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Rudarsko-geološko-naftni zbornik, Vol. 36 No. 2, 2021.

Preliminary communication

https://doi.org/10.17794/rgn.2021.2.4

THE EFFECT OF PRESSURE DEPRESSION ON THE WATER INFLOW VOLUME TO WELLS WHICH COVER CARBONATE ROCKS IN THE CARPATHIAN FOREDEEP BASEMENT, SE POLAND

Mirosław Rzyczniak ; AGH University of Science and Technology, Faculty of Drilling, Oil & Gas, Mickiewicza 30, 30-059 Kraków, Poland
Marek L. Solecki orcid id orcid.org/0000-0001-8637-8300 ; AGH University of Science and Technology, Faculty of Drilling, Oil & Gas, Mickiewicza 30, 30-059 Kraków, Poland
Dagmara Zeljaś ; AGH University of Science and Technology, Faculty of Drilling, Oil & Gas, Mickiewicza 30, 30-059 Kraków, Poland
Stanisław J. Dubiel ; AGH University of Science and Technology, Faculty of Drilling, Oil & Gas, Mickiewicza 30, 30-059 Kraków, Poland

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Abstract

This paper presents an analysis of well testing data, performed with a Drill stem test (DST). The carbonate levels of Mesozoic reservoir rocks were investigated in the research area of the Carpathian Foredeep. Based on the results of 17 two-cycle DST reservoir tests, the dependence of the volume of the reservoir water flow rate from the Mesozoic carbonate reservoirs (Upper Jurassic, Lower Cretaceous) to the wells as a function of the mean depression of bottom pressure was researched in the selected oil exploration area in the Carpathian Foredeep basement, SE Poland. Using methods of statistical analysis, a satisfactory correlation between variables for power and the exponential model was found, and a weak correlation for the linear model was found. A decrease in the value of the reservoir water flow rate along with an increase in pressure depression was found for the Mesozoic carbonate reservoirs, which may indicate the occurrence of fractures and micro-fractures shortening under extreme pressure depression and blockage phenomena of fractures and cavernous pores in the perimeter area by solid particles (cuttings, salt, polymers, etc.).

Keywords

Carpathian Foredeep; Mesozoic; DST test; statistics; water flow volume

Hrčak ID:

254161

URI

https://hrcak.srce.hr/254161

Publication date:

21.3.2021.

Article data in other languages: croatian

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