Research on the heat transfer law of gas-liquid two-phase flow in a deepwater wellbore

摘要

According to the features of low temperature and Type III boundary conditions during deepwater oil and gas exploitation, an experimental system was designed and built to simulate the heat transfer of deepwater oil and gas. A large number of laboratory experiments were carried out and the relational expressions of the heat transfer as well as the influence of the gas-liquid discharge on the heat transfer of each gas-liquid two-phase flow patterns under the deepwater and low-temperature Type III boundary conditions were obtained. The results show that the expression in the laminar flow obtained in this paper is largely different from the relational expression of the heat transfer at ordinary temperatures under the simple boundary conditions. The two expressions are in substantial agreement in the turbulent flow. The liquid discharge is the principal factor which influences the heat transfer in the bubbly flow, slug flow and annular flow while the gas-liquid two-phase flow has little influence on the heat transfer in the churn flow.