Perm Region Research Articles

Parasitoids (Hymenoptera, Eulophidae, Braconidae) as a mortality factor for the lime leaf miner (<i>Phyllonorycter issikii</i>, Lepidoptera, Gracillariidae) in the Cis-Urals

The assemblage of hymenopteran parasitoids associated with the invasive lime leaf miner, Phyllonorycter issikii (Lepidoptera, Gracillariidae) developing on the lime (Tilia cordata) was studied in the Perm Region and in the Republic of Bashkortostan during 2019. Sixteen species of parasitoids of Ph. issikii were recognized: Diglyphus isaea, Elachertus fenestratus, Hyssopus geniculatus, Pnigalio agraules, P. mediterraneus, Sympiesis dolichogaster, S. gordius, S. sericeicornis, Chrysocharis laomedon, Ch. nephereus, Ch. pentheus, Ch. pubens, Ch. pubicornis, Ch. submutica, Minotetrastichus frontalis (Eulophidae) and Pholetesor circumscriptus (Braconidae). Three species, Diglyphus isaea, Chrysocharis pubens and Ch. submutica (Eulophidae), were reported as parasitoids of the lime leaf miner for the first time. The roles the complex of parasitoids played in the mortality of the miner were negligible. The mortality ranged from 1.3±0.3 (Perm) to 23.7±3.3% (Tolbazy village).

Activity concentrations of 60 Co, 137Cs and 241Am in sieved soil and soil inclusions from the «Taiga» peaceful nuclear explosions site

The article presents results of comparative study of 137Cs, 60Co, and 241Am activity concentrations in components of the soil samples collected in 2009 on the territory adjacent to the «Taiga» peaceful nuclear explosions site (the Perm region, Russia). The objective of the study was to identify differences between: 1) non fractionated native soil, 2) the soil passed through a sieve with a mesh size of 1.2 mm, and 3) the screened out coarse components. Measurements of the radionuclides activities in counting samples were performed using a semiconductor gamma spectrometer. Statistically significantly lower activity concentrations of 137Cs (factor of 1.2), 60Co (factor of 2.2) and 241Am (factor of 2.6) were found in the finely dispersed sieved fraction of soil compared to the native soil. On the opposite, in the solid radioactive inclusions selected from the screened out coarse fraction, the activity concentrations of 137Cs, 60Co and 241Am were significantly higher compared to those in the native soil. Especially large differences (up to a factor of 10 and more) between the native soil and radioactive inclusions were observed for the refractory and low-volatile 60Co and 241Am. Presumably, these radionuclides were concentrated predominantly in the glassy substance of the radioactive inclusions. For 137Cs, the unevenness in the contamination of different soil components was less pronounced. The results obtained will be used to standardize methods for assessing radioactive contamination of the territory at the sites of peaceful nuclear explosions

Значение предшественников и минерального питания в формировании урожайности и качества ярового ячменя в Пермском крае

Abstract. The purpose is to evaluate the influence of previous culture and mineral nutrition on the yield and quality of grain and seeds of spring barley in the conditions of the Middle Urals. Methods. The research was conducted at the Perm Agricultural Research Institute (a branch of the Perm Federal Research Center of the Ural Branch of the Russian Academy of Sciences) over the period 2021–2023 on sod-podzolic heavy loam soil. A two-factor field experiment with different previous culture and mineral nutrition backgrounds was carried out. Data were processed using B. A. Dospekhov’s methods, and grain quality was determined using standard techniques. Results. The limiting factor affecting plant growth and productivity is soil moisture, which influences both the size and quality of crops. Studies have shown that the soil under vetch-oat mixtures had the highest level of productive moisture at the start of the growing season. However, by the end of the season, the highest level was found under clover. During the research period, the most significant decrease in soil moisture was observed after barley, possibly due to the smaller surface area covered by this crop. The study of barley seed germination showed that they met the required standards. Seeds grown after vetch-oat had the best germination rate (95 %), while those preceding barley had the worst (92 %). This suggests that choosing the right precursor and providing optimal nutrition can lead to increased yield and improved grain quality. The yield of barley can vary widely, ranging from 1.06 to 3.77 tons per hectare. The study results show that using vetch-oat as a precursor can provide the best indicators for barley yield and quality. The optimal combination of precursor and mineral nutrient background can significantly improve the efficiency of barley production in agriculture. Scientific novelty: The complex effect of fertilizers and precursor substances on the formation of barley productivity and quality is being studied in the Perm region for the first time. The methods of barley management and quality control studied allow for obtaining highly productive seeds and achieving the planned yield.

