Artykuły (CN-jge)

Permanent URI for this collectionhttps://repo.agh.edu.pl/handle/AGH/102803

Artykuły czasopisma Journal of Geotechnology and Energy

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Access status: Open Access ,
A new »Emir« composite for the decolmatage of oil and gas layers after drilling and during deposit exploitation to increase the efficiency of hydrocarbon production
(AGH University of Science and Technology Press, 2022) Gubič, Igor Bogdanovič; Krupskij, Ûrij Zinovʹevič; Pavlunʹ, Mikola Mikolajovič; Vitenko, Vasilʹ; Feìčuk, Vitalij
A new effective composite »Emir« has been created, which reduces the swelling of clay minerals and cleans the near-well zone of oil and gas-saturated layers from residues of drilling fluid, technical and formational water, resin-asphaltene components and paraffin, thereby restoring the efficiency of the well. The composite has high cleaning characteristics and the ability to foam in the presence of highly mineralized waters (up to 250 g/l), oil products and mineral acids. It also forms both straight and reverse mobile water-oil emulsions, which is important for cleaning oil layers. Based on the results of testing the »Emir« composite in production conditions on gas and oil wells, it was concluded that the use of »Emir« allows the discharge of hydrocarbon fluids to increase from 20% to 50% or more. The »Emir« composite can also be used on »low-flow« wells which have been clogged or eliminated for geological and technical reasons, this makes it possible to significantly increase the recoverable reserves of hydrocarbons in various oil and gas-bearing regions, especially taking into account the small volumes of drilling and the low success rate of searching for new oil and gas fields.
Access status: Open Access ,
The use of passive seismic exploration to identify oil-bearing reservoirs in the Udmurt Republic, Russia
(AGH University of Science and Technology Press, 2021) Lihačeva, Olʹga Vladimirovna; Kašin, Gleb Ûrʹevič; Mironyčev, Vadim Gennadʹevič
The level of oil production in the Udmurt Republic is currently experiencing a declining trend due to the depletion of large and medium-sized oil fields that have been in operation for a long time. Therefore, the main challenge in this region is to stabilize & increase oil extraction by means of exploring more promising oil fields of a smaller size. However, some issues cause difficulties. Firstly, 2D and 3D seismic data often do not provide the reliable mapping of small fields. Secondly, geological prospecting and exploration, along with exploratory drilling, make these works costly. Furthermore, the estimation of the reserves for such deposits often contains errors. Passive seismic exploration is proposed as a solution to these problems, reducing exploratory and exploitation drilling costs, with the time required for geological exploration also being diminished.
Access status: Open Access ,
An evaluation of the effectiveness of anomalous systems in gas subsidiaries (a case study of the Alborz Gas Company)
(AGH University of Science and Technology Press, 2022) Ghasemi, Fatemeh Sadat; Kazemian Talkhooncheh, Alireza; Lavasani, Mohammad Reza Miri
An anomaly is an unsafe condition or action that has the potential to cause an accident. These conditions, or unsafe practices in gas companies, play a very important role in the occurrence of gas leaks and fires. Any unsafe acts can lead to unpleasant incidents for citizens, their homes, and property. This study aims to increase the effectiveness of anomalous systems in the gas subsidiaries of Alborz province. To conduct this study, the Tripod Beta technique was used to draw a diagram of the analysis of gas accidents in homes in the Alborz province, and the hierarchical analysis method was used to assess the risk of injuries, casualties, and unintentional house fires. In the first stage, information on gas leaks, and fires were collected by reviewing the documents related to the winter events of 2020. Then the sum of the mentioned conditions was studied as a hypothetical model. In the second step, the mentioned model was analyzed using the Tripod Beta method, and the causes of the accidents were determined by the capability of the study method. The obstacles studied were technical safety regulations, and the creation of a safe environment. The primary reason attached to the technical safety regulations was the lack of proper understanding of valve openings and closing signs. Another immediate reason for the need to create a safe environment was the lack of safety equipment. The precondition for not understanding the open and closed sign of the valve, lack of sufficient knowledge, and the precondition for not using safety equipment, buying unsafe equipment, and the hidden reason for the lack of sufficient knowledge, lack of training, and the hidden reason for buying unsafe equipment, was the poor economic situation. The results of this study indicated that fire-related conditions are of the utmost importance in assessing the risk of unintentional house fires. Failure to pay attention to safety points while using gas-related equipment, the poor condition of the building, and more male residents have the most anomalies in causing gas company accidents.
