Prospecting for karst disturbances using electrical exploration methods
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Abstract
The industrial oil shale reservoir of the Leningradskoye field is confined to the Kuker horizon of Ordovician limestones. The thickness of the overlying strata varies from 50-60 m in the north to 80-100 m in the south. In the northern part, Ordovician limestones are directly spread under Quaternary sediments; in the southern part, apart from Quaternary sediments, they are overlain by Middle Devonian sediments (marls, sands and clays). The thickness of Quaternary sediments averages 5-10 m.
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