Methodological Tools for Assessing Employment and Income of Rural Population under Unpredictable Conditions

Introduction. The modern Russian economy is facing serious problems in the field of labor resources, which leads to high unemployment and low wages. The development of effective solutions requires conducting evidence-based programs, including actions at the enterprise level, the regional labor market and the national level. The options offered to date by various researchers for assessing the employment and income of the rural population are characterized by an aspect and a lack of an integrated approach. Insufficient attention is paid to the integration of estimates, as well as the development of forecast values based on the expected dynamics of stochastic factors. The purpose of the study is to develop a methodology for assessing the employment of the rural population in the production of beekeeping products. Methods. The state and dynamics of the beekeeping industry development was analyzed on the example of the Perm Region. The study of indicators for assessing the employment level of the rural population included the effect of stochastic factors. The uncertainty influence was accounted by the use of correlation and regression analysis and a multidimensional model. The development of a population assessment methodology was based on the method of mathematical modeling. Results. The influence percentage of stochastic factors on changes in the employment level of the economically active population and the complex impact indicator of factors on the of employment level and incomes of the rural population of the Perm Territory were calculated with a forecast for 5 years. Conclusions. The proposed approach will make it possible to more effectively monitor the trends and dynamics of beekeeping development, which will further help to develop effective support measures for this industry.

Method of obtaining and possibility of using of new complex fertilizers from flotation sludge – potassium-magnesium ore processing wastes

The results of research on properties of cinders obtained by high-temperature roasting of clay-salt waste (sludge) after processing K-Mg ores are presented. Cinders are used as complex fertilizers, ameliorant components and microelement fertilizers. Secondary wastes, after extraction of Pd, Pt, Ag from burnt sludge (cinder), consist of sludge after deslagging of crushed cinder and “tails” after sand enrichment. Mixing these products, moistening, granulating and sintering forms result in a sintering product (CP) that is ready for application as complex fertilizer, ameliorating additive and microfertilizer. A study of the chemical composition and composition of impurities of cinders and CP was carried out. The identity of the composition of cinders and CP has been established. Tests with cinders and CP as a complex of fertilizers, ameliorants and microfertilizers were carried out. The research was carried out on the experimental field of Perm Agricultural Research Institute, on sod-podzolic heavy loamy soil formed on the deluvium of Permian clays, this soil represents up to 70% of the arable lands of the Perm region, the studied crop was potato. The yield of potato when applying cinder as an ameliorant additive was higher by 6.05 t/ha compared to the control (the use of traditional fertilizers provided an increase of 3.56 t/ha). For the first time determination of chemical composition including trace elements studies was fulfilled in potato tubers from unfertilized variants, plots fertilized with traditional fertilizers and plots fertilized with cinders. Two components of tubers – peel and pulp – were analyzed using a mass spectral method, with decomposition in a closed system (autoclave). Most of the elements were characterized by a higher content in the peel (almost an order of magnitude) compared to the pulp. An inverse relationship was observed for P and S, their content was higher in pulp than in peel. In the variant with the use of cinder, a higher content of microelements, especially rare-earths elements, was observed compared to the control. A method for processing sludge to extract Pd, Pt, Ag, results in secondary wastes, that can be used as complex slow-release fertilizers, ameliorating additives and microelement-containing fertilizers.

