Impact of Partially Cemented and Non-persistent Natural Fractures on Hydraulic Fracture Propagation

2016 ◽  
Vol 49 (11) ◽  
pp. 4519-4526 ◽  
Author(s):  
Wei Fu ◽  
Brandon C. Ames ◽  
Andrew P. Bunger ◽  
Alexei A. Savitski
Keyword(s):  
Hydraulic Fracture ◽  
Fracture Propagation ◽  
Natural Fractures ◽  
Hydraulic Fracture Propagation

Study on the effect of cemented natural fractures on hydraulic fracture propagation in volcanic reservoirs

Energy ◽  
2021 ◽  
pp. 122845
Author(s):  
Zhaoyi Liu ◽  
Zhejun Pan ◽  
Shibin Li ◽  
Ligang Zhang ◽  
Fengshan Wang ◽  
...  
Keyword(s):  
Hydraulic Fracture ◽  
Fracture Propagation ◽  
Natural Fractures ◽  
Hydraulic Fracture Propagation ◽  
Volcanic Reservoirs

scholarly journals Numerical Simulation of Hydraulic Fracture Propagation in Coal Seams with Discontinuous Natural Fracture Networks

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 113 ◽  
Author(s):  
Shen Wang ◽  
Huamin Li ◽  
Dongyin Li
Keyword(s):  
Hydraulic Fracture ◽  
Fracture Propagation ◽  
Fracture Network ◽  
Natural Fracture ◽  
Cohesive Element ◽  
Natural Fractures ◽  
Fracture Networks ◽  
Coal Seams ◽  
Hydraulic Fracture Network ◽  
Hydraulic Fracture Propagation

To investigate the mechanism of hydraulic fracture propagation in coal seams with discontinuous natural fractures, an innovative finite element meshing scheme for modeling hydraulic fracturing was proposed. Hydraulic fracture propagation and interaction with discontinuous natural fracture networks in coal seams were modeled based on the cohesive element method. The hydraulic fracture network characteristics, the growth process of the secondary hydraulic fractures, the pore pressure distribution and the variation of bottomhole pressure were analyzed. The improved cohesive element method, which considers the leak-off and seepage behaviors of fracturing liquid, is capable of modeling hydraulic fracturing in naturally fractured formations. The results indicate that under high stress difference conditions, the hydraulic fracture network is spindle-shaped, and shows a multi-level branch structure. The ratio of secondary fracture total length to main fracture total length was 2.11~3.62, suggesting that the secondary fractures are an important part of the hydraulic fracture network in coal seams. In deep coal seams, the break pressure of discontinuous natural fractures mainly depends on the in-situ stress field and the direction of natural fractures. The mechanism of hydraulic fracture propagation in deep coal seams is significantly different from that in hard and tight rock layers.

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