西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (2): 81-92.DOI: 10.11885/j.issn.1674-5086.2015.05.16.03

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A Review on Wellbore Stability with Multi-Field Coupling Analysis

HE Shiming1,2, CHEN Yulin2, MA Dexin3, ZHOU Jun2, WANG Wei2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. School of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. China Oilfield Services Limited, Sanhe, Hebei 101149, China
  • Received:2015-05-16 Online:2017-04-01 Published:2017-04-01
  • Contact: 何世明,E-mail:hesming@sina.com

Abstract: Wellbore stability is greatly affected by various factors, such as the formation fluid, and the properties and temperature of the drilling fluid, and is critical to petroleum drilling. By summarizing the actuality of wellbore instability analytical studies both locally and globally, the influencing factors of wellbore instability during drilling were divided into five fields:rock structure, stress, seepage, temperature, and chemical. Their detailed contents and causes were analyzed, based on which the impact of multi-coupling on wellbore instability was systematically analyzed. The stress and rock structure fields were the basis for the research on multi-coupling analysis of wellbore instability. The rock structure types and rock deformation mechanism were classified by summarizing the research methods of wellbore instability both locally and globally. The three-field, fourfield, and five-field coupling wellbore stability studies was based on the rock structure and stress fields combined with three other fields; pore medium-thermoelastic theory and pore medium-chemical-thermoelastic theory have been widely used in fourfield and five-field coupling analysis. To conclude, the development tendency of multi-coupling analysis was explored with the features of different fields and the development of drilling technology considered.

Key words: wellbore stability, fields, multi-field coupling, rock mechanics

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