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    Wyświetlanie 1-9 z 9
    Tytuł:
    Integrated model of hydraulic fracturing and hydro-carbon production
    Autorzy:
    Stopa, J.
    Wojnarowski, P.
    Janiga, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/298591.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    hydraulic fracturing
    reservoir simulation
    efficiency estimation
    Opis:
    The dynamics of discovering conventional hydrocarbon reservoirs has significantly dropped down in the World over the last ten years. Resources deposited in reservoirs having poor properties, where the production with economically justified yield is possible after prior enhancement (hydraulic fracturing in particular), become more important. Accordingly, proper designing of development works and hydraulic fracturing are decisive. Author's methodic and software for integrated modeling of hydraulic fracturing and production with the use of a3D fracture model are presented in this paper. This can be used for evaluating the efficiency of the fracturing treatment and its optimization. The results of hydraulic fracturing modeling were implemented in the reservoir simulator with the software written in C++. The designed fracture can be introduced into a numerical grid of a reservoir simulator. This tool can be a choice for a quick variant simulation for the best scenario of reservoir development selection. The practical implementation of this program was presented on the example of a ,tight gas' reservoir.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 1; 49-57
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of computer simulations to assess the effectiveness of the revitalization of mature oil fields using the selected reservoir as an example
    Autorzy:
    Podsobiński, D.
    Stopa, J.
    Wojnarowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298613.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    revitalization
    mature fields
    reservoir simulations
    Opis:
    The decrease in new oil field discoveries over the years makes it necessary to return to the abandoned partially depleted oil fields. Due to remaining significant amount of geological resources, mature oil field can be important in the overall balance. The production rate can be increased using various recovery methods. This paper presents a method of revitalizing mature oil fields used in Poland and wide world as well as screening criteria were presented. This article indicate the role of computer simulation as a tool in planning process of revitalization works in case of mature oil fields exploration and management. A recovery methods would be proposed, using computer simulation for the selected reservoir in south – eastern Poland as an example. The effectiveness of the recovery method would be determined through forecast of future production. An preliminary economic analysis would be performed to determine the feasibility of the seletected method taking into account the initial investment costs and different oil prices.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 1; 67-80
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microscale modeling of CO2-EOR process in coupling with laboratory measurements
    Autorzy:
    Janiga, D.
    Czarnota, R.
    Stopa, J.
    Wojnarowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298593.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    CO2-EOR
    microscale simulation
    relative permeability
    Opis:
    Application of enhance oil recovery methods (EOR) as carbon dioxide injection (CO2-EOR) can increase technological or economical production indicators. For the evaluation of process effectiveness, full scale simulation model is used. Numerical models require large number of high quality geological and production data. However, the necessary data may be uncertain therefore microscale laboratory experiment and modeling can provide a knowledge to understand the fluid flow phenomena. In this paper the authors propose an integrated decision model coupling laboratory measurements of displacement with the numerical simulation of flow. First step consists of routine rock properties determination, after that core sample geometry, porosity and permeability were reconstructed in numerical reservoir simulator. Simple core model was combined with relative permeability measurements for oil - water and oil - carbon dioxide as well as fluid properties. Calibrated to laboratory measurements simulation model was used to analyze the process of CO2-EOR and evaluation of its effectiveness depending on technological parameters.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 1; 37-47
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Predicting relative permeability from experimental capillary pressure porous plate test for two phase flow
    Autorzy:
    Czarnota, R.
    Janiga, D.
    Stopa, J.
    Wojnarowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298727.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    capillary pressure
    relative permeability
    crude oil
    multiphase flow
    Opis:
    Relative permeabilities relationships as a function of fluids saturation are one of the most important parameters for describing multiphase flow processes in reservoir rocks. When direct laboratory tests are not available for investigating oil-water multi-phase flow in rocks, then indirect prediction techniques using relative permeability functions are widely used, e.g. from capillary pressure test. In this study the measurement of capillary pressure was performed on rocks plugs with different characteristics at reservoir conditions using porous plate method. During measurement semi-permeable membrane was used with 15 bar threshold pressure, what allowed to register formation water saturation, at changing differential pressures steps. Desaturation at each pressure stage was continued until no more produced liquid was observed. Water saturation point at maximum capillary pressure applied is assumed to be final irreducible water saturation. Application of porous plate method provides sufficient stabilization time, allowing to achieve uniform saturation distribution. In this research, Brook-Corey model was used to predict relative permeability from experimental measured capillary pressure data for oil-water phase flow in porous media. As a result, it is possible to obtain more accurate capillary pressure outcomes, and relative permeability curves for the two-phase system, than other methods used in practice. Performing capillary pressure measurements at reservoir conditions, allows to restore the processes occurring in the reservoir.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 2; 323-334
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oil production technology for unconventional reservoirs
    Autorzy:
    Stopa, J.
    Czarnota, R.
