Выпуск: 2 , Том: 14 , Год издания: 2021

This paper is devoted to the development of a fundamental theory and the creation of algorithms and software for pulsed electromagnetic soundings to study an unconventional source of hydrocarbons with hard-to-recover reserves - the Bazhenov formation. A new geophysical technology for the localization of oil-prospective zones using a spatially distributed system of highly deviated and horizontal wells is mathematically substantiated. To perform a fast mathematical simulation, a solution is obtained to the problem of pulsed electromagnetic soundings in layered homogeneous models of media for an arbitrary current pulse in an electromagnetic field source. This solution allows deep parallelization. Based on the thus created computational algorithm, a parallel algorithm and a fast computer program are developed for the numerical simulation of the signals of a new system on the multiprocessor computers of the Siberian Supercomputer Center of SB RAS. A large-scale numerical simulation and analysis of the signals in realistic geoelectric models of the Bazhenov formation are performed to determine the scope of application of the new pulsed electromagnetic sounding setup. The calculations show that the spatial locations of the formation boundaries can be determined in well logging over a wide range of sonde spacing. We analyze the applicability of the diagonal and off-diagonal field components to ensure high sensitivity of mapping to the reservoir boundaries and evaluating its internal heterogeneities. The results form a basis for the design of the optimal configuration of a new electromagnetic sounding system.