Open AccessEvaluation of the geological factors impact on capacity and filtration properties of terrigenuous reservoirs of the Pre-Carpathian foredeep
Author(s) -
S. S. Kurovets,
І. V. Artym
Publication year - 2018
Publication title -
naukovij vìsnik ìvano-frankìvsʹkogo nacìonalʹnogo tehnìčnogo unìversitetu nafti ì gazu
Language(s) - English
Resource type - Journals
eISSN - 2415-3524
pISSN - 1993-9965
DOI - 10.31471/1993-9965-2018-1(44)-25-37
Subject(s) - geology , porosity , terrigenous sediment , permeability (electromagnetism) , carbonate , clay minerals , carbonate rock , quartz , mineralogy , texture (cosmology) , geochemistry , geotechnical engineering , sedimentary rock , materials science , chemistry , paleontology , biochemistry , artificial intelligence , membrane , computer science , metallurgy , image (mathematics)
The following main geological factors that determine the reservoir properties of the terrigenous rocks of the Pre-Carpathian foredeep were identified, namely: mineral composition, structural and texture features, and thermobaric factors. The mineral composition of the rock-forming minerals, the shape, the size of the fragmented grains and pores, their mutual placement, the type of fluid and the thermodynamic state determine the reservoir properties of terrigenous rocks. The best reservoirs are sandstones, compiled with larger and sorted grains. The increase of clay and carbonate material sharply worsens the reservoir properties of rocks. Sealing and secondary processes (sieving, calcifying, pyrolysis) negatively affect the reservoir properties of rocks, reduce their porosity and permeability.
Some dependencies were identified. These dependencies make it possible to predict the maximum porosity of sandstones, depending on their immersion in depth. The given porosity data of sandy-clayey rocks shows, that sorted quartz sandstones with insignificant contents of clayey and carbonate materials have greater intergranular porosity and permeability at great depths.