On the pressure decline analysis for hydraulic fractures in elasto-plastic materials

M. Wrobel*, P. Papanastasiou, M. Dutko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (SciVal)

Abstract

In this paper the problem of a plane strain hydraulic fracture in elasto-plastic material is analyzed. The analysis is based on Finite Element Method computations of crack propagation and closure to simulate the Mini-Frac calibration test. The basic trends of fracture evolution are identified for both, the propagation and the closure stage in elasto-plastic materials and compared with the results obtained for purely elastic deformation of rock. Pressure decline analysis is conducted to identify the closure stress and leak-off coefficient. The results show that the standard techniques of pressure decline analysis can be adopted also for the case where the fractured material deforms inelastically.

Original languageEnglish
Article number100421
JournalGeomechanics for Energy and the Environment
Volume33
Early online date24 Nov 2022
DOIs
Publication statusPublished - 01 Mar 2023

Keywords

  • Hydraulic fracture
  • Mini-Frac test
  • Plane strain crack
  • Plastic deformation
  • Pressure decline analysis

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