TY - GEN

T1 - Electromagnetic sounding with a toroidal source in vertical and deviated oil wells: numerical simulation

AU - Mikhaylov, I.

AU - Glinskikh, V.

AU - Nikitenko, M.

AU - Surodina, I.

N1 - Funding Information: This research was supported by the Russian Foundation for Basic Research, project No. 19-05-00595. Publisher Copyright: © EAGE Conference and Exhibition 2021.All right reserved.

PY - 2021

Y1 - 2021

N2 - The research is focused on examining the capabilities of an unconventional electromagnetic source, namely a toroidal coil, with regard to logging vertical and deviated oil wells. With the application of the developed and software-implemented high-performance algorithms, we carried out a large-scale multidimensional finite-difference numerical simulation of the signals of two-coil sounding systems with a toroidal source and receiver in geoelectric models with various degrees of complexity, including thinly laminated macroanisotropic sandstone-shale reservoirs. It was concluded that the measurements of the various electromagnetic field components are independent and complement each other informationally. The numerical simulation enabled selecting the optimal parameters of the sounding systems with toroids – the ranges of the probe lengths and frequencies, which provide a sufficient level of the measured signals, high sensitivity to the reservoir boundaries and deviation angle, and an unambiguous relationship with the resistivity anisotropy coefficient. Moreover, the developed algorithms are a basis for creating fast inversion procedures that enable real-time processing of the electromagnetic responses from a toroidal source in oil wells with different trajectories.

AB - The research is focused on examining the capabilities of an unconventional electromagnetic source, namely a toroidal coil, with regard to logging vertical and deviated oil wells. With the application of the developed and software-implemented high-performance algorithms, we carried out a large-scale multidimensional finite-difference numerical simulation of the signals of two-coil sounding systems with a toroidal source and receiver in geoelectric models with various degrees of complexity, including thinly laminated macroanisotropic sandstone-shale reservoirs. It was concluded that the measurements of the various electromagnetic field components are independent and complement each other informationally. The numerical simulation enabled selecting the optimal parameters of the sounding systems with toroids – the ranges of the probe lengths and frequencies, which provide a sufficient level of the measured signals, high sensitivity to the reservoir boundaries and deviation angle, and an unambiguous relationship with the resistivity anisotropy coefficient. Moreover, the developed algorithms are a basis for creating fast inversion procedures that enable real-time processing of the electromagnetic responses from a toroidal source in oil wells with different trajectories.

UR - http://www.scopus.com/inward/record.url?scp=85127786641&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85127786641

T3 - 82nd EAGE Conference and Exhibition 2021

SP - 1687

EP - 1691

BT - 82nd EAGE Conference and Exhibition 2021

PB - European Association of Geoscientists and Engineers, EAGE

T2 - 82nd EAGE Conference and Exhibition 2021

Y2 - 18 October 2021 through 21 October 2021

ER -