Access status: Open Access ,
Analysis of the potential heating of selected student residences at The AGH University Of Krakow using the earth’s heat
(Wydawnictwa AGH, 2023) Sapińska-Śliwa, Aneta; Kunasz, Remigiusz; Śliwa, Tomasz
The aim of this study was to adapt the operating parameters of a geothermal heat pump system to the required average power needed to meet the energy for central heating and domestic hot water of selected student residences. Calculations of the average power required by the dormitories in the AGH University Student Campus were carried out, as well as modelling of the deep borehole heat exchanger for the heating load. The designed heating system for the student residences in the AGH University Student Campus using a deep borehole heat exchanger – is sufficient to cover the base heat demand for five four-storey dormitories. During the writing of the paper, the main problem was the low availability of articles on deep borehole heat exchangers. This is due to the continuous development and testing of new engineering ideas. Deep borehole heat exchangers can be use as new boreholes or wells prepared for liquidation. Also use of closed boreholes sometimes is possible, depending on project of liquidation. The future districy heating will use low-temperature heat carrier for heating and cooling. Use borehole fields as rockmass use for heat and/or cool ,storage will be common.
Access status: Open Access ,
Mathematical model to analyze the geometric limitations of mechatronic devices moving in curved pipe sections
(Wydawnictwa AGH, 2024) Zwierzyński, Adam Jan
This article presents a method enabling the determination of the minimum radius of pipe bending in which it is possible to move freely a cylinder with defined dimensions. A respective mathematical model has been presented. The below-described method can be useful in the future, while designing mechatronic tools for working in lateral bores starting from a vertical bore, and also while designing inspection robots moving in pipes and pipelines.
Access status: Open Access ,
Groundwater contamination by BTEX hydrocarbons and phenol at former gasworks sites in Bydgoszcz
(Wydawnictwa AGH, 2023) Macuda, Jan; Łukańko, Łukasz
Wydział Wiertnictwa, Nafty i Gazu
This paper addresses the historical environmental impact of Bydgoszcz’s »Old Gasworks«, located on Jagiellońska Street on the Brda River - one of Poland’s oldest and longest-operating gas production facilities. Municipal gas derived from dry coal distillation served both municipal and industrial purposes until 1973. However, the production process, marked by significant nuisances, particularly affected the ground and water environment. Pollutants, primarily organic compounds such as aromatic hydrocarbons, including PAHs (polycyclic aromatic hydrocarbons), and BTEX hydrocarbons (benzene, toluene, ethylbenzene, xylenes), phenol and mineral oil, entered the environment through equipment failures, leaks, and the improper storage of wastewater and technological waste. One of the major sources of contamination was inadequately executed construction activities related to the dismantling of installations and the liquidation of sewage and waste storage tanks. This paper presents the findings of a comprehensive study focusing on hydrocarbon concentrations in groundwater at the »Old Gasworks« in Bydgoszcz and proposes effective methods for treating the water environment.
Access status: Open Access ,
Secondary arsenates from the Ľubietová-Svätodušná copper deposit in Slovakia
(Wydawnictwa AGH, 2024) Solecka, Urszula
In the vicinity of Lubietová in the Banská Bystrica region in Slovakia, copper was mined in three deposits: Podlipa, Svätodušná, and Kolba. The study concerns the association of secondary arsenates of the Lubietová-Svätodušná copper deposit. The Lubietová-Svätodušná deposit contains a large number of secondary minerals, formed as a result of weathering in the hypergene zone. Among them, copper arsenates are the most important, due to the rare occurrence of some of them. Four secondary arsenates have been characterized: chalcophyllite, euchroite, olivenite and pharmacosiderite. The minerals were identified using X-ray diffraction (XRD), whereas observations under a scanning electron microscope (SEM) and chemical analysis (EDS) showed that some of them are heterogeneous, contain different substitutions, and show significant variability in the content of individual elements within single specimens.
