Browsing by Subject "drilling fluids"

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Access status: Restricted ,
Analysis of chosen wellbore stability elements
(Data obrony: 2013-06-26) Yurych, Lidiia
Wydział Wiertnictwa, Nafty i Gazu
Access status: Open Access ,
Application of PT-84 polymer in HDD mud - lab research
(2011) Kowalczyk-Cudak, Danuta; Ropka, Anna; Wysocki, Sławomir
One of the most important in HDD technology is a drilling mud with specific properties. In this paper the results of PT-84 polymer application in HDD drilling mud are presented. Tested mud characterize with good technological properties, it gives good perspectives of industrial development.
Access status: Open Access ,
Complex reservoir drilling fluid solutions for reservoir drilling
(Wydawnictwa AGH, 2019) Szczygieł, Andrzej
Drilling into a pay zone with a conventional fluid can introduce a host of previously undefined risks, all of which diminish reservoir connectivity with the wellbore or reduce formation permeability. This is particularly true in horizontal wells, where the pay zone can be exposed to the drilling fluid over a long interval. Selecting the most suitable fluid system for drilling into the pay zone requires an understanding of the reservoir. Using data generated by lab testing on core plugs from carefully selected pay zone cores, a reservoir-fluid-sensitivity study should be conducted to determine the morphological and mineralogical composition of the reservoir rock. Natural reservoir fluids should be analyzed to establish their chemical makeup. The degree of damage that could be caused by anticipated problems can be modeled, as the effectiveness of possible solutions for mitigating the risks. In addition to being safe and economical for the application, a Reservoir Drill-In Fluid should be compatible with the reservoir's native fluids to avoid causing precipitation of salts or emulsions production. A suitable nondamaging fluid should establish a filter cake on the face of the formation and shouldn't penetrate too far into the formation pore pattern. The fluid filtrate should inhibit or prevent swelling of reactive clay particles within the pore throats. Formation damage commonly is caused by: - Pay zone invasion and plugging by fine particles. - Formation clay swelling. - Commingling of incompatible fluids. - Movement of dislodged formation pore-filling particles. - Changes in reservoir-rock wettability. - Formation of emulsions or water blocks. Once a damage mechanism has diminished the permeability of a reservoir, it seldom is possible to restore the reservoir to its original condition.
Access status: Open Access ,
Drilling fluids for drilling in shale and clay rocks
(2015) Wiśniowski, Rafał; Uliasz, Małgorzata; Zima, Grzegorz; Wysocki, Sławomir; Gaczoł, Magdalena
Clay shale rocks large intervals drilling generates a serious issues caused by hydration, swelling and dispersion of clay rock. Those reactions might lead to break-downs and complications in drilling as the consequences of borehole wall stability loss that have source in cave effect (occurrence of caverns and cavings) and borehole diameter sharp decreasing. Therefore, the outcomes of the research that have been undertaken are muds formulas adjusted for drilling various clay rock intervals.
Access status: Open Access ,
ECD optimization with specially designed low rheology drilling fluids
(2017) Wiśniowski, Rafał; Skrzypaszek, Krzysztof; Kiebzak, Piotr
This article presents a method in which low rheology drilling muds are used as a solution for demand ing wellbore pressure management and high Equivalent Circulating Density (ECD) values. In order to investigate this problem series of numerical simulations were conducted. Real, field data from two already accomplished wells was used to recreate actual wellbores conditions in Halliburton Landmark Drilling Software and to calculate ECD values. In order to check and confirm the program’s results accuracy, the outcomes were compared with pressure while drilling (PWD) equipment surveys results made during drilling operations. Next, simulations were made in order to check how low rheology parameters of drilling muds will impact overall ECD values. Additionally in the article are included field tests results from Hibernia Platform, prepared by Bolivar, Joung et al. in 2007 where specially treated (TMSB) low rheology drilling fluids was used to mitigate lost circulation issues and extensive ECD values. Both researches’ results indicate that low rheology drilling muds may solve ECD optimization problems while still maintaining required properties and executing tasks of drilling fluids.
Access status: Open Access ,
Influence of ionic hydration inhibitors on dual inhibitor system mud properties – technological parameters
(2016) Wysocki, Sławomir; Wiśniowski, Rafał; Gaczoł, Magdalena; Nowak, Wiktor
Various organic and inorganic compounds can be used as 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 the survey findings of the influence of the above mentioned inhibitors different concentrations on technological parameters of drilling muds with a dual inhibitor system and swelling of clays.
