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  • Open Access


    Study on the Impact of Massive Refracturing on the Fracture Network in Tight Oil Reservoir Horizontal Wells

    Jianchao Shi1,2, Yanan Zhang3, Wantao Liu1,2, Yuliang Su3,*, Jian Shi1,2

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.5, pp. 1147-1163, 2024, DOI:10.32604/fdmp.2023.044500

    Abstract Class III tight oil reservoirs have low porosity and permeability, which are often responsible for low production rates and limited recovery. Extensive repeated fracturing is a well-known technique to fix some of these issues. With such methods, existing fractures are refractured, and/or new fractures are created to facilitate communication with natural fractures. This study explored how different refracturing methods affect horizontal well fracture networks, with a special focus on morphology and related fluid flow changes. In particular, the study relied on the unconventional fracture model (UFM). The evolution of fracture morphology and flow field after More >

  • Open Access


    Numerical Simulation of Diverter Materials in Hydraulic Fractures During Refracturing

    Daobing Wang1,*, Cheng Zheng1, Bo Yu1, Dongliang Sun1, Dingwei Weng2, Chunming He2, Meng Wang2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.26, No.4, pp. 1-2, 2023, DOI:10.32604/icces.2023.09205

    Abstract Refracturing has become an important technique for increasing hydrocarbon production due to the low oil prices. During refracturing, the granular diverter materials are injected to temporarily seal old fractures in subsurface. These diverter materials are usually carried by the fracturing fluid, which is a typical solid-fluid flow in the fracture [1-3]. Therefore, we need to thoroughly understand the flow mechanism of diverter materials in hydraulic fractures, which is the key to the success of refracturing treatment.
    Using the Euler-Lagrange method, this paper presents a multiphase model to numerically simulate the flow process of diverter materials in… More >

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