Selection of section intervals promising for gas search in Upper Cretaceous clay deposits of the north of Western Siberia (on the example of the Medvezhye gas fild)

Abstract

Reserves estimation approach is discussed for the Upper Cretaceous Senonian deposits at Medvezhye gasified. The approach is based on geological, petrophysical characterization and production history of the field. Dominant clay formations that form the gas-bearing reservoir are described and characterized. Primary guidelines are defined to estimate geology and hydrocarbon saturation based on geophysical well logs.