Numerical simulation of hydraulic fracturing process in mixed ground

J. Wang, Y. Deng, X. Liu, H. Peng, Y. Yin, L. Wu, Z. Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The crack initiation and propagation process of hydraulic fracturing were reproduced using a coupled particle flow code (PFC) computational fluid dynamics (CFD) method in mixed ground. The breakdown pressure of mixed ground was investigated based on orthogonal test principles and five influencing factors were analysed. The crack propagation process in mixed ground was investigated under different normal bond strength ratios between hard and soft grounds and stress ratio. The minimum principal stress has the most influence on breakdown pressure, followed by stress ratio. Stress ratio was the determining factor for crack initiation direction. The result can be used in the engineering design of hydraulic fracturing projects.

Original languageEnglish
Title of host publicationISRM AfriRock - Rock Mechanics for Africa
PublisherInternational Society for Rock Mechanics
Pages837-846
Number of pages10
ISBN (Electronic)9781920410995
StatePublished - 1 Jan 2017
EventISRM AfriRock 2017 - Rock Mechanics for Africa - Cape Town, South Africa
Duration: 3 Oct 20175 Oct 2017

Publication series

NameISRM AfriRock - Rock Mechanics for Africa
Volume2017-October

Other

OtherISRM AfriRock 2017 - Rock Mechanics for Africa
CountrySouth Africa
CityCape Town
Period3/10/175/10/17

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