Transient Temperature Impact on Deep Reservoir Fracturing

Hydraulic fracturing enables the commercial development of unconventional resources in shales and tight formations. The conductivity and complexity of created fractures are critically dependent on the rheology of fracking fluid and the mechanics properties of rocks. Literatures show that both the rh...

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Bibliographic Details
Published in:Geofluids 2021-01, Vol.2021, p.1-9
Main Authors: Jiang, Yu, Killough, John E., Wu, Xingru, Cui, Yongzheng
Format: Article
Language:English
Subjects:
Complexity
Computational fluid dynamics
Crack initiation
Crack propagation
Deceleration
Finite difference method
Fluid flow
Fracture mechanics
Geometry
Heat transfer
Hydraulic fracturing
Mechanics
Optimization
Production controls
Propagation
Rheological properties
Rheology
Rock properties
Stress state
Temperature effects
Unconventional resources
Viscosity
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Summary:Hydraulic fracturing enables the commercial development of unconventional resources in shales and tight formations. The conductivity and complexity of created fractures are critically dependent on the rheology of fracking fluid and the mechanics properties of rocks. Literatures show that both the rheology of fracturing fluid and fracture propagation dynamics are affected by the temperature of fracturing fluid. Neglecting the temperature transient behaviour may defeat the purpose of fracturing optimization during fracture initiation, propagation, and sand packing. The objective of this paper is to investigate the impact of temperature on fracturing design by studying the transient temperature behaviour across a complex wellbore using numerical modelling by coupling a finite difference heat transfer model with a dynamic fracture propagation model. The study results show that with the injection of cold fracturing fluid, hydraulic fracture propagation is decelerated, and production prediction is thus lessened compared with the case ignoring temperature effect. For multistage fractured wells, fracture geometry enlarges along the fluid flow direction in a horizontal segment. This potentially lowers the cost of hydraulic fracturing designs.
ISSN:1468-8115
1468-8123
DOI:10.1155/2021/6653442