時 間：2024年10月30日（周三）9:00-11:00
報告地點：全國重點實驗室A403
報告題目：Optimizing Hydraulic Fracturing: The Importance of Reservoir Rock Characterization under True-Triaxial Loading
報 告 人：Giovanni Grasselli教授
報 告 人：Giovanni Grasselli,多倫多大學教授。主要從事混合有限-離散元法（FDEM）數值模擬技術、實驗可視化技術以及應用于隧道施工和水力壓裂研究的地質力學機理等領域的研究。Grasselli教授在意大利帕爾馬大學取得土木工程本科學位，在瑞士洛桑聯邦理工學院取得巖石力學博士學位；在2006年加入多倫多大學任教之前，曾在倫敦帝國理工學院（英國）和桑迪亞國家實驗室（美國）擔任研究員，并曾擔任勞倫森大學Mirarco研究所的副主任（加拿大）；曾榮獲2004年ISRM Rocha獎章、2019年CGS的John A. Franklin巖石力學獎以及2024年PEO工程獎章。
報告摘要：A series of true-triaxial hydraulic fracturing tests were conducted on shale specimens from the Montney formation, both from outcrop and at-depth samples. These tests were designed to simulate in-situ conditions, replicating open-hole fluid injection at depth. The goal was to evaluate the effects of flaws, anisotropy, intermediate stress, and fluid viscosity on fracture behavior. Interestingly, the experiments revealed that fractures formed against σ2 (the intermediate principal stress) rather than σ3 (the minimum principal stress), challenging the conventional belief that fractures always propagate in the direction of the minimum stress. This suggests that tensile strength anisotropy plays a role as significant as in-situ stresses in determining fracture initiation and propagation. The outcome of this research is a new conceptual model that considers both the magnitude of in-situ stresses and the anisotropy in the rock's tensile strength, identifying the path of least mechanical resistance. Another key finding highlights the impact of fluid viscosity on the complexity of the resulting fracture network.
歡迎全校師生參加！
油氣藏地質及開發工程全國重點實驗室
SPE成都分部
石油與天然氣工程學院
天然氣現代產業學院
西南石油大學SPE學生分會
科學技術發展研究院
