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

被引：4
作者：
Wrobel, M. [1 ]
Papanastasiou, P. [1 ]
Dutko, M. [2 ,3 ]
机构：
[1] Univ Cyprus, Dept Civil & Environm Engn, CY-1678 Nicosia, Cyprus
[2] Rockfield Software Ltd, Swansea SA1 8AS, Wales
[3] Aberystwyth Univ, Dept Math, Ceredigion SY23 3BZ, Wales
来源：
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT | 2023年 / 33卷
关键词：
Hydraulic fracture; Plane strain crack; Plastic deformation; Mini-Frac test; Pressure decline analysis; IMPACT; FLUID; PROPAGATION; PLASTICITY; ALGORITHM;
D O I：
10.1016/j.gete.2022.100421
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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. (c) 2022 Elsevier Ltd. All rights reserved.
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页数：14
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