AGH Drilling, Oil, Gas
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ISSN 2299-4157
e-ISSN: 2300-7052
Issue Date
2016
Volume
Vol. 33
Number
No. 3
Description
Journal Volume
AGH Drilling, Oil, Gas
Vol. 33 (2016)
Projects
Pages
Articles
Percussion-rotary method of drilling large-diameter dewatering wells in »Bełchatów« liginte mine
(2016) Gasiński, Jerzy; Macuda, Jan; Kaczmarek, Tomasz
Lignite opencast extraction can be performed after prior dewatering of the rock mass. Most frequently it is realized with large-diameter dewatering wells which have been mostly drilled with the invert mud rotary method and airlift. This method allows for quick drilling in lithologically diversifi ed aquifers, minimizing the negative impact of mud on the near-well zone. When drilling in dewatered carbonate rocks with the stone runs or well developed karst the effi ciency of this method considerably decreases. The technical and technological aspects of use of downhole hammers for drilling large-diameter dewatering wells in diffi cult geological conditions are discussed in the paper. Thanksto the use of this method for drilling wells in ‘Bełchatów’ Lignite Mine the drilling rate could be increased and the number of complications and drilling failures lowered.
The analysis of heating output evaluation methods for borehole heat exchangers
(2016) Śliwa, Tomasz; Grygieńcza, Andrzej; Bieda, Anna; Sapińska-Śliwa, Aneta; Gonet, Andrzej; Jaszczur, Marek; Kowalski, Tomasz Wojciech
Projects involving borehole heat exchangers more often need to undergo a series of tests before implementation. Inserted pipes and cement in the borehole may have diff erent thermal properties. Until recently, such values were determined in approximate, based on values taken from the literature. Special methods are used more often to perform this type of work in order to correctly determine the properties of a borehole heat exchanger. The aim of the study was to present an analysis of thermal properties of borehole heat exchangers with the main emphasis on parameters such as thermal conductivity and thermal resistance.The analyzed data was obtained through the use of three methods:– analysis of the lithological profi le with rock conductivity based on the literature,– analysis of natural temperature profi le in aborehole heat exchanger (logger NIMO-T),– thermal response test.
Comparison of gas migration test and building structural strength of slurry in the aspect of limiting gas invasion
(2016) Kremieniewski, Marcin; Rzepka, Marcin; Stryczek, Stanisław; Wiśniowski, Rafał
The problem of eliminating natural gas microflows through the cement slurry while bonding has been investigated by scientists in a number of scientific and research centers. Works have been undertaken to define the causes of gas migration and predict possibilities of interchannel communication in the hardened cement slurry. In the course of bonding cement slurry changes its state from liquid through gel to solid. Accordingly, the gas migration effects should be taken into account in the formation of these phases.The results of tests of gas migration in the course of binding and building structural strength have been presented in this paper. Both research methods have been compared and a high dependence of parameters defined by each of them has been found. The research works were conducted with the use of innovative apparatuses thanks to which the phenomena taking place in the course of binding can be observed. This gives the possibility of working out recipes of sealing slurries applicable to deposits where the risk of occurrence of gas migration is high.
Selecting recipes of cement slurry for sealing casing columns in wellbores used for CCS
(2016) Formela, Małgorzata Maria; Stryczek, Stanisław; Wiśniowski, Rafał; Pikłowska, Anna
Cement sheath serves primarily as a zonal isolation for the life of the well while protecting and supporting the casing. Nowadays, more and more solutions in the term of different cement slurries compositions appear on the market. One of them is application of fluid ashes as an alternative substitution of cement itself. The purpose of it is to overcome a challenging environment where a high concentration of corrosive gases or fluids exist. An example of that aggressive substance is carbon dioxide. Moreover, this is how it might reduce the cost of the cementing process. Laboratory research was conducted at the Drilling, Oil and Gas Faculty and Materials Science and Ceramics Faculty at AGH University of Science and Technology in Krakow.
An application of a Raman scattering analyzer for the determination of natural gas composition at a processing plant
(2016) Włodek, Tomasz; Kuczyński, Szymon; Smulski, Rafał; Polański, Krzysztof
The development of conventional and unconventional natural gas reservoir management includes continuous monitoring of hydrocarbon exploitation processes and its impact on the reservoir and environment. Raman spectroscopy, which allows for the identification of reservoir fluids (including natural gas) components can be a very promising method for the application of providing a quick, non-invasive, nondestructive analysis.The proposed in this paper measurement methods are focused on the use of: – a laboratory cell (autoclave) with sapphire window mounted on a specially prepared bypass pipeline; – a dedicated Raman probe mounted to the available installed stub pipe; – the construction of a special measurement cell.The article presents the basic technical assumptions for measurements of the composition of natural gas with the use Raman spectroscopy.