A permeability model for the hydraulic fracture filled with proppant packs under combined effect of compaction and embedment

Dong Chen, Zhihui Ye, Zhejun Pan, Yingfang Zhou, Jialiang Zhang

Research output: Contribution to journalArticle

24 Citations (Scopus)
6 Downloads (Pure)

Abstract


Hydraulic fracture is the main flow path for gas transport. The proppants are man-made material that filled in the hydraulic fractures to keep them open and allow gas flow through. The permeability change of hydraulic fracture is controlled by the combined effect of compaction and embedment. In this study, we modeled the proppant embedment as a function of effective stress by a transformed Hertz contact model and a proposed power law model which is analogous to the Oliver-Pharr model. The results illustrate that the power law relationship could better fit the experimental data, because the Hertz model becomes invalid when the embedment is large compared to the proppant size. By incorporating the power law correlation into an existing theoretical permeability model as a function of effective stress, a permeability model for the hydraulic fracture filled with proppant packs under combined effect of compaction and embedment is developed. The new model is able to adequately describe the permeability data of proppant packs confined by rock core slices. Although this study puts forward the theoretical basis of the hydraulic permeability modelling under combined effect of compaction and embedment, more fundamental studies are required to investigate the contact behaviour between the proppant packs and the fracture face under various conditions. Therefore, the permeability model could be further improved by introducing the new advanced proppant embedment correlations.
Original languageEnglish
Pages (from-to)428-435
Number of pages8
JournalJournal of Petroleum Science and Engineering
Volume149
Early online date4 Nov 2016
DOIs
Publication statusPublished - Jan 2017

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Proppants
compaction
Compaction
Hydraulics
permeability
power law
effective stress
gas transport
effect
hydraulic fracturing
gas flow
Flow of gases
Rocks
hydraulics

Keywords

  • permeability
  • proppant pack
  • hydraulic fracture
  • effective stress
  • embedment

Cite this

A permeability model for the hydraulic fracture filled with proppant packs under combined effect of compaction and embedment. / Chen, Dong; Ye, Zhihui; Pan, Zhejun; Zhou, Yingfang; Zhang, Jialiang .

In: Journal of Petroleum Science and Engineering, Vol. 149, 01.2017, p. 428-435.

Research output: Contribution to journalArticle

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abstract = "Hydraulic fracture is the main flow path for gas transport. The proppants are man-made material that filled in the hydraulic fractures to keep them open and allow gas flow through. The permeability change of hydraulic fracture is controlled by the combined effect of compaction and embedment. In this study, we modeled the proppant embedment as a function of effective stress by a transformed Hertz contact model and a proposed power law model which is analogous to the Oliver-Pharr model. The results illustrate that the power law relationship could better fit the experimental data, because the Hertz model becomes invalid when the embedment is large compared to the proppant size. By incorporating the power law correlation into an existing theoretical permeability model as a function of effective stress, a permeability model for the hydraulic fracture filled with proppant packs under combined effect of compaction and embedment is developed. The new model is able to adequately describe the permeability data of proppant packs confined by rock core slices. Although this study puts forward the theoretical basis of the hydraulic permeability modelling under combined effect of compaction and embedment, more fundamental studies are required to investigate the contact behaviour between the proppant packs and the fracture face under various conditions. Therefore, the permeability model could be further improved by introducing the new advanced proppant embedment correlations.",
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author = "Dong Chen and Zhihui Ye and Zhejun Pan and Yingfang Zhou and Jialiang Zhang",
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AU - Zhou, Yingfang

AU - Zhang, Jialiang

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