GEORADAR STUDIES OF GROUND ICE IN THE COMPLEX OF ENGINEERING AND GEOLOGICAL SURVEYS
D.V. Kopylov1,2, M.R. Sadurtdinov2, S.Yu. Yanin1
1Tyumen Petroleum Research Center, P/O box 747, Tyumen, 625000, Russia
2Earth Cryosphere Institute, Tyumen Scientific Centre SB RAS, Malygina str. 86, Tyumen, 625026, Russia
Keywords: attribute analysis, ground-penetrating radar, engineering and geological surveys, cryolithozone, ice-ground
Abstract
The results of ground-penetrating radar studies in the complex of engineering and geological surveys at the design site of the cluster site of an oil and gas field in an area with a continuous spread of permafrost soils are considered. Drilling of geological wells with core sampling have revealed the presence of an ice ground lens with an ice content of up to 90 %. Comparison of the drilling results and the characteristic wave pattern on the ground-penetrating radar sections have allowed us to identify the area of abnormal changes in soil properties, which is interpreted as an ice-ground lens. High-amplitude diffractions of an electromagnetic wave are distinguished at the “ice-ground-peat” boundary, which, according to the authors, are due to the presence of wedge ice bodies. The lens of the ice ground has been contoured and its approximate volume has been calculated with the help of attribute analysis.
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