Naslov
Quantification of production variables in sandstone hydrocarbon reservoirs versus other lithologies in Croatia
(Kvantifikacija varijabli proizvodnje u pješčenjačkim ležištima u odnosu na druge tipove ležišta u Hrvatskoj)

Autori
Malvić, Tomislav ; Velić, Josipa ; Cvetković, Marko

Izvornik
Naftaplin : znanstveno-stručno glasilo Hrvatske udruge naftnih inženjera i geologa (1330-2434) 68 (2012), 12; 19-25

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
reservoir lithofacies; Middle Miocene; Late Miocene; hydrocarbon reserves; recovery; Pannonian Basin; Croatia
(ležišni litofacijesi; srednji miocen; gornji miocen; rezerve ugljikovodika; iscrpak; Panonski bazen; Hrvatska)

Sažetak
The main hydrocarbon reservoirs in the Croatian part of Pannonian Basin (CPBS) are discovered in sandstones of Upper Pannonian and Lower Pontian (i.e. Upper Miocene) ages (1st reservoir lithofacies). The other two reservoir lithofacies are Badenian coarse-grained clastites (2nd lithofacies) and Pre-Neogene carbonates, magmatites and metamorphites (3rd lithofacies). The discovered hydrocarbon reserves are consequently lesser toward older lithofacies. Amount of geological reserves of hydrocarbons discovered in 1st reservoir type (sandstone) are: oil 217, 316, 037 m3 (68.63% of total reserves in all lithofacies), gas dissolved in oil and gas cap 24, 391.95 x106 m3 (79.08% of total reserves), gas 27, 199.47x106 m3 (22.80% of total reserves), condensate 2, 637, 147 m3 (12.90% of total reserves). It is clear that sandstone reservoirs are the main reservoir types (about 70% of total reserves) for oil as well as for gas (recovered from oil or gas cap). However, reached recovery is the maximal in breccia reservoirs (38.74% in 2nd, 29.96% in 1st and 26.2% in 3rd reservoir type). Sandstone reservoirs are mostly found in structural and structural-stratigraphic traps. There are more than 200 separate reservoirs bodies, with average porosity about 21% and permeability in range from 3.73 to 384.00x10-15 m2. This lithology is the most probable for discovering new, satellite reservoirs on existing fields or the application of water or gas injection for reaching additional recovery.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

Napomena
Poseban broj časopisa (ISSN) priređen kao zbornik radova 1. međunarodne konferencije i izložbe o naftno-plinskom gospodarstvu u središnjoj i istočnoj europi (Šiofok, Mađarska, 14.-16. rujna 2011.).

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