Bitumens as a Cause of the Occurrence of the Low Electrical Resistivity Zones in the Basement Rocks of the West Siberian Plate

摘要

This work reports on the results of the studies of the material composition and physical properties of the basement rocks of the West Siberian Plate. It has been shown that the rocks contain bitumens of anthraxolite and kerite groups. We assume that the bitumens create the Late Paleozoic paleodeposit, transformed under the conditions of apocatagenesis. Impregnation with highly transformed organic matter leads to a significant decrease in electrical resistivity to values of 1-30 ohm m, which must be taken into consideration when interpreting the low-resistivity zones on the basis of log data.