- Tytuł:
-
Dobór materiałów wiążących w celu poprawy wytrzymałości kamieni cementowych z zaczynów emulsyjnych
Selection of binding materials to improve the mechanical strength of cement stones from emulsion slurry - Autorzy:
- Kut, Łukasz
- Powiązania:
- https://bibliotekanauki.pl/articles/1834229.pdf
- Data publikacji:
- 2020
- Wydawca:
- Instytut Nafty i Gazu - Państwowy Instytut Badawczy
- Tematy:
-
zaczyn cementowy
zaczyn emulsyjny
emulsja typu „W/O”
płuczka inwersyjna
cement glinowo-wapniowy
kamień cementowy
parametry mechaniczne
parametry technologiczne
cement slurry
emulsion slurry
W/O emulsion
invert emulsion drilling mud
calcium-aluminum cement
cement stone
mechanical parameters
technological parameters - Opis:
- Sealing technology during the sealing of the annular space between the casing column and the borehole wall mainly used cement slurries or latex cement slurries based on freshwater or brackish water. Such cement slurries work well during cementation operations in holes drilled with water-based drilling mud. In the oil industry, more and more often boreholes are drilled using inversion mud (oil-based mud), e.g. Kutno, Tyczyn, Kramarzówka. These muds can be used to drill holes in almost any geological conditions. The use of this type of mud has many advantages and benefits, however, there are also negative aspects. One of the disadvantages is the difficulty of removing mud cake on the walls of the borehole, which may affect the ineffective sealing of the casing column. The presence of this type of drilling mud and its filter cakes in the hole, when sealing the column of casing pipes, requires the use of specially developed cement slurries with the addition of oil. First attempts to prepare cement slurries based on liquid water-in-oil showed that this is not easy to achieve but not impossible. Cement slurries with good technological parameters were obtained, however, the mechanical parameters of cement stones were low. The aim of the presented research was to develop cement slurries based on various binders, used to seal the casing columns after the use of an invert emulsion drilling mud, from which we will obtain stones with increased strength parameters. The presence of oil in the composition of the cement slurry may affect its greater compatibility with mud cake on the walls of the borehole and more effective sealing of the annular space. The freshwater played the role of the slurry. The dispersant, surfactant, cement, a mixture of types of cement or cement with another binder were then added. The oil mixed with the emulsifier was added after homogenizing the mixture. Once all the components were combined, the cement slurry was mixed for 30 minutes and their technological parameters such as density, rheological parameters, filtration, setting time and electrical stability were examined. Cement stone test samples were prepared from selected cement slurries. These samples were cured and hydrated at two different temperatures: 25°C and 120°C. The compressive strength and adhesion to steel pipes tests, porosity and gas permeability were performed for the obtained cement stones. The tests showed that the use of calcium-aluminum types of cement or their mixtures with other binders had a positive effect on the technological parameters of the slurries and cement stones. The use of this type of cement and binders resulted in a decrease of filtration and an increase in the electrical emulsion stability of cement slurries compared to the Portland types of cement. The homogeneity of the mixture and the combination of additives did not pose major difficulties. The obtained cement stones had good mechanical parameters (Maghrabi et al., 2011; Dębińska, 2012; Kremieniewski, 2012, 2013; Vipulanandan and Krishnamoorti, 2013).
- Źródło:
-
Nafta-Gaz; 2020, 76, 3; 154-161
0867-8871 - Pojawia się w:
- Nafta-Gaz
- Dostawca treści:
- Biblioteka Nauki
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