Wiśniowski, Rafał
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inżynieria środowiska, górnictwo i energetyka
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Item type:Article, Access status: Open Access , Linear Swelling Test (LST) of clay formation under the influence of newly developed drilling fluids with the addition of cationic polymers(2015) Wysocki, Sławomir; Wiśniowski, Rafał; Ryznar, Dawid; Gaczoł, MagdalenaThis paper shows research of Linear Swelling Test (LST) of shale rocks under the influence of three drilling muds with different cationic polymers. Tested polymers have been synthetized at the Drilling, Oil and Gas Faculty of AGH UST Krakow. Research findings indicate that synthesized polymers as well as developed on its base drilling fluids effectively inhibit hydration and prevent the disintegration of clay formation.Item type:Article, Access status: Open Access , The methods of pressures prediction based on geophysical data(2015) Wiśniowski, Rafał; Toczek, PrzemysławPrediction of reservoir pressure and so its values at an early stage of wellbore designing significantly increases the profitability of exploration and production wells design. The prediction of rock mass pressures can be performed in a number of ways. The prediction methods have been reviewed since the 1950s. The methods of empirical forecasting of pressures proposed by Eaton B.A. as well as Hottman and Johnson were described in the paper. The paper also refers to the prediction of rock mass pressures on the basis of seismic well log results obtained from works performed on the same geologic unit. A relation between basic parameters of rocks along the wellbore profile is shown. The Eaton method was used for empirical determining pressure for a planned well based on seismic data form the existing well.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:Article, Access status: Open Access , The influence of anti-sedimentation agents on the technological parameters of cement slurry(Wydawnictwa AGH, 2017) Kremieniewski, Marcin; Rzepka, Marcin; Stryczek, Stanisław; Wiśniowski, RafałRecently, the intensifying development of shale drilling has contributed to the more numerous realization of directional and horizontal boreholes. Moreover, such boreholes are more advantageous as they provide about 4 times higher production than in their vertical counterparts, give access to poorly drained areas, or production of already developed reservoir, where only a new borehole has to be introduced to the network. It should be stressed that the sealing of the casing columns is a challenge because of the restrictions set before drilling fluids used for sealing horizontal boreholes. Slurries play a special role while sealing horizontal boreholes and therefore their technological parameters and density should be adjusted to the geological-reservoir conditions. At the stage of designing slurries for sealing horizontal boreholes, the most important parameters are: sedimentation stability, zero water settling water settling and low filtration. Meeting these requirements was possible by selecting proper admixtures and additives, which in turn, is a guarantee of the uniform and homogeneous structure of fresh and hardened cement slurry. Thus formed cement sheath of bounded slurry should be impervious to gas and have good mechanical properties over the length of the sealing without any trends of anisotropy of the medium in particular points. Modification and designing specialist recipes for definite technological conditions lie, among others, in choosing proper slurry additives and admixtures. However, obtaining appropriate parameters for given conditions may be connected with a change of other parameters deciding about the efficiency of the sealing of a given horizon. Therefore while working out a new recipe for a slurry, the designer should account for the analytical results and influence of the applied agents on all of the parameters of slurry. This is the subject matter of the paper.Item type:Article, Access status: Open Access , Total Specific Energy (TSE) as a new indicator of drilling efficiency(Wydawnictwa AGH, 2017) Toczek, Przemysław; Wiśniowski, Rafał; Stryczek, Stanisław; Ziaja, Jan; Mazur, ChrystianKnowing the data from drilling works which had been carried out in a given area gives the opportunity to develop the next borehole with great precision. An important element of the design is to analyze and interpret data in detail, which can be used during the following drilling process. Based on a literature analysis, certain methods of the selection of drill bits have been indicated. Mechanic specific energy curves of drill bits applied in drilling works in northern Poland have been compared. The drilling works took place in the Precambrian platform. The compared mechanic specific energy curves were calculated with the use of R. Teale and H. Rabia equations. A relation between mechanical specific energy and pressure loss in polycrystalline diamond compact drill bits was determined. New drilling ratio TSE - Total Specific Energy which considers hydraulic power energy in the nozzles of the drill bit was calculated.Item type:Article, Access status: Open Access , Drilling mud for shale gas drilling(2015) Kędzierski, Miłosz; Wysocki, Sławomir; Wiśniowski, Rafał; Uliasz, Małgorzata; Zima, GrzegorzThe