Timofey Presented at the 2018 SEG Anaheim

Timofey Presented at the 2018 SEG Anaheim

10/21/2018
Our post-doctoral fellow, Timofey Eltsov, recently attended the biggest annual meeting of SEG (Society of Exploration Geophysicists) in Anaheim, California on 15-20 October 2018. Timofey presented his current research in the SEG Expanded Absracts Technical Progam entitled "Numerical Simulation of the Magnetic Cement Induction Response in the Borehole Environment, deals with the impact of secondary magnetic fields created by cement on drilling tools, and how to measure them".  

 
Figure. Timofey (left) with Prof. Grechka (right), one of the most well-known geophysicist at the SEG's Annual Meeting 2018 in Anaheim, California

In brief, this research presents a robust technique for the detection of integrity of the magnetic cement behind resistive fiberglass casing. Numerical simulations show that an optimized induction logging tool allows one to detect small changes in the magnetic permeability of cement through a non-conductive casing in a vertical (or horizontal) well. Changes in magnetic permeability influence mostly the real part of the vertical component of magnetic field. The signal attenuation is sensitive to a change of magnetic properties of the cement. Our simulations show that optimum separation between the transmitter and receiver coils ranges from 0.25 to 0.6 meters, and the most suitable magnetic field frequencies vary from 0.1 to 10 kHz. Our goal is to build cheap, long-lasting, low-temperature (<150°C) geothermal wells with water recirculation.
Click here to learn more about Timofey's research.