Epidemiological characteristic of nails, skin of the feet and hands mycoses in the Perm region

Introduction. Mycoses of the skin and their derivatives are one of the most common groups of fungal infections. Lesion to the nails and skin of the feet and hands occupies a leading place in the structure of this pathology. These diseases are characterized by a long course and often ineffective therapy. Onychomycosis and fungal infections of the skin of the feet and hands are characterized by certain epidemiological features and have a diverse etiology.Aim. To study of the epidemiological characteristic of mycoses of the nails, skin of the feet and hands according to the data of the Regional Clinical Dermatovenerological Dispensary of Perm over a ten-year period to optimize the detection and further treatment of this pathologyMaterials and methods. For the study, statistical data from the Regional Clinical Dermatovenerological Dispensary in Perm were used. Data were analyzed for the period 2012–2021 to assess the dynamics of the prevalence of mycoses of the skin and nails of the feet and hands, their etiological structure. Cases recorded during direct patient contact were taken into account. For laboratory confirmation of mycoses, a culture method was used.Results and discussion. The number of cases of mycoses of the skin and nails of the feet and hands for the period from 2012 to 2021 was analyzed. It was established that the share of this pathology in the structure of superficial mycoses averaged 49.9%. There was no significant dynamics in the number of recorded cases of fungal infection of this location during the analyzed period. This pathology was more often observed in females than in males throughout the study period. The most significant etiological factors were representatives of Trichophyton spp., Candida spp., as well as molds. There has been a change in the etiological structure of mycoses of the nails, skin of the feet and hands over the observed period: there is a tendency towards a decrease in the proportion of dermatophytes and an increase in the proportion of yeast fungi.Conclusion. The relevance of the studied group of mycoses was confirmed using the example of the Perm region. The main cause of fungal infections of the nails and skin of the feet and hands were representatives of dermatophytes and Candida spp. It is recommended to focus on identifying this pathology in males during preventive examinations due to the low frequency of their visits to medical specialists.

Method for determining reagent optimum volume for acid treatments of carbonate reservoirs based on a pressure build-up curve method

Relevance. The need to increase the efficiency of acid treatments of carbonate reservoirs. Often, the design of treatments does not take into account the actual operating conditions of production wells, which leads to an overestimation or underestimation of the required volume of the reagent. Aim. To propose a method for determining the optimal amount of reagent for carrying out acid treatments of carbonate reservoirs in order to restore the permeability of the rock in the near-well zone, taking into account the actual operating conditions of the well, which allows rationalizing the use of subsoil user resources. Objects. Producing oil wells exploiting oil deposits in carbonate deposits of the Perm region, as well as the results of hydrodynamic studies carried out on these wells. Methods. Theoretical substantiation of the possibility of determining the zone of deteriorated permeability around the well using the pressure recovery curve graph, graphical processing of diagnostic graphs of the pressure recovery curve, mathematical calculation of technological indicators based on hydrodynamic testing data of wells, integration of inflow volumes, analysis of technological data and conditions of applicability of the methodology. Results. The authors have developed the methodology for determining the optimal volume of reagent for acid treatments of carbonate reservoirs based on the pressure recovery curve method. The optimal volume of reagent for 21 production wells was calculated. Using the example of 13 wells, the efficiency of the injected volume of reagent was determined and an overestimated volume of reagent injected into the formation was demonstrated. The authors assessed the subsoil user's costs taking into account the excess consumption of the reagent. The factors influencing the success of the method application depending on the operating conditions of the wells were identified. Criteria inappropriateness of acid treatment were identified.

Possibilities of Simulation Training in Improving Obstetric Care Using the Perm Region as an Example

In the context of solving the problem of reducing cases of critical obstetric conditions and maternal mortality, employees of the Perm State Medical University, on behalf of the Minister of Health of the Perm Territory, developed a comprehensive training program for employees of medical organizations of the obstetric and gynecological profile and chief physicians of the Perm Territory. Over the course of the year, work was carried out to organize on-site training and training for heads of specialized departments.

