Shandong Science ›› 2022, Vol. 35 ›› Issue (4): 77-83.doi: 10.3976/j.issn.1002-4026.2022.04.010

• Energy and Power • Previous Articles     Next Articles

Increasing the velocity of annular gas in deepwater drilling

WANG Xiao-hui(), JIANG Hai-jun   

  1. Strategic Planning Institute,SINOPEC Research Institute of Petroleum Science, Beijing 100101, China
  • Received:2021-09-08 Published:2022-08-20 Online:2022-07-25

Abstract:

In the process of deepwater drilling, early and accurate monitoring of gas invasion is crucial for drilling safety. Based on Hagdorn and Brown’s method, this study establishes a model for increasing gas velocity after gas invasion in deepwater drilling, optimizes the influence of well deviation angle on the division principle of gas-flow pattern and gas slippage velocity in deviated wells, and realizes the real-time calculation of the time when the gas reaches subsea wellhead in accordance with the gas-liquid flow law in the wellbore after gas invasion. The results can effectively reflect the flow law of wellbore annulus after the gas invasion in deepwater-deviated well drilling and are of great significance for gas-invasion monitoring and well control.

Key words: deepwater, wellbore annulus, gas invasion, increasing velocity, numerical model

CLC Number: 

  • TE52

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits third parties to freely share (i.e., copy and redistribute the material in any medium or format) and adapt (i.e., remix, transform, or build upon the material) the articles published in this journal, provided that appropriate credit is given, a link to the license is provided, and any changes made are indicated. The material may not be used for commercial purposes. For details of the CC BY-NC 4.0 license, please visit: https://creativecommons.org/licenses/by-nc/4.0