Four-dimensional stress induced by hydraulic fracturing and long-term extraction for shale gas well platforms: Implications for refracturing design

作者：Zirui Yin, Fengshou Zhang, Xiaohua Wang, Lianyang Zhang, Haiyan Zhu · 发表于：Journal of Rock Mechanics and Geotechnical Engineering · 年份：2025 · DOI：10.1016/j.jrmge.2025.07.025 · 被引用次数：17 · 研究领域：Hydraulic Fracturing and Reservoir Analysis、Rock Mechanics and Modeling、Drilling and Well Engineering

Prior to refracturing, initial hydraulic fracturing and long-term production are performed, resulting in a complex temporal and spatial evolution of the stress field in the reservoir, known as four-dimensional (4D) stress evolution. However, the progression and underlying mechanisms of 4D stress evolution remain unclear. Therefore, this paper proposes an innovative simulation method that integrates the mechanical impacts related to hydraulic fracturing and the poroelastic effects associated with long-term extraction. We consider topographic variations, heterogeneous geological properties, and the irregular distribution of hydraulic fractures with different sizes. The method considers the entire process of opening, closing, and propping of hydraulic fractures. Furthermore, the actual shale gas production is precisely simulated by employing the production matching algorithm in conjunction with the bottomhole pressure history of six fractured horizontal wells. We quantitatively analyze the spatio-temporal evolution of the stress field resulting from mechanical and poroelastic effects. The results indicate that due to the mechanical effect, the horizontal stress difference within the region of fracture distribution has diminished by a range of 3.5−4.5 MPa, and the stress rotation angle is deemed negligible, as its peak value is only 4.03°. In addition, the poroelastic effect resulting from gas extraction progressively reduces the horizontal stress difference of the reservoir, mos...