Influence of perforation erosion on multiple growing hydraulic fractures in multi-stage fracturing

Li, Yongming; Chen, Xiyu; Zhao, Jinzhou; Xu, Wenjun; Wu, Juan; Fu, Dongyu

doi:10.1016/j.ngib.2017.11.002

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…The model considers the shear stiffness degradation, post-peak softening, and residual phase of rock joints in the whole shearing process. Li et al (2018) examined the effect of the erosion of perforation. The results indicated that the erosion significantly deteriorated the nonuniform growth of multiple fractures.…”

Section: Introductionmentioning

confidence: 99%

Influence of the bedding plane on the propagation of multiple hydraulic fractures

Wang

Zheng

2023

Front. Earth Sci.

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The presence of bedding planes (BPs) in unconventional shale reservoirs is common and widespread. BPs always affect fracture propagation. The objective of this study was to investigate the impacts of BPs on multiple hydraulic fracturing. The BPs were assumed to be perpendicular to the direction of the fractures. Based on the block distinct element method, we established a numerical model to simulate multiple fracture propagation in reservoirs with BPs. The model considered the fluid partitioning of multiple fractures and the fracture interaction by stress shadow. The numerical simulations clearly showed that the BPs reduced the non-uniform growth of multiple fractures. The results indicated that when hydraulic fractures met BPs, the BPs likely prevented the hydraulic fractures from passing through the formation with a smaller stress contrast. When hydraulic fracturing in a formation containing BPs, the key problem is how to reduce the obstructive effects of the BPs to increase the length of the main fractures.

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Section: Introductionmentioning

confidence: 99%

Influence of the bedding plane on the propagation of multiple hydraulic fractures

Wang

Zheng

2023

Front. Earth Sci.

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“…With the background of the low oil prices, the large-stage multi-cluster fracturing technology, increasing the stage length to reduce the amount of bridge plugs and reducing the cluster spacing to improve the reservoir contact, is the key technology to reduce the cost and improve production (Fan et al, 2019). However, recent studies have shown that reducing fracture spacing will perform stronger stress interference and more uneven fracture length are obtained (Pan et al, 2014;Zhao et al, 2015;Li et al, 2017;Zhou et al, 2019). Pan et al (2014) established a three-dimensional finite element model to simulate the simultaneous propagation of multiple fractures in horizontal wells.…”

Section: Introductionmentioning

confidence: 99%

“…Their results show that induced stress may lead to the asymmetric propagation of the two wings of the fractures. Li et al (2017) studied the influence of perforation erosion on the fracture propagation of multiple clusters by a comprehensive model that couples perforation erosion effect and hydraulic fracture propagation. Their results show that the proppant in the sand slurry will destroy the perforations, resulting in a huge limit-entry capacity reduction, which in turn leads to a wider variation among the length of fractures in one stage.…”

Section: Introductionmentioning

confidence: 99%

Effects of Fracturing Parameters on Fracture Unevenness During Large-Stage Multi-Cluster Fracturing in Horizontal Wells

Rui

Zhou

et al. 2021

Front. Energy Res.

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Horizontal wellswith multi-cluster fracturing technology is an effective approach to exploit unconventional hydrocarbon reservoirs. The on-site diagnosis results indicate that multi-cluster fractures always tend to propagate unevenly due to stressinterference, therefore it is very essential to study the effect of fracturing parameters on fracture propagation unevenness. In this paper, the unconventional fracturing model (UFM, Unconventional Fracturing Model) is used to study the effect of multi-cluster fracturing parameters on fracture unevenness in a large stage. This model has been validated with the actual fracturing case on-site in the Longmaxi shale. The investigated parameters include completion parameters (cluster spacing, number of perforations per cluster), pumping parameters (fluid injection intensity and proppant injection intensity). Our simulation results show that firstly reducing fracture spacing will increase stress interference, andhydraulic fractures exhibit a “radial” pattern. Secondly, reducing the perforation number of a single cluster can promote the more uniform propagation of multi-cluster fractures. Thirdly, increasing the fluid injection intensity will increase the fracture length, but will also increase the fracture unevenness. Besides, the injection strength of the proppant has a little effect on the average fracture length and the unevenness of the fracture length. Finally, setting a reasonable cluster spacing and injection fluid strength can obtain a more uniform fracture propagation. Meanwhile reducing the number of perforations per cluster can also reach the goal of propagating evenly. This paper provides a certain reference for the optimization of multi-cluster fracturing parameters in large-stage and multi-cluster wells.

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A New Multi-Cluster Fracturing Simulation Model Coupled with Perforation Erosion: Based on the Continuous–Discontinuous Method

Huang

Zhou

et al. 2023

Rock Mech Rock Eng

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Influence of perforation erosion on multiple growing hydraulic fractures in multi-stage fracturing

Cited by 8 publications

References 17 publications

Influence of the bedding plane on the propagation of multiple hydraulic fractures

Influence of the bedding plane on the propagation of multiple hydraulic fractures

Effects of Fracturing Parameters on Fracture Unevenness During Large-Stage Multi-Cluster Fracturing in Horizontal Wells

A New Multi-Cluster Fracturing Simulation Model Coupled with Perforation Erosion: Based on the Continuous–Discontinuous Method

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