Access status: Open Access ,
Influence of ionic hydration inhibitors on triple inhibition system mud properties – clay rock swelling
(2017) Wysocki, Sławomir
Recently past years, while drilling clay rock, mainly mud with triple inhibition system is applied. In the light of abovementioned fact, it can be seen growing importance of studies related to improvement and development of this type of mud formulas. The paper describes undertaken studies of QSE Pellets swelling and linear swelling (LST) of the Miocene shale under influence of different concentration of chosen clay rock hydration inhibitors in mud with triple inhibition system.
Access status: Open Access ,
Influence of ionic hydration inhibitors on triple inhibition system mud properties - technological parameters
(2017) Gaczoł, Magdalena
Clay rock hydration is primary reason of borehole wall instability during drilling. In correspondence to this fact, it is substantial to counteract abovementioned phenomenon. It can be achieved e.g. applying ionic hydration inhibitors in the drilling mud formula. From the point of view of drilling effectiveness, the most practical is water based inhibitive mud. Its stabilizing properties are partially effect of soluble salts and low concentrations of polymer. This type of the mud exhibits good rheological properties and causes, in most of cases, increased rate of penetration (ROP). Ionic inhibition contribute to reduction of both dispersion and hydration of clay rock due to decreased instability of shales containing swelling clays. Hydration degree depends on the type and concentration of inhibitive ions in the drilling mud. This paper describes studies on influence of the chosen inhibitors ($KCl$, $K_{2}CO_{3}$, $HCOOK$, $CaCl_{2}$) on technological parameters of the developed drilling muds with triple inhibition system. Obtained results indicate good parameters of the mud. For $HCOOK$ and $CaCl_{2}$ increase of the inhibitor concentration causes major changes in mud parameters, however for $K_{2}CO_{3}$ and $KCl$ those parameters do not change significantly.
Access status: Open Access ,
New mud for hydrogeological drilling
(2016) Macuda, Jan; Wysocki, Sławomir; Gaczoł, Magdalena
A major source of valued water are groundwater deposits. Therefore, constantly growing water demand requires greater focus on the subject of hydrogeological drilling. The primary requirements for groundwater drilling are: protection of important aquifers as well as formations being drilled and further easy removal of the mud residues during well development. Both aspects are connected to mud ingredients and additives selection. This necessitates an improvement of drilling fluid formula for most effective borehole drilling and successive exploitation. This article concentrates on the drilling fluid for hydrogeological drilling. In order to validate the practical utility of developed mud, laboratory research was conducted. An analyses of the outcomes expose the mud improving drilling process and fulfilling above mentioned requirements.
Access status: Open Access ,
New mud for UnderBalanced Drilling
(2016) Wysocki, Sławomir; Gaczoł, Magdalena; Wysocka, Marta
This paper describes a research finding of drilling mud designed for UnderBalanced Drilling. The UnderDril mud formula is based on a low number of compatible components, therefore it enables uncomplicated adjustment of its technological parameters to specific conditions and contributes to the reduction of its application costs. Moreover, the UnderDril mud is composed of biodegradable ingredients, that results in a beneficial effect on the possibility of its utilization and simultaneously makes it hazardous free for the environment.The conducted research showed that the abovementioned mud can find an industrial application.
Access status: Open Access ,
Numerical simulation of drilling fluid flow in annular the space of the borehole
(2015) Kowalska-Kubsik, Iwona
This paper presents the numerical results of a numerical analys is of drilling fluid flow through annular space in the borehole. The analysis used the Herschel–Bulkley rheological fluid model. The obtained results of the analysis for three cases with variable geometry. Variable geometry is associated with a larger diameter drill in the joints of drill pipes, and consequently, with reduced flow cross-section. A comparison of pressure values at the end of the analyzed examples showed that in the example of a simple drill pipe with out joints, pressure values were 30% higher than in the case, which takes into account changes in the geometry of the joints.
