Аннотация:Abstract—West Siberia is an important base for oil and gas production. Usually, the field facilities are constructed on bulk soils that violate the thermal regime of rocks and cause the development of various engineering and geological processes and phenomena. The results of determining the thermophysical characteristicsof bulk soils selected at four fields in West Siberia are presented. Thermotechnical calculations have been carried out to estimate the seasonal thaw depth and the influence of the thermophysical properties of bulk soilson the change in thickness of the seasonally thawed layer has been assessed.Keywords: permafrost, bulk soils, thermophysical characteristics, thermotechnical calculations