Research on the influence of stress on the penetration behavior of hydraulic fracture: Perspective from failure type of beddings

Frontiers in Earth Science

Earth Science

Yaoqing Hu¹  Yuesong Bai²  Yongxiang Zheng³  Wei Wang³  Jin Tan⁴  Xingchuan Liao⁴ 

[1] Institute of Mining Technology, Taiyuan University of Technology, Taiyuan, China;Institute of Mining Technology, Taiyuan University of Technology, Taiyuan, China;Shanxi Wangjialing Coal Industry Co., Ltd., Xinzhou, China;Key Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, Hebei, China;School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan, China;

关键词: failure types of bedding;    penetration behavior;    shear-failure bedding plane;    tensile-failure bedding plane;    stress;   

DOI  :  10.3389/feart.2023.1163295

 received in 2023-02-10, accepted in 2023-03-06,  发布年份 2023

来源: Frontiers

【 摘 要 】

The failure types of bedding determine the penetration behavior of hydraulic fracture. A stratum model containing bedding was established based on the 3D block distinct element method to explore the penetration behavior of hydraulic fractures with different types of bedding. The mechanics of hydraulic fractures penetrating the shear- failure bedding plane and tensile-failure bedding plane were analyzed. The results showed that the shear-failure bedding plane was more difficult to expand than the tensile-failure bedding plane after the hydraulic fracture turns to bedding plane. The initial stress magnitude controls the expansion difficulty of hydraulic fractures, and the high stress magnitude attenuated penetration behavior. The vertical stress affected the shear failure by increasing the shear strength of the bedding plane. It affected the tensile failure by increasing the initiation stress of the bedding plane. The effect of horizontal stress on the penetration behavior included the influence on the initiation stress of vertical joints and the enhancement of the interference stress on the horizontal bedding plane. The conclusions can provide the guidance for hydraulic fracturing in reservoir with bedding planes.

【 授权许可】

Unknown   
Copyright © 2023 Bai, Hu, Liao, Tan, Zheng and Wang.