| Autor: |
Liu, Chuang, Zhang, JiaNing, Yu, Hao, Chen, Jie, Lu, DeTang, Wu, HengAn |
| Předmět: |
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| Zdroj: |
Journal of Natural Gas Science & Engineering; Apr2020, Vol. 76, pN.PAG-N.PAG, 1p |
| Abstrakt: |
A fully coupled fluid-solid three-dimensional model based on cohesive zone method is presented to simulate the interactions between hydraulic fracture (HF) and natural fracture (NF). Unknown interaction mechanisms of the crossing, arresting and bypassing are revealed. The interactions between HF and NF in three dimensions are shown to be more complex than in two dimensions. Numerical results demonstrate that vertical stress contrast plays a significant effect on the fracture geometry for single and multiple stages fracturing treatments. Multiple fractures propagation of different fracturing sequences under the influence of NFs distribution and in-situ stresses is investigated. For Texas-two step fracturing method, the propagation of interior HF in horizontal direction will be terminated by stress perturbation in closely spaced HFs. A method to weaken severe mechanical interactions and enlarge the separations of NFs is proposed. The findings provide some new insights for stimulation design to create fracture network. • The simulation of interactions between hydraulic and natural fractures in porous media is presented. • The intersection modes are sensitive to the vertical properties of formation. • The propagation of interior crack of Texas-two step fracturing can be restricted in closely spaced stages. • A method is proposed to weaken severe mechanical interactions and enlarge the separations of natural fracture. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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