Simulation of temperature-pressure profiles and wax deposition in gas-lift wells
| Autor: | Snezana Sevic, Branko Grubac |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Production tubing Artificial lift General Chemical Engineering Hydrostatic pressure Gas lift 02 engineering and technology wax deposition 010502 geochemistry & geophysics 01 natural sciences pressure-temperature profile law.invention 020401 chemical engineering law lcsh:Chemical engineering 0204 chemical engineering lcsh:HD9650-9663 0105 earth and related environmental sciences Wax oil well Petroleum engineering Annulus (oil well) lcsh:TP155-156 simulation Oil well visual_art visual_art.visual_art_medium gas-lift Casing lcsh:Chemical industries |
| Zdroj: | Chemical Industry and Chemical Engineering Quarterly, Vol 23, Iss 4, Pp 537-545 (2017) |
| ISSN: | 2217-7434 1451-9372 |
| DOI: | 10.2298/ciceq161014006s |
| Popis: | Gas-lift is an artificial lift method in which gas is injected down the tubing- -casing annulus and enters the production tubing through the gas-lift valves to reduce the hydrostatic pressure of the formation fluid column. The gas changes pressure, temperature and fluid composition profiles throughout the production tubing string. Temperature and pressure drop along with the fluid composition changes throughout the tubing string can lead to wax, asphaltenes and inorganic salts deposition, increased emulsion stability and hydrate formation. This paper presents a new model that can sucesfully simulate temperature and pressure profiles and fluid composition changes in oil well that operates by means of gas-lift. This new model includes a pipe-in-pipe segment (production tubing inside production casing), countercurrent flow of gas-lift gas and producing fluid, heat exchange between gas-lift gas and the surrounding ambient ? ground; and gas-lift gas with the fluid in the tubing. The model enables a better understanding of the multiphase fluid flow up the production tubing. Model was used to get insight into severity and locations of wax deposition. The obtained information on wax deposition can be used to plan the frequency and depth of wax removing operations. Model was developed using Aspen HYSYS software. |
| Databáze: | OpenAIRE |
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