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arXiv · 2202.06581

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

Michal Wrobel·Panos Papanastasiou·Martin Dutko
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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.

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Michal Wrobel, Panos Papanastasiou, Martin Dutko. 2022-02-14. On the pressure decline analysis for hydraulic fractures in elasto-plastic materials. https://doi.org/10.1016/j.gete.2022.100421

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