Surgical treatment of epilepsy in the Perm region

Surgical treatment of epilepsy in Perm Region started in 2020 as a part of project “Organization of a system of surgical care for patients with Drug-Resistant Epilepsy in the Russian Federation”. This article presents the current practice for the period 2020–2022, which includes the selection algorithm for the surgical procedure, surgical methods, early and long-term complications ofsurgical treatment and diagnostics, and early outcomes. We suggest the project of the against epilepsy in Perm Region.

DYULA MESA ROSH AND HIS BASHKIR COLLECTION AT THE HUNGARIAN ETHNOGRAPHIC MUSEUM

In 1909, the Hungarian scientist Gyula Meszaros visited the Bashkirs and collected a unique ethnographic collection. His research took place on the actual territory of the districts Baymak, Abzelilovsky of the Republic of Bashkortostan, the Kurgan region, and the Perm region. The trip, which was initially organized to collect information confirming the Bashkir-Hungarian kinship, did not achieve its goal, since Meszaros, after three months of work, came to the conclusion that there were no ethnic ties between the two nations. However, his collection which is now kept in the Ethnographic Museum of Budapest is one of the most valuable sources in the study of the ethnography of the Bashkirs. It consists of household items, household facilities, clothing of the Bashkirs, as well as unique photographs illustrating the life of the Bashkir nomads of the early 20th century.

Assessment of the Atmospheric Deposition of Potentially Toxic Elements Using Moss Pleurozium schreberi in an Urban Area: The Perm (Perm Region, Russia) Case Study.

Assessment of air quality in urban areas is very important because pollutants affect both the environment and human health. In Perm (Russia), a moss biomonitoring method was used to assess the level of air pollution. The concentrations of 15 elements in 87 samples of moss Pleurozium schreberi in the city territory were determined using a direct mercury analyzer and an inductively coupled plasma atomic emission spectroscopy. Using factor and correlation analyses, the grouping of elements and their relationship with emission sources were established. The main sources of emissions of potentially toxic elements are the transportation (road and rail), metallurgical, and chemical industries. The level of atmospheric air pollution was assessed by calculating the environmental risk index, pollutant load index, and pollution coefficient. Based on the values of the pollution index, the level of atmospheric air pollution in Perm varies from unpolluted to highly polluted, with moderate environmental risk.

Проблемы современного состояния сельского хозяйства Пермского края

The modern world food market is showing stable trends due to increasing demand for agricultural products. The article examines the state of agriculture in the Perm region, analyzes the structure of the livestock complex, the dynamics of sown areas and agricultural products in the context of livestock and crop production sectors.

