AGH Drilling, Oil, Gas
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ISSN 2299-4157
e-ISSN: 2300-7052
Issue Date
2015
Volume
Vol. 32
Number
No. 4
Description
Journal Volume
AGH Drilling, Oil, Gas
Vol. 32 (2015)
Projects
Pages
Articles
Characterization of Swelling Packer EPDM Elastomers
(2015) Moslavac, Bojan; Matanović, Davorin; Pašić, Borivoje
Since many years diff erent elastomer types have been applied in a number of oilfi eld completion solutions. With regard to harsh environment elastomers have to withstand someti mes, it is crucial to design long lasting products resilient to high temperature and aggressive fl uids able to deal with high diff erential pressures at the same time. Swelling packers appear to be a real challenge to design. A fre quent question may be what type of rubber to use in swelling systems to compensate high temperature and high pressu re conditions. This paper is based on methodology and characterization of vulcanized ethylene-propylene-diene mon omer (EPDM) samples submitted to swelling in a glass dish and OFITE dynamic linear swell meter. Several diff erent recipes for rubber vulcanization were used and tested trying to combine and mix diff erent concentrations of each component. The swelling of rubber samples was tested in oil acquired from one of the Croatian oil fi elds at room temperature and 90°C. A signifi cant diff erence in swelling intensity and speed was observed when comparing these two conditions. Swelling properties were carefully scaled imposing conclusions given at the end of the paper.
The role of capillary trapping during geologic CO₂ sequestration
(2015) Knapik, Ewa; Janiga, Damian; Wojnarowski, Paweł; Stopa, Jerzy
Capillary trapping is thought to be one of the primary $CO_{2}$ fixing mechanisms in a porous medium when it is stored. While $CO_{2}$ is injected, gas displaces formation water (brine) in the process called drainage. In the case of the rock mass wetted by water, formation water remains adsorbed in wall pores and micropores. Once the injection process has been completed, gas is displaced by the natural water in the process referred to as imbibition. In that way $CO_{2}$, being a non-wetting phase, is held in the form of dispersed bubbles as an immobile phase. The process occurs fast and allows for a regular storage of large amounts of $CO_{2}$. The process is dependent upon numerous parameters, including capillary pressure and contact angle, but such measurements cannot be easily taken for rock cores in reservoir conditions. Another problem is the fact that it is difficult to separate the impact of such mechanisms as dis-solution and mineral trapping. So far capillary trapping has been deeply analyzed in terms of hydrocarbon recovery and contaminant remediation. The goal of this article is to:– present a physiochemical basis of capillary trapping in CCS context,– simulate the impact of relative permeability hysteresis on geological $CO_{2}$ storage.
An evaluation of hydrocarbon deposit tightness in aspect of CO₂ sequestration
(2015) Blicharski, Jacek
Depleted hydrocarbon deposits due to large capacity and proven tightness are often considered as prime candidates for $CO_2$ sequestration in geological structures. The tightness of these structures is mainly connected with the exis-tence of water saturated overbunden rocks of very low permeability which form a natural barrier for the migration of hydrocarbons. This paper explains the sealing mechanisms of caprocks resulting from capillary forces at the interface of hydrocarbon – water and carbon dioxide – water contact. Other ways of caprock leakage due to rock fracturing or reactivation of natural faults and fi ssures were also investigated.
CO₂ storing capacity in geologic formations in the Czech Republic
(2015) Bujok, Petr; Klempa, Martin; Labus, Krzysztof; Porzer, Michał; Pánek, Petr; Rado, Robert; González-Rodríguez, Marina A.
The $CO_{2}$ emission is a significant environmental problem threatening the sustained development of mankind. One of the possible ways of limiting the emission is the disposal of carbon dioxide in geologic formations.A pilot project of $CO_{2}$ storage in geologic formations in the Czech Republic (REPP-$CO_{2}$) is presented in this paper. The project is part of the Norwegian Fund and the research consortium (headed by the Czech Republic Geologic Office), with VSB-TU Ostrava as a participant. The VSB-TU Ostravais represented by the Faculty of Geology and Mining (HGF) and the Faculty of Metallurgy and Materials Science (FMMI) in the consortium.The research activity of the consortium mainly focuses on the development and improvement of selected laboratory methods, modelling and simulation, which are basic for the evaluation of safety of $CO_{2}$ storing in geologic forma-tions. Thise paper presents the research conducted by the Faculty of Geology and Mining (HGF) VSB-TU Ostrava within the project.
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, Magdalena
This 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.