selection of the relevant components the drilling of 5mud can reduce the occurrence of negative physical-chemical phenomena observed between shales and drilling mud. The purpose of laboratory examination was to estimate the impact of different polymer inhibitors for hydration of clays and shales. A laboratory test were performed in order to estimate the concentration of polymer inhibitors in preventing the phenomena taking place in contact with the shale rocks – drilling mud. Also, research the influence a drilling fluids containing different kinds of hydration inhibitors on swelling and clays and shales dispersion.Item type:Article, Access status: Open Access , The influence of ash from fluidized-bed combustion of lignite on rheological properties of cement slurries(2014) Skrzypaszek, Krzysztof; Stryczek, Stanisław; Wiśniowski, RafałCementing jobs are a very important element of drilling technology considering the completion of a given field. The selection of an appropriate recipe for sealing slurry is a challenge for the cementing services and research units. Both fresh and set slurry should meet a number of technological requirements. Various chemical, physical and mechanical properties of the ground and rock mass media to a different degree influence the technological parameters of the injected fluid. The sealing slurries have to meet certain criteria if the high efficiency of works is to be provided. The first of them is the criterion of physicochemical congruence with the environment. The second condition stems from the criterion of pumping the slurry. It is realized by selecting an appropriate rheological model and rheological parameters of the sealing slurry. The third requirement is connected with the need of providing suitable strength and durability of hardened sealing slurries as a result of the physicochemical processes. The fourth condition should account for the economy and ecology factors. The selection of recipes for sealing slurries should not be accidental or an output of unfniished laboratory tests. The correct sealing and reinforcing of the rock mass are prerequisites of further engineering works performed in the wellbore. The results of laboratory experiments on the concentration of ash from the fluidized-bed combustion of lignites on rheological parameters of fresh sealing slurries based on drilling cement class G (HSR) Dyckerhoff (API Class G HSR - Black Label) for various water/cement ratios are presented in this paper.Item type:Article, Access status: Open Access , The influence of ionic hydration inhibitors on dual inhibitor system mud properties – clay rock swelling(2016) Wysocki, Sławomir; Wiśniowski, Rafał; Gaczoł, Magdalena; Nowak, WiktorVarious organic and inorganic compounds can be used as the hydration inhibitors. The main purpose of this paper is the examination of five different ionic hydration inhibitors: $KCl$, $K_{2}CO_{3}$, $HCOOK$, $NH_{4}Cl$, $CaCl_{2}$. The paper contains survey findings of the influence of the abovementioned inhibitors different concentrations on technological parameters of drilling muds with dual inhibitor system and swelling of clays.Item type:Article, Access status: Open Access , An application of organic nanosilica to cement slurries based on Portland cement(2015) Jamrozik, Aleksandra; Stryczek, Stanisław; Wiśniowski, Rafał; Gonet, Andrzej; Wójcik, RafałMore and more attention is paid nowadays to the quality and durability of the applied cement slurries. Apart from the appropriate rheological, technological and strength parameters, the slurry should be resistant to the strongly mineralized reservoir waters. Appropriate phase composition of cement slurries, especially high CSH content is responsible for the change of pore structure in the cement slurry; the number of fine gel pores which are not available for the fluid increases and the number of capillary pores responsible for the transport of corrosive factors inside the cement slurry decreases. The use of nanosilica as an additive improving the properties of cement slurries has recently gained popularity. Bearing in mind these properties of nSiO2, there were conducted laboratory experiments on the use of organic nanosilica for cement slurries based on Portland cement CEM I 52.5 R.Item type:Article, Access status: Open Access , The influence of selected liquefiers on the rheological parameters of cement slurries(Wydawnictwa AGH, 2017) Stryczek, Stanisław; Gonet, Andrzej; Wiśniowski, Rafał; Złotkowski, AlbertThe rheological properties of sealing slurries are very important when designing and executing cementing jobs and reinforcing ground and rock mass with the use of drilling technology. In order to ensure a high level of efficiency, the applied sealing slurries should meet several requirements. One of the most important criteria is pumpability. The rheological model and the rheological parameters of the sealing slurries should be properly selected to ensure efficient pumping. On this basis the flow resistance of the slurry in the circulation system can be calculated. The paper presents the results of laboratory experiments on the influence of some liquefiers on the formation of rheological properties of cement slurries used for sealing and strengthening rock mass, and for cementing jobs.