Geochemistry and microbiology of boreal alluvial soil under salinisation

Soil salinisation in taiga landscapes is in most cases caused by anthropogenic activities. The study was carried out in Perm region (Russia) on the territory of the Verkhnekamskoe Potash Deposit. The inflow of sodium chloride drainage water into ground and surface waters during the production of potash fertilisers contributed to the technogenic salinisation of river valleys in the taiga zone. The purpose of the research was to investigate the microbial composition and chemical properties of alluvial soils in the area affected by NaCl waters in the Lyonva River valley. The chemical properties of soils were determined standard methods such as potentiometric method, titration, and spectrophotometry. The microbial community was determined by 16 s rRNA gene metagenomic analysis. The soil's mineralogical composition was determined using a binocular microscope and diffractometer for XRD. The morphology and microstructure of the samples has been studied using an analytical scanning electron microscope. In Solonchaks, an interdependence of salinity and bacterial species composition was discovered, along with the bacteria's geochemical processes. The topsoil contains a considerable amount of toxic salts, ranging from 5.9 to 17%. The ratio of exchangeable cations in the soil absorption complex changes when exchangeable calcium is replaced by sodium. Salinisation caused the neutralisation of acidic alluvial soils. Bacteria originating from marine and highly mineralised environments predominate in the soil. The soils are dominated by bacteria originating from marine and highly mineralised environments, such as Proteobacteria, Shewanella (75–79%), Thiomicrospira (26%), Desulfuromonas, Marinomonas and Idiomarina (9–10%), Alicyclobacillus (4%). The correlation revealed the connection of some taxa with ions of aqueous extract, as well as with exchangeable sodium, mobile iron and total sulphur. Some bacteria promote azonal geochemical processes within alluvial forest soil, such as the reduction of iron and manganese, the production of sulphides, and the oxidation of sulphur, hydrogen, and iron. Sulphide accumulation resulting in the formation of a hydrotroilite horizon (FeS × nH2O) and iron-bearing formations were found on the soil surface. Studying the properties and degree of soil disturbance makes it possible to identify the contribution of enterprises to environmental pollution, as well as to apply new methods for monitoring, purifying, and storing potassium waste.

Radioactive glassy inclusions in the soil sampled at the “Taiga” peaceful underground nuclear explosions site (the Perm region, Russia)

Activities of gamma-emitting radionuclides were measured in glassy inclusions (particles) found in soil samples from the “Taiga” peaceful nuclear explosions site (the Perm region, Russia). The measurements were performed using a stationary semiconductor gamma spectrometer. Activity concentrations were determined for the following technogenic radionuclides: 60Co, 94Nb, 137Cs, 152Eu, 154Eu, 155Eu, and 241Am. The activity concentrations of 241Am in the glassy inclusions were one to two orders of magnitude higher compared to the level of minimum significant activity concentration (1 Bq/g for 241Am) established by the Russian Radiation Safety Standards “NRB-99/2009”. Earlier, exceeding this level for the 241Am activity concentration in the native (unfractionated) soil samples from the “Taiga” site was reported by other researchers. In accordance with current Russian legislative and regulatory provisions regarding use of nuclear charges for peaceful purposes, the soil and radioactive glassy inclusions found in the soil correspond to the category of special radioactive waste. Considering the long half-life of 241Am (432 years), radiologically significant contamination by this radionuclide will persist at the “Taiga” site for the foreseeable future.

Results of petrographic analysis of stone assemblage from the Kosa Mesolithic sites (Northern Kama region)

In this paper, the results of petrographic analysis of stone materials from the Mesolithic sites of Kosa 1–3 in the northern Kama River area (Perm Region) are discussed. The sites of Kosa 1 and 2 are located on the second terraces of the Lolog and Kosa Rivers, and Kosa 3 — on the first terrace of the Kosa River. Kosa 1 and 2 are considered chronologically similar and belong to the Late Mesolithic period. The site of Kosa 3 is younger, and it marks the transition from the Mesolithic to the Neolithic. For the analysis, aimed at determining the ancient raw material strategies, selected were five stone artifacts from Kosa 1, five stone artifacts from Kosa 2, and eight samples from Kosa 3. Polarised microscopy was used for the petrographic study of stones in thin sections. This method allows the precise diagnosis of minerals and rocks based on their optical characteristics. The results indi-cate that flint and jasper were applied as main raw materials at all analysed sites. The choice of material for the stone industry at the sites was limited. Sandstone and siltstone were used for production of stone macro tools. The difference in raw source materials was determined for the Kosa 1 and Kosa 2 sites on one hand, and Kosa 3 on another — the main raw sources at the Mesolithic sites were flint and jasper, while at the Kosa 3 transitional site coloured pebbly flint was used. The comparison of the results with petrographic data from other Mesolithic sites of this region demonstrates similarity in the main principles of the strategy of raw source choices such as using flint and jasper. Furthermore, a larger variety of source raw materials has been determined for the sites of the Middle Kama River basin. The comparison with the results from the Late Stone Age sites also revealed a greater variety in the materials used in comparison with the Kosinsk sites (platy flints, cherts, tuffs, gabbro, and others). All raw materials were of local origin such as alluvial deposits of the Lolog and Kosa Rivers. The results of the petrographic analysis suggest the situational choice of materials for the manufacture of tools by the local population, with the main factor being their easy accessibility.

