Wax deposition in horizontal wells

Date

2000-01-01

Author

Ozbayoglu, M.E.
Demiral, B.
Kök, Mustafa Verşan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

287
views

0
downloads

In this research, wax deposition in horizontal well bores was studied. In a horizontal well, the main mechanism for wax appearance is the pressure change rather than the temperature change. Six different thermodynamic models were improved for horizontal wells by adding a pressure function, and a computer program was developed to simulate the precipitation phenomena in horizontal wells. Solid-liquid equilibrium constants for each pseudo-component were calculated. Critical pressures and overall solid mole factions of the crude oil at different error ranges are determined. In addition to these, the changes in productivity index due to wax deposition for steady stare and pseudo-steady state conditions were examined by the addition of a "wax factor". It was observed that pressure change was slightly effective on wax appearance in horizontal wells.

Subject Keywords

Wax deposition, Horizontal well, and crude oil, Wax appearance temperature

URI

https://hdl.handle.net/11511/33236

Journal

Petroleum Science and Technology

DOI

https://doi.org/10.1080/10916460008949839

Collections

Department of Petroleum and Natural Gas Engineering, Article

Suggestions

OpenMETU
Core

Wax appearance temperature (WAT) determinations of different origin crude oils by differential scanning calorimetry Kök, Mustafa Verşan; Nurgaliev, Danis K. (2018-09-01) In this research, wax appearance temperatures (WAT) of eight different crude oils from south-eastern region of Turkey were determined by differential scanning calorimetry. The experiments were performed at a heating/ cooling-rate of 2 degrees C/min from 60 to -20 degrees C It was observed that the wax appearance temperature of different origin crude oils was varied between 14.2 and 37.8 degrees C depending on the API gravity and wax content. It was also observed that the crude oils have enthalpy of precipit...
Comparison of Wax Appearance Temperatures of Crude Oils by Differential Scanning Calorimetry, Thermomicroscopy and Viscometry Kök, Mustafa Verşan (1996-07-01) This paper presents the results of an experimental study of the determination of wax appearance temperatures (WAT) of 15 crude oils by differential scanning calorimetry (d.s.c.), thermomicroscopy and viscometry. Good agreement is obtained among the three techniques for crude oils having a significant precipitation rate. Considering the great diversity of crude oils, it is concluded that d.s.c. and thermomicroscopy should be used together for a better understanding of the determination of WAT of crude oils.
Acid curing and baking of bastnaesite ore and concentrate Topkaya, Yavuz Ali (1999-01-01) In this study, the hydrometallurgical evaluation of a rare earth ore as well as a concentrate obtained from this ore was done in the laboratory. For the mentioned study, a bastnaesite type rare earth ore located in Beylikahir in Turkey was used. The total rare earth oxide (REO) content of the deposit was estimated to be 1 million tons with an average concentration of 3.42% REO. The rare earths were contained in bastnaesite mineral. The other constituents of the ore were calcium fluoride (52.5%), barite (25....
Comparison of wax deposition in vertical and horizontal oil production wells Özbayoglu, Evren; Demiral, M. R. Birol; Kök, Mustafa Verşan (2000-01-01) In this study, wax deposition in horizontal well bores and vertical well bores is compared. In a vertical well, the temperature change is the dominant mechanism for wax deposition; however, in a horizontal well, the main mechanism for wax appearance is the pressure change. Six different thermodynamic models, developed originally for vertical wells by other researchers, were improved for horizontal wells by modifying with a pressure function, and a computer program was developed to simulate the precipitation...
Comparative methods in the determination of wax content and pour points of crude oils Kök, Mustafa Verşan; Claudy, P. (2007-12-01) In this research, differential scanning calorimetry (DSC) and gas chromatography is used to determine the wax content of fourteen crude oils of different sources. Different empirical equations were applied to compare the wax content of crude oils. For the fourteen crude oil samples with the wax content ranging from 7.5 to 43.8 mass%, it was observed that the results of empirical equations were in good agreement with those determined by DSC and GC. Accordingly, a correlation between ASTM pour point and the t...

Citation Formats

M. E. Ozbayoglu, B. Demiral, and M. V. Kök, “Wax deposition in horizontal wells,” Petroleum Science and Technology, pp. 177–193, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33236.