Jiajia Jing , Jilong Zou , Wei Luo , Yonggang Deng , Wenbin Chen , Feilong Liao
{"title":"Study on emergency plugging mechanism after BOP seal failure under UHP blowout conditions in natural gas wells","authors":"Jiajia Jing , Jilong Zou , Wei Luo , Yonggang Deng , Wenbin Chen , Feilong Liao","doi":"10.1016/j.cherd.2025.09.003","DOIUrl":null,"url":null,"abstract":"<div><div>Once a natural gas well blowout occurs, the liquid fluid in the well will be drained in a short time, and the wellhead will rapidly transform into an ultra-high pressure and large displacement blowout environment dominated by natural gas. However, the suspension capacity and motion state of particles in the blowout fluids of natural gas wells and oil wells vary greatly. Therefore, it is of great significance to study whether the particle bridging method can be used for emergency plugging in the case of blowout preventer (BOP) sealing failure in ultra-high pressure (70 MPa) natural gas well blowout conditions. Based on an analysis of the common failure modes of BOPs, this paper establishes a plugging model for BOP. The reliability of the model is verified through a large-scale BOP plugging experimental system, and the mechanism of emergency plugging under gas well blowout conditions is studied using this model. The results show that the plugging efficiency is lower than that of oil wells but remains effective. The \"1/3 bridging rule\" is not applicable to particle bridging plugging under ultra-high pressure and large displacement conditions. Plugging efficiency is negatively correlated with particle size and positively correlated with particle concentration. There is no significant effect of pumping displacement or particle injection volume on plugging efficiency.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"222 ","pages":"Pages 165-176"},"PeriodicalIF":3.9000,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Research & Design","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263876225004666","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Once a natural gas well blowout occurs, the liquid fluid in the well will be drained in a short time, and the wellhead will rapidly transform into an ultra-high pressure and large displacement blowout environment dominated by natural gas. However, the suspension capacity and motion state of particles in the blowout fluids of natural gas wells and oil wells vary greatly. Therefore, it is of great significance to study whether the particle bridging method can be used for emergency plugging in the case of blowout preventer (BOP) sealing failure in ultra-high pressure (70 MPa) natural gas well blowout conditions. Based on an analysis of the common failure modes of BOPs, this paper establishes a plugging model for BOP. The reliability of the model is verified through a large-scale BOP plugging experimental system, and the mechanism of emergency plugging under gas well blowout conditions is studied using this model. The results show that the plugging efficiency is lower than that of oil wells but remains effective. The "1/3 bridging rule" is not applicable to particle bridging plugging under ultra-high pressure and large displacement conditions. Plugging efficiency is negatively correlated with particle size and positively correlated with particle concentration. There is no significant effect of pumping displacement or particle injection volume on plugging efficiency.
期刊介绍:
ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering.
Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.