HYDROGEODYNAMIC AND HYDROGEOCHEMICAL CONDITIONS OF THE LOWER-MIDDLE JURASSIC COMPLEX IN TALINSKOYE OIL FIELD

Abstract

Hydrogeodynamic and hydrogeochemical conditions of the Lower-Middle Jurassic complex are considered on the example of the oil field Talinskoye located in Krasnoleninsk oil and gas bearing area. The authors describe the complicated structures of the hydrogeodynamic and hydrogeochemical fields in the studied area. It is shown that the deficit reservoir pressure is in average 1.6 MPa. Within the field the zones of the waters ion-salt composition anomalies have been are identified. These zones are characterized by low values of mineralization (in average 5 g/l) as compared to the background value (8 - 9 g/l). The dependence of the hydrogeochemical anomalies formation on the faults position, the temperature of the basement top and the values of reservoir pressures is consistent with the model of the conjugated falling-rising mass transfer.