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ARTICLE
Numerical Simulation Study on the Regularity of CIS Bedding Hydraulic Fracturing Based on 3D Penny-Shape Model
JiangtaoLi1,2,*
1 School of Resources and Civil Engineering, Northeastern University, Shenyang, 110004, China
2 CCTEG Shenyang Research Institute, Shenyang, 110016, China
* Corresponding Author: JiangtaoLi. Email:
Intelligent Automation & Soft Computing 2020, 26(5), 1047-1061. https://doi.org/10.32604/iasc.2020.010136
Abstract
In view of poor permeability of coal seam and soft coal quality in
China's coal mining area, a point hydraulic fracturing method suitable for the
occurrence characteristics of coal seam is put forward based on the characteristics
of coal seam hydraulic fracturing and the field practical experience of coal seam
hydraulic fracturing for many years. A theoretical and mathematical model of
hydraulic fracturing is established. Based on the large-scale finite element
software ABAQUS, numerical simulation of two dimensional and three
dimensional hydraulic fracturing is carried out, and the fracture propagation law
and its parameter sensitivity of coal seam point hydraulic fracturing are simulated
and analyzed. The results show that when multi point synchronous hydraulic
fracturing on the same layer borehole is carried out, there will be a certain
coherence effect between fracture cracks when the interval between fracturing
points is small. In the same fracturing time, the minimum effective stress in the
coal body between the cracks will be reduced by about 10% when the gap between
the cracks increase by 25%. We can use the fluctuation of effective stress field
around fracture before and after fracturing as a discriminant index for effective
radius of hydraulic fracturing. In general, it is advisable to have 10%~20%
amplitude of effective stress field before and after fracturing.
Keywords
Cite This Article
. JiangtaoLi, "Numerical simulation study on the regularity of cis bedding hydraulic fracturing based on 3d penny-shape model,"
Intelligent Automation & Soft Computing, vol. 26, no.5, pp. 1047–1061, 2020.