Access status: Open Access ,
Elements of reservoir simulation for tight gas reservoirs with water influx
(AGH University of Science and Technology Press, 2021) Sowa-Zyzańska, Magdalena
At present, gas obtained from unconventional deposits plays an important role in the global economy as an energy factor. The simulation of the exploitation of this type of deposits is very complex and requires an individual approach for each case, which is extremely inspiring and interesting, therefore this article attempts to deal with the problem of modeling the extraction of natural gas from tight unconventional deposits. Extraction of tight gas requires the use of measures that stimulate this process and requires an unusual approach both at the stage of deposit recognition, its drilling and exploitation. Using computer programs, more and more accurate models are developed taking into account almost all known processes occurring in the deposits during exploitation, which significantly influences the better selection of parameters of wells and operations that intensify the production, and thus improves the results of exploitation.
Access status: Open Access ,
The influence of the trajectory of a borehole heat exchanger on the power exchanged with the rock mass
(Wydawnictwa AGH, 2025) Kowalski, Tomasz
The article presents the influence of the trajectory of a borehole heat exchanger on the power exchanged with the rock mass. The focus is on the thermal parameters of rocks, which include thermal conductivity. This parameter can be determined using literature, laboratory tests or in-situ using a thermal response test. The design of the borehole heat exchanger as an inclined borehole maximizes the power exchanged with the rock mass by increasing the length of the borehole exchanger in the layer with the best thermal parameters. Mathematical calculations and thermal response tests show the advantage of inclined wells over vertical borehole heat exchangers in terms of the amount of power obtained from the rock mass.
Access status: Open Access ,
Impact of the geometrical configuration of electrical submersible pump impellers on run life and sand stuffing: a case study and recommended practice
(Wydawnictwa AGH, 2024) Eltigani, Masaad
The objective of this study was to identify the root cause of the premature failures of electrical submersible pumps installed in an artificially lifted brown oil field located in southeastern part of Sudan, and to mitigate the causes in order to extend the pumps run life so oil production is increased and lifting costs are reduced. One of the standard failure finding procedures, known as Dismantle, Inspection, and Failure Analysis (DIFA) was used in this study to systematically tear down and inspect the failed pumps to find out the root cause of the failures. It was found that sand accumulation (stuffing) in the radial flow impellers was the cause of premature pump failures. The study has further elaborated on the technical reasons and justification as to why radial flow impeller pumps, despite their seemingly perfect design, were unable to produce sand while the mixed flow, under designed for the same well conditions, did. This finding was then experimented on many wells and proved to be correct as demonstrated in this paper. Eventually, the result was technically proved as being attributed to the geometrical shape of the impeller flow path. The study has then correlated sand stuffing failure with the flow path geometry of the impellers and eventually projected these results to an established specific speed model ($N_{s}$) with the recommendation of adopting a pump sizing approach in mild sand- -producing oil wells to cater for the geometrical flow configuration of the pump impellers.
Access status: Open Access ,
The impact of reservoir parameters and well construction on gas well productivity
(Wydawnictwa AGH, 2025) Blicharski, Jacek; Dybaś, Izabela
The aim of this paper was to present the influence of selected reservoir parameters and well construction on the productivity of a gas well, using the example of a natural gas reservoir with high nitrogen content. Data from an exemplary well were used to carry out a variant assessment of the productivity of wells at different stages of reservoir exploitation, taking into account single- and two-phase gas-condensate mist flow in the well. The reservoir development process is briefly described at the beginning. Subsequently, the issues of gas inflow to the well, gas flow in the well and nodal analysis were discussed. The last part of the paper focuses on the variant assessment of the productivity at different stages of reservoir exploitation using a computational algorithm for single-phase and two-phase gas-condensate mist flow in the well.
