TY - THES

T1 - Analysis of Unstable Flow in Oil-and-Gas Flowline under Carbon Dioxide Corrosion Conditions

AU - Dubovik, Kirill

N1 - no embargo

PY - 2022

Y1 - 2022

N2 - The main purpose of the study is the mathematical and hydrodynamic analysis of unstable flow in oil-and-gas flowlines under conditions of carbon dioxide corrosion. First of all, the analysis of existing mathematical models describing multiphase flows was conducted. Then, Multiflash was used to create a fluid model, OLGA was implemented for hydrodynamic analysis of the flow, PIPESIM provided an ability of corrosion rate calculation. However, laboratory studies of corrosion inhibitors were done and made it possible to compare experimentally calculated corrosion rates with field test data. It was approved that significant content of carbon dioxide in fluid composition and high water cut magnitudes are the main factors causing corrosion in the considered isolated system. Moreover, the effectiveness of each inhibitor was determined experimentally. In addition, possible ways to solve the pipeline corrosion problem were suggested.

AB - The main purpose of the study is the mathematical and hydrodynamic analysis of unstable flow in oil-and-gas flowlines under conditions of carbon dioxide corrosion. First of all, the analysis of existing mathematical models describing multiphase flows was conducted. Then, Multiflash was used to create a fluid model, OLGA was implemented for hydrodynamic analysis of the flow, PIPESIM provided an ability of corrosion rate calculation. However, laboratory studies of corrosion inhibitors were done and made it possible to compare experimentally calculated corrosion rates with field test data. It was approved that significant content of carbon dioxide in fluid composition and high water cut magnitudes are the main factors causing corrosion in the considered isolated system. Moreover, the effectiveness of each inhibitor was determined experimentally. In addition, possible ways to solve the pipeline corrosion problem were suggested.

KW - Oil-and-gas flowline

KW - Unstable flow

KW - Multiphase flow

KW - CO2 Corrosion

KW - Carbon dioxide

KW - Multiflash

KW - OLGA

KW - PIPESIM

KW - Fluid model

KW - Laboratory study

KW - Experiment.

KW - Öl-und-Gaspipeline

KW - instabile Strömung

KW - Mehrphasenströmung

KW - CO2-Korrosion

KW - Kohlendioxid

KW - Multiflash

KW - OLGA

KW - PIPESIM

KW - Fluidmodell

KW - Laborstudie

KW - Experiment.

U2 - 10.34901/mul.pub.2023.89

DO - 10.34901/mul.pub.2023.89

M3 - Master's Thesis

ER -