Open AccessEfektywność procesu intensyfikacji wydobycia ropy naftowej z zastosowaniem metody nawadniania oryginalną wodą złożową oraz wodami o niskim stopniu zasolenia
Author(s) -
Marcin Majkrzak
Publication year - 2021
Publication title -
nafta gaz
Language(s) - English
Resource type - Journals
ISSN - 0867-8871
DOI - 10.18668/ng.2021.08.05
Subject(s) - petroleum engineering , petrophysics , relative permeability , permeability (electromagnetism) , geology , wetting , petroleum reservoir , brine , porosity , geotechnical engineering , mineralogy , materials science , chemistry , composite material , biochemistry , organic chemistry , membrane
The article presents the results of research on the possibility of increasing the recovery factor of oil fields by implementing the waterflooding treatment as one of the most common enhanced oil recovery method. Based on the interpretation of data from the core flow tests, an attempt was made to characterize the displacement process using original reservoir brine and waters with lower salinity level. Additionally, the relation between the type of wettability of the rock and recovery factor was investigated. Original reservoir fluids that were characterized in terms of their basic rheological parameters were used for research purposes. The rock material consisted of 16 samples of Cambrian sandstones. The initial scope of work concerned the petrophysical characteristics of the cores, including the determination of their basic parameters, such as absolute gas permeability, porosity and pore volume. Based on the determined values of permeability, the available samples were grouped which made it possible to perform test sets for pairs with the most similar filtration parameters in the next stages of the research. Further work included the performance of relative permeability analyses and the determination of the value of the mobility factor for the oil – reservoir water system in order to determine the type of wettability of the rock and the potential efficiency of the oil displacement process. The main element of the research was the simulation of the waterflooding process carried out in two parts – the first with the use of the original reservoir water (corresponding to the secondary recovery methods) and the second with the use of low-salinity waters (the third recovery methods) in two variants of the mineralization level. Based on the obtained data of the displaced oil, for each of the displacement medium recovery factor curve were constructed and compared with the determined type of wettability of the rock.