Research on heat transfer law of multiphase flow in wellbore under coexistence of overflow and lost circulation in deepwater drilling

• DOI: 10.1016/j.csite.2024.104103
• Publication Date: 2024-02-06T18:27:18Z
• Authors: Xin Yu; Yonghai Gao; Xinxin Zhao; Hongxing Yuan; Luxiang Liu; Baojiang Sun
• Keywords: Wellhead; Lost Circulation; Circulation (fluid dynamics)

A reliable and accurate wellbore heat transfer model is essential for making critical decisions during deepwater drilling operations. This study develops a transient coupled flow the coexistence of overflow lost circulation simulation in drilling. Through established theoretical model, this paper studies influence gas influx, circulation, influx on temperature distribution migration analyzes development under different engineering parameters. The results show that expansion after mainly occurs at depth 200 m above. void fraction reduced with increase wellhead casing pressure, but change range gradually reduced. After occurs, temperature, bottom hole pressure decrease obviously. greater than two alone. upper lower generally higher influx. However, slightly smaller