Modelling the effect of injection system compressibility and viscous fluid flow on hydraulic fracture breakdown pressure

A. P. Bunger, A. Lakirouhani, E. Detournay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

35 Scopus citations

Abstract

Estimating the maximum stress in a rock mass based on hydraulic fracturing data typically depends on identification of the breakdown and/or secondary breakdown ("reopening") pressure. Errors in this estimate can be attributed to injection system compressibility, coupled viscous fluid flowin the hydraulic fracture, and crack growth through the varying stress field surrounding a wellbore. The role of these mechanisms has not been well-quantified. Here, a coupled numerical model that includes the compressibility of the injection system and the flow of a viscous fluid in a plane-strain hydraulic fracture extending from a wellbore in the presence of a non-isotropic in situ stress field provides a basic tool for estimating the order of the error associated with analysis of the breakdown pressure under non-ideal conditions. The result is model-based guidelines on the values of relevant dimensionless parameter groups to ensure sufficient accuracy, and when these guidelines cannot be met under field conditions, the model can be further applied to obtain first order corrections that account for compressibility, viscosity, and near-wellbore effects.

Original languageEnglish (US)
Title of host publicationRock Stress and Earthquakes - Proceedings of the 5th International Symposium on In-Situ Rock Stress
PublisherTaylor and Francis - Balkema
Pages59-67
Number of pages9
ISBN (Print)9780415601658
DOIs
StatePublished - Jan 1 2010
Event5th International Symposium on In-Situ Rock Stress, ISRSV 2010 - Beijing, China
Duration: Aug 25 2010Aug 27 2010

Publication series

NameRock Stress and Earthquakes - Proceedings of the 5th International Symposium on In-Situ Rock Stress

Other

Other5th International Symposium on In-Situ Rock Stress, ISRSV 2010
CountryChina
CityBeijing
Period8/25/108/27/10

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    Bunger, A. P., Lakirouhani, A., & Detournay, E. (2010). Modelling the effect of injection system compressibility and viscous fluid flow on hydraulic fracture breakdown pressure. In Rock Stress and Earthquakes - Proceedings of the 5th International Symposium on In-Situ Rock Stress (pp. 59-67). (Rock Stress and Earthquakes - Proceedings of the 5th International Symposium on In-Situ Rock Stress). Taylor and Francis - Balkema. https://doi.org/10.1201/9780415601658-11