    Wojnarowski, P.
    Janiga, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/299263.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    unconventional oil reservoirs
    method of exploitation
    hydraulic fracturing
    Opis:
    Interest in the subject related to the oil production from unco nventional hydrocarbons has increased in recent years. Operation of such reservoirs requires the use of the state-of-the-art technology. Definitely, drilling horizontal and multilateral wells in conjunction with hydraulic fracturing and acidizing meet that requirement. This paper discusses the most important from the author’s view issues, including art ificial lift systems, connected with oil production from unconventional reservoirs around the world and its applica bility for Polish hydrocarbons reservoir.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 3; 581-587
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of well placement and control to maximize CO2 trapping during geologic sequestration
    Autorzy:
    Stopa, J.
    Janiga, D.
    Wojnarowski, P.
    Czarnota, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/298725.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    CO2 sequestration
    optimization
    numerical simulation
    Opis:
    The CO2 injection into geological formations such as saline aquifers can be effective method of sequestration enabling efficient immobilization of gas by surface and capillary forces. The main objective of presented method of optimization was to determine optimal well position and injection rates that maximize residual trapping. This would mitigate the risk of the CO2 leakage outside of storage zone. A genetic algorithm and particle swarm optimization have been developed and coupled with reservoir simulator to optimally examine various placement and injection control strategies for vertical as well as horizontal well. Optimization was carried out in 3D heterogeneous real field model with water-CO2 -formation rock relationship. Numerical examples confirm that developed algorithm can find a promising optimal solution effectively within a partial number of simulation runs.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 1; 93-104
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory measurement of wettability for Ciężkowice sandstone
    Autorzy:
    Czarnota, R.
    Janiga, D.
    Stopa, J.
    Wojnarowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298866.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Ciężkowice sandstone
    rock wettability
    oil fields
    Opis:
    The type of reservoir rock wettability is one of the most important factors affecting flow of formation fluids in rock pores. It impacts on the characteristics of capillary pressure curves and residual oil saturation, what result in final recovery factor. There are generally, four differ states of wettability for hydrocarbon fields. These are: water wet, oil wet, mixed and fractional. For determination of wettability both quantitative and qualitative methods are implemented. In presented work, the results of wettability laboratory measurement for Ciężkowice sandstone by Amott–Harvey has been shown. Obtained outcomes underline the influence of wettability phenomena on the recovery factor for Carpathian hydrocarbon fields, where Ciężkowice sandstone is the oil bearing formation. The proper understanding of the wettability of reservoir is essential for determining the most efficient way of oil production.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 1; 167-172
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of capillary trapping during geologic CO2 sequestration
    Autorzy:
    Knapik, E.
    Janiga, D.
    Wojnarowski, P.
    Stopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298959.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    capillary trapping
    CO2 sequestration
    relative permeability hysteresis
    Opis:
    Capillary trapping is thought to be one of the primary CO2 fixing mechanisms in a porous medium when it is stored. While CO2 is injected, gas displaces formation water (brine) in the process called drainage. In the case of the rock mass wetted by water, formation water remains adsorbed in wall pores and micropores. Once the injection process has been completed, gas is displaced by the natural water in the process referred to as imbibition. In that way CO2, being a non-wetting phase, is held in the form of dispersed bubbles as an immobile phase. The process occurs fast and allows for a regular storage of large amounts of CO2. The process is dependent upon numerous parameters, including capillary pressure and contact angle, but such measurements cannot be easily taken for rock cores in reservoir conditions. Another problem is the fact that it is difficult to separate the impact of such mechanisms as dissolution and mineral trapping. So far capillary trapping has been deeply analyzed in terms of hydrocarbon recovery and contaminant remediation. The goal of this article is to:– present a physiochemical basis of capillary trapping in CCS context,– simulate the impact of relative permeability hysteresis on geological CO2 storage.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 4; s. 657-669
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intelligent control of CO2-EOR process
    Autorzy:
    Mikołajczak, E.
    Stopa, J.
    Wojnarowski, P.
    Janiga, D.
    Czarnota, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/298639.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    CO2-EOR
    production optimization
    intelligent control
    artificial intelligence
    Opis:
    One of the enhanced oil recovery methods, which enables to recover an additional 15–20% of oil resources is the CO2-EOR method based on carbon dioxide injection into partially depleted reservoirs. Determination of the optimal process control facilitates effective use of natural resources. The idea of this paper is to develop an algorithm that optimizes the CO2-EOR process. This algorithm is based on the combination of artificial intelligence, control theory and computer simulation of hydrocarbon reservoirs. The effect of the proposed solution is the CO2-EOR process control, which is optimal in the case of the adopted objective function expressing the economic value of the project. The obtained results suggest that the use of artificial intelligence methods in the hydrocarbon production allows to improve the process efficiency by an additional 31% compared to the project carried out with the use of engineering knowledge.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 235-243
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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