Rock Crack Propagation Mechanism of Oriented Perforation Hydraulic Fracture under Different Perforation Parameters

被引：17

作者：

Liu, Songyong ^{[1
,2
]}

Zhang, Deyi ^{[1
,2
]}

Liu, Hao ^{[1
,2
]}

机构：

[1] China Univ Min & Technol, Jiangsu Key Lab Mine Mech & Elect Equipment, Sch Mechatron Engn, Xuzhou 221116, Jiangsu, Peoples R China

[2] China Univ Min & Technol, Jiangsu Collaborat Innovat Ctr Intelligent Min Eq, Xuzhou 221116, Jiangsu, Peoples R China

来源：

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING | 2020年 / 45卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Crack propagation; Oriented perforation hydraulic fracture; Confining pressure ratio coefficient; Perforation azimuth angle; FINITE-ELEMENT-METHOD; POROUS-MEDIA; WELLBORE; INITIATION; STRESS; ADVANCEMENT; SIMULATION; GROWTH; MODEL;

D O I：

10.1007/s13369-020-04821-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In order to obtain the mechanism of crack propagation of oriented perforation hydraulic fracture and its effect on mechanical properties of rock samples, an experimental study on hydraulic fracture of rock samples without confining pressure was carried out. The confining pressure ratio coefficient was defined, and oriented perforation hydraulic fracture was numerically simulated based on the extended finite element method so as to explore the comprehensive influence of different perforation parameters. The results demonstrated that the crack initiates and propagates along the direction of perforation azimuth angle, and the crack of oriented perforation is slightly wider than that of non-oriented perforation. The difficulty of crack initiation and turning increases with the perforation azimuth angle and decreases with the confining pressure ratio coefficient. Crack initiation and propagation are mainly driven by tensile stress, and the crack initiation pressure increases with the perforation azimuth angle and the confining pressure ratio coefficient.

引用

页码：8711 / 8725

页数：15

共 36 条

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