Hydrogeologiczne kryteria poszukiwań naftowych w północno-wschodniej Polsce
Abstract
HYDROGEOLOGICAL CRITERIA IN SEARCH FOR PETROLEUM IN THE NORTH-EASTERN AREA OF POLAND
Summary
Water of both Mesozoic and Palaeozoic aquifers is in a stagnating state. According to mineralization and specific weight, water level is stabilized at a depth of several to 100 metres below the uppermost water table in the Quaternary formations. In any case it is balanced by a water column calculated from the uppermost table in the Quaternary up to the upper edge of the perforated or uncovered interval. Chemical composition of water excludes any infiltration of surface water both at present and in the past. The Cretaceous and Jurassic formations disclose relict, mainly non-metamorphosed water, whereas waters in the Triassic and Palaeozoic formations are metamorphosed. The upper aquifers display diffuse freshwater. From Cambrian to Cretaceous all aquifers are thought to be oil-bearing, provided that the promising areas with the aquifers decrease westward as they rise in the stratigraphical section.
Summary
Water of both Mesozoic and Palaeozoic aquifers is in a stagnating state. According to mineralization and specific weight, water level is stabilized at a depth of several to 100 metres below the uppermost water table in the Quaternary formations. In any case it is balanced by a water column calculated from the uppermost table in the Quaternary up to the upper edge of the perforated or uncovered interval. Chemical composition of water excludes any infiltration of surface water both at present and in the past. The Cretaceous and Jurassic formations disclose relict, mainly non-metamorphosed water, whereas waters in the Triassic and Palaeozoic formations are metamorphosed. The upper aquifers display diffuse freshwater. From Cambrian to Cretaceous all aquifers are thought to be oil-bearing, provided that the promising areas with the aquifers decrease westward as they rise in the stratigraphical section.