Access status: Open Access ,
Determination of mechanical parameters of salts in the cyclic load processes corresponding to the operation of a storage cavern for hydrogen
(AGH University of Science and Technology Press, 2021) Polański, Krzysztof
The paper describes the results of laboratory tests of the strength of salt samples made as part of the HESTOR project in order to determine the mechanical parameters of salt. The tests were carried out using an Autolab 2000 apparatus which allows to simulate any load cycles. The tests were made by simulating the operation of the hydrogen storage cavern. In order to observe the differences in salt behavior depending on the sample medium being stored during the test, gases were supplied: nitrogen, as an analogue of natural gas, and helium as a hydrogen analogue.
Access status: Open Access ,
Possibilities of using inclined boreholes in shallow drilling
(Wydawnictwa AGH, 2025) Kowalski, Tomasz; Artym, Rafał; Toczek, Przemysław
The article presents the possibilities of using inclined boreholes. Three cases were considered: backfill boreholes, hydrogeological boreholes, and borehole heat exchangers. The advantages and disadvantages of these solutions are described. In the case of an inclined backfill borehole, the time required for backfill material injection is minimized. In the case of an inclined hydrogeological borehole, the active filter area is increased, improving efficiency. In the case of inclined borehole heat exchangers, the unit power exchange with the rock mass is increased by increasing the length of the borehole in the layer with the best thermal conductivity.
Access status: Open Access ,
Possibilities of applying the vom Berg rheological model in research on polymer-modified drilling muds
(Wydawnictwa AGH, 2025) Skrzypaszek, Krzysztof
This article examines the potential application of the Vom Berg rheological model in the technology of polymer-modified drilling muds. In recent years, intensive research has been conducted at the Faculty of Drilling, Oil, and Gas to optimize procedures for selecting rheological models for technological fluids used in drilling operations. One of the key outcomes of this research is the proprietary RheoSolution methodology, applied in this study to assess the adaptability of the Vom Berg rheological model. Originally developed for analyzing the rheology of cement slurries in civil engineering, this model has been utilized here to describe the relationship between shear stress and shear rate in polymer-modified drilling muds. As part of the research, laboratory experiments were conducted at the Drilling Fluids Laboratory of the Faculty of Drilling, Oil, and Gas, focusing on drilling muds modified with xanthan biopolymer. The obtained results served as the basis for a comparative analysis of the classical API methodology and the proposed RheoSolution approach in determining the rheological parameters of the tested fluids. Special attention was given to the applicability of the Vom Berg model as a tool for a more precise characterization of drilling mud behavior under dynamic conditions. This article is part of a broader series of publications aimed at demonstrating the utility and potential advantages of the RheoSolution methodology in studies on the rheological properties of technological drilling muds.
Access status: Open Access ,
Separation of natural gas liquids and water from gas condensate
(AGH University of Science and Technology Press, 2021) Takerhi, Matthew Efe
Unlike dry gas reservoirs, condensate gas reservoirs contain a considerable amount of natural gas liquids which should be extracted to maximize energy usage. This paper uses Bryan ProMax to set up the processing units for the recovery of natural gas liquids and removal of water. The parameters for the simulation were a gas composition which assumes a sweet gas content. The outcome of the simulation includes reduction of water content below 7 lbm/MMscf, recovery of methane and recovery of propane and isobutane only. The glycol dehydration unit minimized water impurity, while cooling with Joule-Thomson valve and heat exchangers help in methane recovery and separation from natural gas liquids. The results show that natural gas liquid recovery which depends on gas composition can be recovered by controlling the conditions of several units, namely heat exchangers, flash vessels, cold separators, fractionators, stabilizers with their reboilers and condensers.
