Comparison of wax deposition in vertical and horizontal oil production wells

Date

2000-01-01

Author

Özbayoglu, Evren
Demiral, M. R. Birol
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

184
views

0
downloads

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 phenomena in vertical and horizontal well bores. Solid-liquid equilibrium constants for each pseudo-component were calculated. Critical pressures and overall solid mole fractions of the crude oil at different error ranges were determined. It was observed that wax is precipitated mostly in vertical sections, and the pressure change had a minor effect on wax appearance in horizontal sections.

Subject Keywords

Paraffin deposition, Precipitation, Thermodynamics, Mixtures

URI

https://hdl.handle.net/11511/53837

Journal

In Situ

Collections

Department of Petroleum and Natural Gas Engineering, Article

Suggestions

OpenMETU
Core

Size-by size analysis of breakage parameters of cement clinker feed and product samples of an industrial roller press Camalan, Mahmut; Hoşten, Çetin; Department of Mining Engineering (2012) The main objective in this study is to compare breakage parameters of narrow size fractions of cement clinker taken from the product end and feed end of industrial-scale high pressure grinding rolls (HPGR) in order to assess whether the breakage parameters of clinker broken in HPGR are improved or not. For this purpose, drop weight tests were applied to six narrow size fractions above 3.35 mm, and batch grinding tests were applied to three narrow size fractions below 3.35 mm. It was found that the breakage ...
Wax deposition in horizontal wells Ozbayoglu, M.E.; Demiral, B.; Kök, Mustafa Verşan (2000-01-01) 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 fac...
Laminar filmwise condensation of flowing vapor on a sphere Erol, Doğuş; Yamalı, Cemil; Department of Mechanical Engineering (2004) The objective of this study is to analyze theoretically the laminar film condensation of water vapor flowing on a sphere. For this purpose, the problem was handled by including all of the two-phase boundary layer parameters such as gravity, effect of vapor shear, inertia, energy convection and pressure gradient. For this full two-phase boundary layer system, the boundary layer equations, boundary conditions and the interfacial conditions were first analyzed, and then discretized. A computer program in Mathc...
Incompressible flow simulations using least squares spectral element method on adaptively refined triangular grids Akdağ, Osman; Sert, Cüneyt; Department of Mechanical Engineering (2012) The main purpose of this study is to develop a flow solver that employs triangular grids to solve two-dimensional, viscous, laminar, steady, incompressible flows. The flow solver is based on Least Squares Spectral Element Method (LSSEM). It has p-type adaptive mesh refinement/coarsening capability and supports p-type nonconforming element interfaces. To validate the developed flow solver several benchmark problems are studied and successful results are obtained. The performances of two different triangular ...
Comparison of magnetic Barkhausen noise and ultrasonic velocity measurements for microstructure evaluation of SAE 1040 and SAE 4140 steels Gür, Cemil Hakan; Çam, İbrahim (Elsevier BV, 2007-05-01) The aim of this study is to compare the performance of magnetic Barkhausen noise and ultrasonic methods for the evaluation of the microstructure of commercial steels. Following the austenitization of the specimens made of SAE 1040 and SAE 4140, various heat treatments were carried out to obtain microstructures consisting of martensite, tempered martensite, fine pearlite-ferrite, and coarse pearlite-ferrite. The microstructures were initially characterized by SEM investigation and hardness measurements. The ...

Citation Formats

E. Özbayoglu, M. R. B. Demiral, and M. V. Kök, “Comparison of wax deposition in vertical and horizontal oil production wells,” In Situ, pp. 1–19, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53837.