmic software for solving the direct and inverse problems of modeling and inversion of spatially distributed magnetic, taking into account the relief. We show the results of solving the inverse problem of magnetic survey taking into account the relief for synthetic noisy data.

A criterion is proposed for a formal assessment of the quality of automatically generated correlation schemes, their ranking and finding the best construction parameters based on leave-one-out cross-validation. The best correlation solution is considered to be one that provides a smaller error in predicting the spatial distribution of petrophysical properties in the sedimentary sequence. The applicability of the criterion was tested on the example of Vendian-Cambrian sections of the Chayandinskoye oil-gas and condensate field in Eastern Siberia.

The vibroseis sources always produce harmonics, which are considered here as noise to be eliminated. An algorithm for removing such noise has been developed based on the previously obtained mathematical model of a vibroseis wavelet distorted by the harmonics. It is shown that the ideal inversion operator is recursive, i.e. is a filter with infinite impulse response. However, due to the peculiarity of the problem, this operator is successfully approximated by a filter with a short impulse response, allowing linearization of the optimization scheme. An objective being the energy of the noise attenuation result is formed. It allows application of the geometrical divergence correction despite the fact that it introduces distortions in the signal shape and the harmonics.

The performance of the algorithm for removing harmonic noise distortions of the vibroseis wavelet on the synthetic and the field data is studied. At the first stage, the noise is predicted. At the second stage, its adaptive subtraction from the original correlograms is performed. The algorithm demonstrates good performance, most clearly its advantages are manifested in slip-sweep data processing.

The article presents the quantitative and qualitative characteristics of a prototype of a seismic non-explosive source with an electromagnetic drive and an assessment of the possibilities of its use during geophysical exploration for oil and gas with increased environmental requirements.