CHARAKTERYSTYKA POZIOMÓW ZBIORNIKOWYCH I USZCZELNIAJĄCYCH FORMACJI JURY I TRIASU PÓŁNOCNEGO MAZOWSZA POD KĄTEM GEOLOGICZNEGO SKŁADOWANIA CO2 NA PODSTAWIE DANYCH Z GŁĘBOKICH OTWORÓW WIERTNICZYCH

Abstract

CHARACTERIZATION OF THE JURASSIC AND TRIASSIC RESERVOIRS AND SEALS FROM NORTH MAZOVIA AS A CANDIDATE SITE FOR CO₂-STORAGE BASED ON DATA FROM DEEP BOREHOLES

Abstract. Jurassic and Triassic sediments encountered in 53 deep wells from northern Mazovia were interpreted geologically and geophysically in terms of CO₂ storage potential. Reservoir horizons with the most favourable petrophysical properties, thickness patterns and facies were detected within the Middle Jurassic (Lower Aalenian) and Lower Jurassic (Borucice Fm., Drzewica Fm., Ostrowiec Fm., Olsztyn Fm. and lower part of the Zagaje Fm.). The Upper Triassic Schilfsandstein sandstone horizon has ten characterized by porosities meeting the CO₂ storage criteria. The permeability however is text low in most cases. The thickness, facial and petrophysical criteria of the Jurassic sealing horizons of the middle part of the Upper Bajocian, Upper Aalenian, Ciechocinek Fm. and of the upper part of the Zagaje Fm. are not equally adequate throughout the area. The Upper Triassic Nidzica beds and partially Bartoszyce beds form a sealing horizon of good petrophysical properties and exceeding 100 m in thickness across the whole study area.