Access status: Open Access ,
Drilling mud influence on sandstone poroelastic parameters
(AGH University of Science and Technology Press, 2022) Knez, Dariusz; Rajaoalison, Herimitsinjo; Nkunzi, Donatille
Perhaps the most critical challenge faced during drilling operations is related to the stability of the well. Additionally, drilling mud plays a crucial role in wellbore stability, as one of its main uses is to support the wellbore wall during the drilling operation. However, ignorance of the effects of drilling mud on the mechanical properties of rock formation can also lead to well failure. The stability of the wellbore is also influenced by pore pressure during the drilling process. The analysis of changes in rock poroelastic parameters after drilling mud saturation was found to be useful regarding the abovementioned issues. Therefore, the measurement of the dynamic Young's modulus, Poisson's ratio and Biot's coefficient of sandstone samples was carried out to determine their trends of variations with confining pressure in different conditions such as dry, water and drilling mud filtrate saturation. The findings indicate that both the dynamic Young's modulus and the Poisson's ratio of the sandstone rock increased after saturation with water and drilling mud filtrate, while the Biot's coefficient was reduced. Furthermore, the velocity of the P wave, the dynamic Young's modulus and the dynamic Poisson's ratio of the sandstone rock were proportional to the confining pressure, while the Biot's coefficient were inversely proportional to the confining pressure. The results imply that effective stress calculation can be influenced by changes in poroelastic parameters established from geophysical measurements, and risk management of wellbore stability stability was increased.
Access status: Open Access ,
Simulations of the behavior of a pipeline made from three different types of materials on a landslide
(Wydawnictwa AGH, 2024) Kowalska-Kubsik, Iwona
The study presents numerical analyses of the behavior of pipelines made from various materials (steel, polypropylene, composite) under landslide conditions. Landslides are phenomena most commonly occurring in foothill and mountainous areas, and pipelines located on slopes can sustain damage during the landslide process. To determine the nature and extent of potential damage, numerical simulations were conducted based on advanced computational methods. The analysis employed the Drucker-Prager constitutive soil model. Numerical analyses make it possible to determine the deformation and stress states in pipelines without the need for costly experimental studies. By comparing simulation results for different materials, it is possible to assess the suitability of various pipes for placement on slopes.
Access status: Open Access ,
Deformation bands – migration pathways or barriers for hydrocarbons in sedimentary rocks – mini review
(Wydawnictwa AGH, 2023) Solecki, Marek
A mini review of the topic of deformation bands is presented in the paper. The concept of deformation bands is defined and their impact on the flow of fluids in porous sedimentary rocks is determined. Deformation bands are mm-thick low-displacement deformation zones which have intensified cohesion and lower permeability compared with ordinary fractures. This term was introduced in 1968 in material science, ten years later it appeared in the geological context. This microstructures can occur as barriers or migration pathways for hydrocarbons. Their role depends mainly on microstructural features, and they are also considered in reservoir modeling. The occurrence of deformation bands in Poland is also outlined and discussed - they have been described in Western Outer Carpathians (Magura and Silesia nappes).
Access status: Open Access ,
Analysis of hydrogen gas saturation in sedimentary sequences of Volyn-Podillya (Ukraine)
(Wydawnictwa AGH, 2025) Hubych, Ihor; Krupskyi, Yuii; Tsikhon, Serhii
With the aim of using hydrogen energy by the Ukrainian industry, the paper considers the general patterns of hydrogen distribution in the sedimentary sequences of Volyn-Podillya. The general features of the distribution of water-dissolved and sorbed gases in rocks within productive and water-saturated complexes are analyzed. The genetic relationships between individual components of natural gases have been established, which allows us to identify depth intervals where hydrogen predominates in the well section. The latter, when used for regional forecasting, makes it possible to establish zones, and thus directions for the search for hydrogen accumulations in the sedimentary cover in Volyn-Podillya.
Access status: Open Access ,
Activation of a dewatering well with the skinaut clay mineral disintegration agent
(Wydawnictwa AGH, 2024) Macuda, Jan
The drilling of hydrogeological boreholes by rotary methods and with the use of drilling mud impairs the permeability of water-bearing rocks in the near-hole zone. This is mainly caused by the penetration of solids and mud filtrate into the pores or fractures of the drilled rocks. Consequently, the depression increases, and the hydraulic efficiency of the borehole drops, leading to the reduction of well productivity. As a means of improving the damaged permeability of rocks in the near-hole zone, a clay mineral disintegration agent called SKINAUT was developed and patented. To evaluate its effectiveness in industrial conditions, a test was carried out to activate a dewatering borehole for intaking water from loose formations at the Szczerców open cast. The applied chemical helped to decolmatate the pore medium and lower the hydraulic resistance of the borehole, resulting in a reduction in depression and a significant improvement of its hydraulic efficiency.