Artykuły (CN-drill)
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Artykuły czasopisma AGH Drilling, Oil, Gas
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- ArtykułOtwarty dostępLaw of development turbulent non-isothermal jet flow in pit oil(Wydawnictwa AGH, 2012) Ajsaev, Satžan Uškanbaevič; Žapbasbaev, Uzak K.; Turegeldiyeva, KarlygashThis paper reviews development of turbulent non-isothermal round jet flow in pit oil. Increasing requirements for environmental protection challenge the oil industry to minimize the oil spill accidents throughout the production and transportation processes. Hydrodynamic interaction of pit oil with flow is in reasonable agreement with data of industrial tests. The authors prove law of development turbulent non-isothermal jet flow in pit oil. In this paper a mathematical model was designed and numerical simulation of turbulent non-isothermal flow in pit oil was performed. The mathematical method is based on the non-isothermal fluid flow in pit oil using solution of Reynolds-averaged Navier-Stokes equations and equations of the k-symbol model of turbulence. The developed model has been validated with experimental data. Numerical simulation calculation results were found to be in reasonable agreement with data obtained from the experiments. Turbulent (molar) transfer is important in flow part and vortex zone of reverse flow. In the other part convection and molecular mechanism of momentum and heat transfer dominated. The developed mathematical model and numerical simulation methods are used to study the process of heating pit oil by hot fluid flow. In technical aspect it allows to determine the mass of heated pit oil which is used in thermo-mechanical technology of gathering spilled oil.
- ArtykułTylko metadaneGeomechanical properties of shale rock from Baltic Basin in Poland area(Wydawnictwa AGH, 2015) Laura, AnastasiâThe successful development of shale gas requires a fundamental understanding of shales and that can be challenging because these rocks vary significantly. For recoverable shale gas resources assessment a broad range of geological, geochemical, geophysical and geomechanical data is required. Information about the variable lithologies, mineralogies, and kerogen content is vital to locate favorable intervals for gas production. Knowledge of the in-situ stresses and porosity of these intervals is essential for developing hydraulic fracturing strategies to recover the gas in place. Geomechanical properties of shales are important in terms of determination of the likelihood of fractures initiating and propagating in shale materials. Geomechanical properties of rock include: Poisson's Ratio, Total Minimum Horizontal Stress, Bulk, Young and Shear Modulus. These properties play significant role in developing shale assets. Having access to geomechanical data can assist engineers and geoscientists during geomechanical modeling, hydraulic fracture treatment design and in some cases during reservoir modeling in shale gas fields. This paper is intended to give characterization of geomechanical properties of shale rock. It then refers to a case study of Baltic Basin of shale gas in Poland, for discussing it geological condition and rock properties.
- ArtykułTylko metadaneTerrestrial and extraterrestrial drillings in the 21st century. Research challenges and the way to satisfy them by means of a new research infrastructure at AGH-UST(Wydawnictwa AGH, 2020) Kowalski, Tomasz; Skrzypaszek, Krzysztof; Teper, Wojciech; Toczek, Przemysław; Złotkowski, AlbertKnowing the impact of technical solutions on the drilling process is a very important element in the process of the exploration of new fossil fuel deposits. Drilling equipment used during drilling operations is highly liable to all conditions which prevail in the well bore. The study of the impact of drilling fluid flow with various rheological properties on the strength and work of drill stem components will allow to search for the best solutions. The article describes the design and construction of two boreholes, fill up with 9 5/8" (244.5 mm) and 24" (609.6 mm) casings. The designed boreholes will be a joint part of the drilling laboratory in the S-1 building at AGH-UST in Krakow. Research The research described above can be done in openholes and implemented at the beginning of the design process for drilling works in new deposits. In addition, it will provide an opportunity for all engineers to get to know the behavior of components operating in an open hole.
- ArtykułTylko metadaneWater resources and climate change - groundwater as an alternative source of water supply(Wydawnictwa AGH, 2020) Winid, Bogumiła; Chruszcz-Lipska, Katarzyna; Maruta, Michał; Solecki, MarekIn recent years, the world, including Europe, has seen a much higher incidence of extreme weather phenomena. The ongoing climatic changes have a direct impact on the condition of surface waters. Groundwater is less affected by anthropogenic pollution than surface water, since groundwater can be used in distribution systems for municipal purposes, for food purposes, sold in unit packages, and for medicinal purposes (in drinking and bathing treatments). In Poland, a country with poor water resources, the problem of water scarcity due to climate change may even increase. One solution to this problem may be the increased use of Polish groundwater re? sources. Hydrogeological conditions favorable to the construction of drill wells, detailed identification of available groundwater resources throughout the country and the low degree of their usage (25% on average) make it possible to increase the intake of groundwater to cover this water deficit, especially in periods of drought.
- ArtykułTylko metadaneDrilling intake wells in carbonate formations to provide water for drilling purposes(Wydawnictwa AGH, 2020) Macuda, Jan; Łukańko, ŁukaszThe realization of drilling works oriented towards the prospection and extraction of hydro- carbons from conventional and unconventional resources requires the supply of large amounts of water for technological purposes and fracturing jobs in shale formations. One of the important sources of water supply for wellbores may be useful groundwater levels taken in by deep wells. Technological processes accompanying drilling works and other technological operations require large amounts of water in a short period of time. The possibility of drilling intake wells at the drilling site significantly reduces the costs of acquiring the necessary quantities of water and facilitates its transfer to technological installations. Such wells must have high yields. Accordingly, this necessitates drilling wells with a relatively large diameter to accommodate filters with a large active surface area, a considerably thick gravel pack, and a high-capacity pumping unit. Drilling large diameter intake wells in difficult geological conditions using the rotary percussion method with simultaneous casing is much more efficient than the water-based rotary mud or percussion methods used to date. This paper presents principles for selecting technological parameters of drilling large diameter wells in difficult geological conditions using the percussion-rotary method with simultaneous casing. Among the main advantages of this method (as compared to the rotary method with drilling fluid) is its high RPM and the related lower cost of the well. Eliminating water?based drilling mud has a positive effect on the hydraulic efficiency of the well and enhancement work can be omitted in many cases.
