Well Log Based Assessment of Oil and Gas Bearing Deposits of the Khadum Suite in the Ciscaucasia Region

The Oligocene source rocks of East Ciscaucasia are represented by argillite-like clays with inclusions of siliceous and carbonate materials. They are often referred to as the “Khadum Suite” or “Khadumity” in the specialized literature (similarly with “Bazhenite” in Western Siberia and “Domanikiti” in the Cis-Ural region). Studies of the Khadum Suite launched in the late 1970s have not produced a fully developed technique for the reservoir properties estimation on the basis of well log data as well as a final version of petrophysical model yet. In this paper we discuss the ways to evaluate anomalous pore pressure, organic matter content, and construction of volume petrophysical models of the Oligocene source rocks using limited sets of old well logs from 1950s.