dc.contributor.author | Johnsen, Maria Sletteng | |
dc.date.accessioned | 2014-09-22T12:20:28Z | |
dc.date.available | 2014-09-22T12:20:28Z | |
dc.date.issued | 2014-06-16 | |
dc.identifier.uri | http://hdl.handle.net/11250/220894 | |
dc.description | Master's thesis in Petroleum engineering | nb_NO |
dc.description.abstract | The purpose of the thesis was to look at particles in different rheology to develop a
methodology for measuring settling velocities in static systems. There was built a
small-scale cell with an inner pipe and a discharge system. In advance there was done
a feasibility test on which particles to use. As a result of this test, it was decided
to use glass beads with the diameter of 0.001 m, 0.002 m and 0.003 m, and steel
spheres with the diameter of 0.004 m and 0.015 m.
The fluids used were water and PAC in order to compare behavior in Newtonian versus
non-Newtonian. Two different concentrations of PAC were used. Rheology and
density measurements were done prior to the experiment. PAC-4g/l was heavier and
more viscous than water, and PAC-8g/l was heavier and more viscous than PAC-4g/l.
The terminal velocity of the particles was determined by theoretical formulas found
from literature and by looking at pictures from the camera recordings. Both regular
and high-speed camera was used. The results from the experiment in water show that the experimental velocity is coherent with the theoretical velocity.
There was done a second feasibility test on the fluids with different rheology. The
velocities and movements of particles of each size were studied, both in single and
cluster movements. Here it was ascertained that the velocity decreases with increasing
viscosity of the fluid. It was also observed that particles moving together in clusters
have a higher velocity than a single particle. As a result of this test, it was decided
to look at a two-phase system, where Bayol 35 was used as an oil solution and
PAC-4g/l was used as a water solution. The results from this experiment showed
similar velocities as previously found for water and PAC. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | University of Stavanger, Norway | nb_NO |
dc.relation.ispartofseries | Masteroppgave/UIS-TN-IPT/2014; | |
dc.subject | petroleumsteknologi | nb_NO |
dc.subject | hole cleaning | nb_NO |
dc.subject | PIV | nb_NO |
dc.subject | particle transport | nb_NO |
dc.subject | falling spheres | nb_NO |
dc.subject | terminal velocity | nb_NO |
dc.subject | boreteknologi | nb_NO |
dc.title | Particle transport and hole cleaning in wells during drilling | nb_NO |
dc.type | Master thesis | nb_NO |
dc.subject.nsi | VDP::Technology: 500::Rock and petroleum disciplines: 510::Petroleum engineering: 512 | nb_NO |