Received date: 2019-06-10
Revised date: 2019-07-10
Online published: 2020-03-25
The stress field has a great influence on fracture turning and expansion and the study on stress distribution has a guiding significance for the fracturing parameters optimization. Based on the extend finite element method, the Abaqus software was used to investigate the influence of principal stress differences and fracture inclines on normal stress and shear stress of fracture, the influence of perforation angles on fracture trajectory, shear stress and tangential displacement, and the influence of fracture spacing on fracture morphology, shear stress and pore pressure. The results show that the normal stress on the fracture decreases with the increase of fracture inclination angle, and the shear stress increases first and then decreases with the increase of fracture inclination angle, reaching the maximum in the direction of 45°. When the fracture angle keeps constant, the normal stress and shear stress on the fracture increase with the increasing perforation angle, and the radius of fracture turning decreases with the increasing perforation angle. With the condition of high principal stress difference and perforation angle of 45°, it is conducive to produce shear failure in the rock of the fracture entrance. In the simultaneous propagation of multiple fractures process, the shear stress in the disturbance region increase with the decrease of fracture spacing and the fluid distribution in the fracture at the disturbance side increase with the increasing fracture spacing. With the condition of great principal stress difference, the perforation method with small cluster spacing and 45° direction is beneficial to shear failure of rocks.
Jin-zhou Zhao , Jin Zhao , Yong-quan Hu , Ting Huang , Xin-jia Liu . Study on stress field distribution of hydraulic fracturing[J]. Natural Gas Geoscience, 2019 , 30(12) : 1677 -1683 . DOI: 10.11764/j.issn.1672-1926.2019.07.012
1 |
赵金,张遂安,马东明,等 . 注二氧化碳提高煤层气采收率数值模拟[J]. 天然气与石油, 2012, 6(1): 67-70.
|
2 |
赵金,张遂安,曹立虎 . 页岩气与煤层气吸附特征对比实验研究[J]. 天然气地球科学, 2013,24(1):176-181.
|
3 |
赵金, 张遂安 . 煤层气排采压降传播规律[J]. 煤炭科学技术, 2013, 41(2): 40-45.
|
4 |
袁玉,赵金,曹立虎,等 . 水力喷砂射孔技术在煤层气开发中的应用 [J]. 煤炭科学技术,2016, 44(5): 68-73.
|
5 |
吴奇,胥云,张守良,等 . 非常规储集层体积改造技术核心理论与优化设计关键[J]. 石油学报, 2014, 35(4): 706-714.
|
6 |
曾庆磊,庄茁,柳占立,等 . 页岩水力压裂中多簇裂缝扩展的全耦合模拟[J]. 计算力学学报, 2016, 33(4): 643-648.
|
7 |
胥云,陈铭,吴奇,等 . 水平井体积改造应力干扰计算模型及其应用[J]. 石油勘探与开发, 2016, 43 (5):780-786.
|
8 |
陈勉 . 页岩气储层水力裂缝转向扩展机制[J].中国石油大学学报:自然科学版,2013, 37(5):88-94.
|
9 |
翁定为,付海峰,包力庆,等 . 水平井平面射孔实验研究[J]. 天然气地球科学, 2018, 29(4): 572-578.
|
10 |
赵金洲,尹庆,李勇明,等 . 重复压裂气井热—固耦合应力场拟三维模型[J]. 天然气地球科学, 2015, 26(11): 2131-2136.
|
11 |
潘林华,张士诚,程礼军,等 .水平井“多段分簇”压裂簇间干扰的数值模拟[J].天然气工业,2014,34(1):74-79.
|
12 |
曾凡辉, 郭建春, 刘恒, 等 . 致密砂岩气藏水平井分段压裂优化设计与应用[J]. 石油学报, 2013, 34(5): 959-968.
|
13 |
邓燕,尹建,郭建春 .水平井多段压裂应力场计算新模型[J].岩土力学,2015,36(3):660-666.
|
14 |
赵金洲,陈曦宇,刘长宇,等 .水平井分段多簇压裂缝间干扰影响分析[J].天然气地球科学, 2015,26(3): 533-538.
|
15 |
李勇明,王琰琛,赵金洲,等 .考虑多缝应力干扰的页岩储层压裂转向角计算模型[J].天然气地球科学, 2015, 26(10), 1979-1983.
|
16 |
徐加祥,丁云宏,杨立峰,等 . 基于扩展有限元的水力压裂缝间干扰及裂缝形态分析[J]. 天然气地球科学, 2018, 29(9): 1356-1363.
|
17 |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 |
|
23 |
|
24 |
|
/
〈 |
|
〉 |