Modeling Analysis of Thermally Insulated Fluid to Mitigate Trapped Annular Pressure in Deepwater Wells
Rattachement africain : cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Trapped annular pressure is among the primary well integrity risks for deepwater wells, particularly under high-temperature and high-production-rate conditions. The application of thermally insulated fluid to mitigate trapped annular pressure offers the advantages of low cost and convenient operation, yet its applicability still requires systematic evaluation. To investigate the mitigation effect, this paper establishes a model by coupling radial heat transfer between the wellbore and surrounding formations based on annular volume compatibility. The model is mainly composed of two modules: temperature calculation and pressure calculation. A segmented iterative algorithm is adopted to solve the model, which enables quantitative analysis of the variation law under different conditions. Via the proposed model, this paper analyzes the influences of thermal conductivity, production rate, production time and geothermal gradient on trapped annular pressure. The results indicate that thermally insulated fluid can effectively reduce trapped annular pressure, and the mitigation effect becomes more significant as thermal conductivity decreases. Among different injection schemes, the optimal control performance is achieved when thermally insulated fluid is injected into the A annulus. Compared with conventional annular fluids, the B-annular pressure decreases from 50.71 MPa to 21.52 MPa when the thermal conductivity of thermally insulated fluid is reduced to 0.1 W/(m·°C). Thermally insulated fluid still maintains effectiveness under high-temperature and high-production-rate conditions, and its thermal conductivity should preferably be controlled below 0.15 W/(m·°C). Combined thermal insulation measures are recommended for long-term production under high production rate and high temperature. The maximum allowable annular pressure should be determined based on the strength of the C annulus, so as to provide a design criterion for the thermal insulation design.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Modeling Analysis of Thermally Insulated Fluid to Mitigate Trapped Annular Pressure in Deepwater Wells
- Date Crossref
- 26/08/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Beijing University of Chemical Technology Interdisciplinary Center for Green and Intelligent Pipeline Transportation (Pipeline-X) pays non établi dans la noticeUniversité ou école supérieure
-
Research Institute of Petroleum Exploration and Development pays non établi dans la noticeStructure de recherche
-
China National Petroleum Corporation (China) pays non établi dans la noticeEntreprise
-
School of Mechanical and Electrical Engineering pays non établi dans la noticeUniversité ou école supérieure
-
Research Institute of Petroleum Exploration & Development pays non établi dans la noticeStructure de recherche
-
CNPC Research Institute of Safety and Environment Technology pays non établi dans la noticeStructure de recherche
-
Ltd. CNPC Engineering Technology R & D Co. pays non établi dans la noticeEntreprise
Interdisciplinary Center for Green and Intelligent Pipeline Transportation (Pipeline-X) — Beijing University of Chemical Technology, Research Institute of Petroleum Exploration and Development et China National Petroleum Corporation (China), avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.