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A Mechanism of Unstable Growth of Hydraulic Fractures in Laboratory Experiments
Development of hydraulic fracture in lab tests is accompanied by a significant pressure drop in fracturing fluid. This is not normally observed in the field. The pressure drop suggests the presence of a stage of unstable fracture growth in the laboratory samples. The paper shows that unstable fracture growth is produced by interaction between the fracture and free sample surfaces that are parallel to the fracture. This is another difference from the field situation on top of the scale difference, since in the field the presence of a nearby free surfaces parallel and close to the hydraulic fractures is a rare occurrence. This finding is important in analysing the results of laboratory experiments and developing methods of their upscaling.
A Mechanism of Unstable Growth of Hydraulic Fractures in Laboratory Experiments
Development of hydraulic fracture in lab tests is accompanied by a significant pressure drop in fracturing fluid. This is not normally observed in the field. The pressure drop suggests the presence of a stage of unstable fracture growth in the laboratory samples. The paper shows that unstable fracture growth is produced by interaction between the fracture and free sample surfaces that are parallel to the fracture. This is another difference from the field situation on top of the scale difference, since in the field the presence of a nearby free surfaces parallel and close to the hydraulic fractures is a rare occurrence. This finding is important in analysing the results of laboratory experiments and developing methods of their upscaling.
A Mechanism of Unstable Growth of Hydraulic Fractures in Laboratory Experiments
Springer Ser.Geomech.,Geoengineer.
Pasternak, Elena (editor) / Dyskin, Arcady (editor) / Dyskin, Arcady V. (author) / Pasternak, Elena (author) / He, Junxian (author)
International Workshop on Bifurcation and Degradation in Geomaterials ; 2022 ; perth, WA, Australia
Multiscale Processes of Instability, Deformation and Fracturing in Geomaterials ; Chapter: 13 ; 127-135
2022-12-13
9 pages
Article/Chapter (Book)
Electronic Resource
English
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