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

M. Wrobel; P. Papanastasiou; M. Dutko

doi:10.1016/j.gete.2022.100421

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

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

^*Corresponding author for this work

Department of Mathematics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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 language	English
Article number	100421
Number of pages	14
Journal	Geomechanics for Energy and the Environment
Volume	33
Early online date	23 Feb 2023
DOIs	https://doi.org/10.1016/j.gete.2022.100421
Publication status	Published - 31 Mar 2023

Keywords

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

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10.1016/j.gete.2022.100421

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High Performancemodels for fluid driven fracture evolution: Development and environmental application
Dutko, M. (PI)
Royal Academy of Engineering
01 Sept 2021 → 31 Aug 2023
Project: Externally funded research
Ser Cymru IFA - Development of the tip element to account for singular physical fields near the crack tip and various propagation regimes.
Mishuris, G. (PI)
Welsh European Funding Office
01 Jul 2020 → 30 Jun 2021
Project: Externally funded research

Cite this

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title = "On the pressure decline analysis for hydraulic fractures in elasto-plastic materials",

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.",

keywords = "Hydraulic fracture, Mini-Frac test, Plane strain crack, Plastic deformation, Pressure decline analysis",

author = "M. Wrobel and P. Papanastasiou and M. Dutko",

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T1 - On the pressure decline analysis for hydraulic fractures in elasto-plastic materials

AU - Wrobel, M.

AU - Papanastasiou, P.

AU - Dutko, M.

PY - 2023/3/31

Y1 - 2023/3/31

N2 - 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.

AB - 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.

KW - Hydraulic fracture

KW - Mini-Frac test

KW - Plane strain crack

KW - Plastic deformation

KW - Pressure decline analysis

U2 - 10.1016/j.gete.2022.100421

DO - 10.1016/j.gete.2022.100421

M3 - Article

AN - SCOPUS:85143279590

SN - 2352-3808

VL - 33

JO - Geomechanics for Energy and the Environment

JF - Geomechanics for Energy and the Environment

M1 - 100421

ER -

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

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Projects

High Performancemodels for fluid driven fracture evolution: Development and environmental application

Ser Cymru IFA - Development of the tip element to account for singular physical fields near the crack tip and various propagation regimes.

Cite this