Formela, Małgorzata Maria
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inżynieria środowiska, górnictwo i energetyka
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Item type:Article, Access status: Open Access , Application of fluidal ashes as a component of cement slurry used in carbon dioxide injection wells - possibility analysis(Wydawnictwa AGH, 2018) Formela, Małgorzata Maria; Gonet, Kamil; Stryczek, Stanisław; Wiśniowski, RafałOne of the most important environmental issues bothering scientists nowadays are greenhouse gases, mainly carbon dioxide, and the possibility of limiting their emission and utilization. Many countries have been actively trying to limit the greenhouse gases emission, mainly carbon dioxide, and implement the Carbon Capture and Storage (CCS) technology for years. One of the essential aspects of geological injection is constant monitoring of carbon dioxide, especially its pressure and temperature. Those parameters have an impact on viscosity, density and phase alterations during the flow. It is of vital importance to maintain the supercritical state of the fluid because it is the most efficient way of $CO_2$ storage. The negative impact of $CO_2$ on the properties of the cement slurry may disturb the exploitation of the well and create considerable hazard for the geological storage of carbon dioxide. Therefore, the cement slurry should be appropriately selected and the role of $CO_2$ in the development of technological properties of fresh and hardened cement slurry should be determined. The aim of this research is to select the most appropriate cement slurry composition exhibiting optimal properties with respect to the phase changes of carbon dioxide. The first part of the research consists in creating cement slurries of various compositions and investigating its thermal conductivity and sogginess under in-situ conditions. The second part concerns a possibility of utilization of fluidal ashes from combustion of lignite as a component of cement slurry.Item type:Book Chapter, Access status: Open Access , Effect of the HDD drilling mud on the environment(Wydawnictwa AGH, 2023) Druzgała, Angelika; Formela, Małgorzata MariaHorizontal Directional Drilling (HDD) is a trenchless method commonly used for laying various types of pipelines and cables. It is a common way of routing a technological line from one point to another by directional drilling under obstacles or in ecologically sensitive areas. The HDD can be used, for example, under rivers, roads or slopes where conventional excavation technologies would not be cost effective, reliable or may be environmentally invasive. One of the important elements influencing the success of horizontal directional drilling is a drilling fluid appropriately selected for the drilling conditions. The mentioned drilling fluid may, however, be a threat to the environment, therefore, in order to prevent it, it must be properly stored and disposed of.Item type:Article, Access status: Open Access , The improvement of mud displacement from the annular space of the borehole in terms of the selection of washing fluids and pre-flushes(AGH University of Science and Technology Press, 2021) Formela, Małgorzata MariaOne of the most important steps in drilling a well is cementing the annular space between the casing and the rock formation. This process is significant because of the stabilization of the well and effectively separation of the consecutive rock horizons. It is essential that cementing ensures the durable and effective insulation of the rock mass. The complete displacement of the drilling fluid from the annular space is particularly important due to a number of negative phenomena related to its insufficient extrusion. The cement slurry pressed through the annular space displaces the mud but is unable to thoroughly remove the residue left behind sufficiently. The subject of the laboratory research was to check how selected washer affect the efficiency of displacing drilling fluid from the annular space of the borehole. In addition, the tests included the determination of the optimal washing time and optimal pumping rate of the washing fluid.Item type:Article, Access status: Open Access , Selecting recipes of cement slurry for sealing casing columns in wellbores used for CCS(2016) Formela, Małgorzata Maria; Stryczek, Stanisław; Wiśniowski, Rafał; Pikłowska, AnnaCement 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.