On the occasion of the 90th anniversary of professor Alexander Alekseevich Shutov`s birth

The life and professional path of Alexander Alekseevich Shutov, the Doctor of Medical Sciences, Professor, the head of the Department of Neurology and Medical Genetics of E.A. Vagner Perm State Medical University, are described in the article, as well as his scientific achievements, contribution to the organization of the university’s work, success in training of scientists, educators and neurologists of the Perm Region.

EXPLORING THE POTENTIAL FOR OPERATIONAL OVERSIGHT OF REMAINING RECOVERABLE RESERVES THROUGHOUT VARIOUS PHASES OF OIL PRODUCTION FACILITY DEVELOPMENT

Assessing oil recovery rates through geological and hydrodynamic modeling incurs significant financial and time investments. Consequently, recalculations of recoverable hydrocarbon reserves occur infrequently, leading to potential discrepancies between approved factors and actual conditions. To ensure accuracy in assessing residual recoverable reserves, it's crucial to promptly monitor the validity of oil recovery factors, especially concerning their achievability within specific timeframes. This article examines the practice of annually assessing geological and economic reserves according to international standards. Operational monitoring methods include analog-statistical techniques, displacement characteristics, and production decline rate analysis, each reliant on initial data quality and production object development stages. The effectiveness of these methods is illustrated through specific examples. Analog-statistical dependencies, tailored to operational facilities' geological indicators, prove most effective for early-stage development. In advanced stages, methods based on displacement characteristics and production decline rates gain reliability, factoring in economic development profitability limits. Statistical dependencies incorporating technological indicators can enhance control measures. Integrating diverse methodological approaches ensures a more dependable assessment of production object residual recoverable reserves. When determining residual recoverable reserves and designing the development of oil fields, the main characteristic that determines the reliability of forecast calculations is the accuracy of estimating the oil recovery factor. The value of the oil recovery factor characterizes the share of initial recoverable reserves that can be extracted from the subsoil from the initial geological reserves when developing a deposit using modern proven technology and production techniques to the limit of economic profitability while complying with the requirements of subsoil and environmental protection. The most common method for estimating the oil recovery factor is digital geological-hydrodynamic modeling, in which the processes occurring during the development of oil deposits are simulated using software. This method has been introduced in the Russian oil industry since the mid-90s. XX century, recommended for use by current regulations [1]. Based on digital geological and hydrodynamic modeling, various options for the development of oil deposits are calculated, differing in the number of production and injection wells, the rate of reserve withdrawal, etc. Examples of the effective use of digital geological and hydrodynamic modeling in designing the development of oil fields are given in works [2–4], in including for the territory of the Perm region [5–10]. The most economically feasible option for field development is approved by the authorized government bodies, and each production facility is characterized by a design oil recovery factor. There is no doubt that the construction of digital geological and hydrodynamic modeling in the presence of standard geological and technological data is the most reliable way to determine the oil recovery factor. However, this method requires very large financial and time costs, which leads to significant time intervals between calculations of the Oil Recovery Factor, which in most cases exceed 10 years. As a result, over time, the approved Oil Recovery Factor may significantly lose relevance both due to the discrepancy between the design development indicators and the actual ones, and due to changes in the economic conditions of development. Taking this into account, it is extremely important for production facilities to quickly monitor the validity of the Oil Recovery Factor, including its objective achievability in a specific time frame. Keywords: Remaining recoverable reserves, efficiency of oil extraction, operational facility, design of oil field development, evaluation of geological and economic reserves, displacement patterns, decline in oil production rate.