Access status: Open Access ,
Possibilities of applying the extended eyring rheological model in the technology of cement slurries used in oil drilling
(Wydawnictwa AGH, 2024) Skrzypaszek, Krzysztof
This study explores the feasibility of implementing an extended Eyring rheological model to describe the dependence between shear stress and shear rate in cement slurries used in drilling technologies. Advances in cement slurry technology have rendered traditional mathematical models, particularly the widely used linear Bingham model recommended by the API RP 13D (American Petroleum Institute Recommended Practice 13D) standard, insufficient for accurately predicting flow resistance during pumping operations. A misalignment between the model and the actual behavior of cement slurries can result in significant errors, potentially increasing operational costs. By identifying and applying the relevant rheological model, it is possible to optimize the system’s performance, minimizing total pressure losses and thereby reducing overall drilling costs. This paper investigates the applicability of more sophisticated three-parameter rheological models, commonly utilized in other engineering disciplines, to address these challenges. Specifically, the extended Eyring model was adapted to the proprietary RheoSolution methodology developed by the Department of Drilling, Oil and Gas. To validate this approach, a series of laboratory tests were conducted on cement slurries widely used in the oil industry. The results were analyzed and compared against mathematical models recommended by the API standard. The findings confirm that the extended Eyring model offers superior accuracy in determining the rheological parameters of cement slurries for drilling applications, underscoring its potential as a robust tool for improving the efficiency of drilling operations.
Access status: Open Access ,
Possibilities of applying the vom Berg rheological model in research on polymer-modified drilling muds
(Wydawnictwa AGH, 2025) Skrzypaszek, Krzysztof
This article examines the potential application of the Vom Berg rheological model in the technology of polymer-modified drilling muds. In recent years, intensive research has been conducted at the Faculty of Drilling, Oil, and Gas to optimize procedures for selecting rheological models for technological fluids used in drilling operations. One of the key outcomes of this research is the proprietary RheoSolution methodology, applied in this study to assess the adaptability of the Vom Berg rheological model. Originally developed for analyzing the rheology of cement slurries in civil engineering, this model has been utilized here to describe the relationship between shear stress and shear rate in polymer-modified drilling muds. As part of the research, laboratory experiments were conducted at the Drilling Fluids Laboratory of the Faculty of Drilling, Oil, and Gas, focusing on drilling muds modified with xanthan biopolymer. The obtained results served as the basis for a comparative analysis of the classical API methodology and the proposed RheoSolution approach in determining the rheological parameters of the tested fluids. Special attention was given to the applicability of the Vom Berg model as a tool for a more precise characterization of drilling mud behavior under dynamic conditions. This article is part of a broader series of publications aimed at demonstrating the utility and potential advantages of the RheoSolution methodology in studies on the rheological properties of technological drilling muds.
Access status: Open Access ,
Prevention of gas migration in the area of the Carpathian Foothills in the laboratory tests
(Wydawnictwa AGH, 2018) Uliasz, Małgorzata; Kremieniewski, Marcin
In the area of the Carpathian Foothills, gas exhalations are a frequently observed phenomenon. It is connected with the presence of many shallow gas horizons in the autochthonous Miocene. In addition, gas migration effect is intensified due to the complicated geological structure in this region. During drilling boreholes, one of the most important requirements is to ensure adequate tightness in the annular space. In connection with the above, laboratory tests were carried out in the Oil and Gas Institute - National Research Institute, whose aim was to assess the impact of applied drilling fluids on the degree of sealing the annular space on the contact hardened cement slurry - rock formation, for specific geological and technical conditions. The result of the conducted research work was a modification of the composition of washing fluids in terms of improving the efficiency of their impact on the wall of borehole and removal of mudcake formed by the drilling muds, as well as modification of cement slurry formulations by application appropriate additives to prevent gas migration. During research work have been indicated potential causes of gas migration from the annular space in the selected holes drilled in the Carpathian Foothills and preventive actions aimed at reduction gas migration and exhalation.
Access status: Open Access ,
Relationship between the rheological parameters and zeta potential of bentonites
(2016) Kowalczyk, Damian; Wach, Mateusz; Plewik, Albert; Wysocki, Sławomir
The paper presents an estimation of bentonites quality using electrokinetic phenomena occurring in dispersed clay systems. The idea behind the work is to demonstrate the relationship between the rheological parameters of the tested materials, and their zeta potential and consequently determine the suitability of these criteria for preparing drilling fluids.
