- Tytuł:
- Research into the development of a hybrid spacer
- Autorzy:
-
Kremieniewski, Marcin
Kędzierski, Miłosz - Powiązania:
- https://bibliotekanauki.pl/articles/1834097.pdf
- Data publikacji:
- 2020
- Wydawca:
- Instytut Nafty i Gazu - Państwowy Instytut Badawczy
- Tematy:
-
hybrydowa ciecz buforowa
bufor
ciecz wyprzedzająca
oczyszczenie przestrzeni pierścieniowej
poprawa skuteczności
zacementowania
ciecz dwufunkcyjna
hybrid spacer
spacer
preflushes
cleaning of the annular space
improvement of cementing efficiency
bifunctional liquid - Opis:
- While the cement slurry is being pumped, the drilling mud is removed in the annular space filled with it. The cement slurry pressed after the mud removes residues of mud sludge. In order to properly seal the borehole with cement slurry, which will prevent gas flow after binding, it is necessary to thoroughly clean the annular space from the mud sludge by pumping the sequence of preflush. First, the washing liquid is pumped, then the spacer, followed by the cement slurry. Obtaining a properly cleaned annular space before cementing undoubtedly improves sealing and allows to eliminate or reduce the possibility of the undesirable phenomenon of gas micro flows in the annular space. However, pressing the washing liquid to disperse the residue of the sludge and then pressing the spacer after it, which equalizes the rheological parameters between the pressed drilling fluids (low-viscous washing - cement slurry with much higher plastic viscosity) causes an increase in the costs of cementing. Therefore, it was decided to carry out research on the development of a hybrid spacer. The idea of research was that the spacer had a dual-purpose nature. On the one hand, the hybrid liquid was to act as a spacer (properly selected density, viscosity and structural strength), and on the other hand, the surfactants contained in the spacer were to clean the annular space prepared for cementation. The use of such a liquid reduces costs and shortens the preparation time for cementing. This article presents the results of research on the development of a hybrid spacer. Annular space purification studies were performed under simulated borehole conditions. The obtained research results allowed to state that the developed hybrid spacer has bifunctional properties and an improvement in the cleaning of the rock formation surface is visible compared to the washing liquids used so far. Unfortunately, a problem was also found regarding significant gelation of the mud during contact with the cement present in the spacer. It should be noted that these were pilot studies in which only a partial solution to the problem was achieved. The developed hybrid spacer requires further research to eliminate gelation of the mud during contact with the hybrid spacer. The discussed issue allows researchers themselves to familiarize themselves with the discussed subject, thanks to which in the future it will be possible to further develop given issues.
- Źródło:
-
Nafta-Gaz; 2020, 76, 8; 517-526
0867-8871 - Pojawia się w:
- Nafta-Gaz
- Dostawca treści:
- Biblioteka Nauki
Artykuł