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A geosteering tool for horizontal well logging

M. I. Epov, V. L. Mironov, K. V. Muzalevskiy, I. N. Eltsov and U. P. Salomatov
A geosteering tool for horizontal well logging
Russian Geology and Geophysics (September 2013) 54 (9): 1103-1107


A theoretical study has been performed to check the possibility of using ultrabroadband nanosecond electromagnetic pulses as a geosteering tool for horizontal drilling to estimate the distance to the oil-water contact (OWC) in a floating oil accumulation. The voltage of a microwave-bandwidth pulse at the dipole receiver of a downhole radar was modeled for the case of a horizontal borehole near OWC in a formation saturated with oil and water. Numerical solutions to the boundary problem formulated on the basis of the Maxwell equations were obtained with the Microwave Studio software ( The frequency-dependent dielectric constants of the layered saturated formation and the drilling fluid were assumed according to experimentally tested models. The modeling has demonstrated that nanosecond electromagnetic pulses arriving from a layered oil-water contact can in principle be acquired and the distance from the wellbore to the OWC median can be inferred from the respective time delays recorded by a downhole radar. Additionally, the possible dynamic range and accuracy of sensing have been estimated.

ISSN: 1068-7971
Serial Title: Russian Geology and Geophysics
Serial Volume: 54
Serial Issue: 9
Title: A geosteering tool for horizontal well logging
Affiliation: Russian Academy of Sciences, Trofimuk Institute of Petroleum Geology and Geophysics, Novosibirsk, Russian Federation
Pages: 1103-1107
Published: 201309
Text Language: English
Publisher: Allerton Press, New York, NY, United States
References: 10
Accession Number: 2021-040108
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Russian Academy of Sciences, Kirensky Institute of Physics, RUS, Russian FederationSiberian Federal University, RUS, Russian Federation
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
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