A Numerical Study on the Application of Stress Cage Technology

Pouya Abdollahpour, Seyyed Shahab Tabatabaee Moradi, Ekaterina Leusheva and Valentin Morenov
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Pouya Abdollahpour: Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz 5331817634, Iran
Seyyed Shahab Tabatabaee Moradi: Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz 5331817634, Iran
Ekaterina Leusheva: Petroleum Engineering Department, Saint Petersburg Mining University, 199106 St. Petersburg, Russia
Valentin Morenov: Petroleum Engineering Department, Saint Petersburg Mining University, 199106 St. Petersburg, Russia

Energies, 2022, vol. 15, issue 15, 1-13

Abstract: Lost circulation is considered a time-consuming, costly problem during the construction of oil and gas wells. There are several preventive techniques to mitigate this problem. Stress cage technology is a mechanical lost circulation method, in which the formation at the wellbore wall is strengthened to stop the creation of induced fractures as one of the main causes of lost circulation. In this research, a two-dimensional numerical model, considering the elastic, poro-elastic, and thermo-poro-elastic behavior of the rock, is built to investigate the effectiveness of the stress cage method. Results show that better performance of the technology is achieved if the fractures are bridged close to their apertures. Additionally, it was found that the difference between the elastic, poro-elastic, and thermo-poro-elastic models is slightly visible. The conclusion states that the application of the stress cage methods leads to an increase in hoop stress and subsequent formation fracture gradient.

Keywords: lost circulation; wellbore strengthening; kirsch equation; stresses around the borehole (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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