Access status: Open Access ,
Removal of the filter cake created by the mud for hydrogeological drilling by the method of acidizing
(2015) Wysocki, Sławomir; Gaczoł, Magdalena; Ciepielowska, Martyna
The article describes issue of a mud for hydrogeological wells and a method of removing sediment accumulated on the well filter and in the near-well zone after borehole drilling. Developed fluid formula is based on both primary criterion of selecting the best technological parameters of the mud and restrictive ecological standards. Because of the contact between the mud and the underground water (which is the main source of potable water), a need to select appropriate components such as biodegradable polymers (Guar-Gum, XC) and other organic compounds that are not causing harmful environmental effects has arisen. Furthermore, developed formula allows for relatively easy removal of mud remains from the well filter and near-well zone, inereasing well efficiency. The paper includes research findings of sediment acidizing by the procedure called »soft acidizing«. Any information about practical application of this procedure can hardly be found in specialized literature. Therefore, concentrations and variations of the acetic, hydrochloric and citric acids were subject of research and analysis.
Access status: Open Access ,
Selected methods of measuring drilling mud settling
(2014) Zwierzyński, Adam Jan; Wróblewski, Tomasz; Wiśniowski, Rafał; Stryczek, Stanisław
Methods of measuring settling ratę of drilling muds have been selected and the basic theoretical data on this process are addressed in the paper. A brief discussion is also given on the negative influence of settling in drilling mud on the stability of wellbore and formation of potential drilling complications. The results of an analyses of the settling processes taking place in oil-based muds madę according to 8 recipes are presented. The direct weighing method has been used in the measurements.
Access status: Open Access ,
Studies on the impact of ionic degree of copolymer poly(AAm-co-AMPSA) to bentonite suspension parameters
(2016) Wysocki, Sławomir; Klima, Kinga; Podborska, Agnieszka
The article presents results of the laboratory studies on the impact of ionic degree of copolymer poly (AAm- -co-AMPSA) to technological parameters of bentonite suspension. Rheological properties of bentonite suspension, lubricity, filtration and LST were examined.
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, Wiktor
Various 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.
Access status: Open Access ,
Use of PHPA polymer for modification of rheological and filtration properties of water based drilling fluids used for conventional and casing drilling
(2012) Kelessidis, Vassilios C.; Chatzistamou, Vasiliki C.; Repouskou, Eftychia; Zografou, M.; Karimi, Moji
Wodne płuczki wiertnicze zależą głównie od bentonitu zapewniającego odpowiednie właściwości reologiczne i filtracyjne. Jednakże w wielu przypadkach wykorzystuje się inne dodatki jak np. polimery naturalne bądź syntetyczne mające na celu stabilizację łupków, otworu, kontrolę procesu flokulacji lub deflokulacji dyspersji bentonitowych przy jednoczesnym ograniczeniu nadmiernego tarcia i podwyższonego momentu. Ponadto są one ekologiczne. Wśród tego typu polimerów znajdują się karboksymetyloceluloza, skrobia, guma guar, polianionowa celuloza, częściowo hydrolizowany poliakryloamid, które można zastosować oddzielnie lub w połączeniu bądź jako dodatki do dyspersji bentonitowych. Istnieje kilka prac zawierających wyniki badań nad wpływem karboksymetylocelulozy, polianionowej celulozy i innych polimerów na właściwości reologiczne wodnych dyspersji bentonitowych, jednak bardzo niewiele można znaleźć na temat wpływu polimeru z częściowo hydrolizowanego poliakryloamidu. Uważa się, że polimer ten po dodaniu do wodnej płuczki bentonitowej wchodzi w reakcję z cząsteczkami bentonitu ułatwiając łączenie się cząstek bentonitu, dzięki czemu poprawiają się reologiczne właściwości zawiesiny. Ponadto, ze względu na wyjątkową morfologię polimeru zbudowanego z hydrolizowanego poliakryloamidu i powłoki ochronnej jaką daje on cząstkom bentonitu, zasadniczo ograniczone zostają straty płuczki. W pracy przedstawiono wyniki badań nad poprawą właściwości reologicznych i filtracyjnych rozcieńczonych dyspersji wodno-bentonitowych po dodaniu różnych stężeń hydrolizowanego poliakryloamidu, oceniono otrzymane wyniki, porównano je z podobnymi rezultatami uzyskanymi po zastosowaniu jednego z popularnych polimerów, karboksymetylocelulozy i zaproponowano optymalne stężenia hydrolizowanego poliakryloamidu w celu uzyskania lepszej wydajności płuczek wiertniczych.