An attempt to replace orthodox sacraments with new Soviet rituals in the 1960–80s: a case study of Perm region

An attempt to replace orthodox sacraments with new Soviet rituals in the 1960–80s: a case study of Perm region

АНАЛИЗ МЕРОПРИЯТИЙ ПО ПОВЫШЕНИЮ ЭКОНОМИЧЕСКОЙ ЭФФЕКТИВНОСТИ И КАЧЕСТВА ЗЕРНА В ПРОЦЕССЕ ЕГО ПРОИЗВОДСТВА И ХРАНЕНИЯ

The scientific article contains a review of scientific literature on the problems of ensuring the efficiency of grain production by improving its quality. Controlled and uncontrollable factors and conditions for ensuring grain quality are noted. Among the controllable factors and conditions, technical, technological, organizational and economic factors are stated; uncontrollable factors and conditions include solar insolation, daylight hours, temperature, and precipitation. It was revealed that the quality of grain and losses during storage are influenced by: climate, poor-quality grain cleaning, grain injuries, elevated temperature, high humidity, storage processing, technical integrity of the premises. The formation of quality at the stages of grain production is shown: preparation of seed, growing conditions, harvesting conditions, crop transportation, primary processing and storage. It is indicated that spring wheat of soft varieties, cultivated on farms in the Perm region, has a high internal market potential: high technological and baking properties, can be used for the production of flour and baking bread. The consumer properties of zoned varieties of winter and spring soft wheat are shown: the Irgina variety scored the most points (4.7 - 4.9 points), and the Iren variety took second place (4.4 - 4.7 points). The cost of flour obtained from processing grain with a natural weight of 750 g/l was calculated at 700,000 rubles, as well as the cost of flour obtained from processing grain with a natural weight of 760 g/l was calculated at 709,872 rubles; a deviation in the cost for grain quality account in the amount of 9872 rubles.

Numerical analysis of a pressure distribution field and fluid flow velocity vectors near cumulative perforation holes

Relevance. The need to determine a reliable pressure distribution field and fluid filtration velocity vectors inside the perforation hole and the reservoir rock surrounding it. Aim. On the basis of numerical finite element modeling of the fluid flow inside the perforation holes and its filtration in the surrounding reservoir rock, to reveal the patterns of pressure distribution and fluid filtration vectors in the perforation hole, on its walls and in the near-wellbore zone. Objects. Near-wellbore zone of a limestone reservoir of one of the oil fields in the south of the Perm Region, including perforations. Methods. Numerical finite element method for calculating the flow and filtration of liquid in the near-wellbore zone, taking into account the geometry of perforation holes. Results. The paper considers the main relationships used in numerical simulation of fluid flow and filtration in the ANSYS finite element modeling software package. The authors have developed the finite element scheme of the near-wellbore zone, including cumulative perforation holes and taking into account their geometric parameters, as well as the fact that inside the holes the fluid flow is modeled in open space using the Navier–Stokes equations, and in the surrounding reservoir rock based on the filtration equations and Darcy's law. Numerical calculations were carried out, on the basis of which the distribution of pressure, flow velocities and fluid filtration inside the holes and in the near-wellbore zone as a whole was obtained. Calculations were made with varying pressure in the well (or pressure drawdown), as well as for different values of reservoir permeability. The calculation results showed that for the actual drawdown values of 10 MPa and the reservoir permeability of 50 mD, the value of pressure change inside the perforation holes will not exceed 0.01 MPa, i.e. it can be assumed that it practically does not change inside the hole. It is noted that the maximum value of the filtration rate corresponds to the top of the perforation holes and then its value decreases as it approaches the borehole wall. It is concluded that in further modeling of the stress-strain state of the near-wellbore zone, taking into account the holes of cumulative perforation on the surface of the holes, it is permissible to set a constant pressure value equal to the pressure in the well, and not logarithmic or any other distribution of it.