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Fracturing–Flooding for Low-Permeability Oil Reservoirs: A Coupled Model Integrating DDM and Black-Oil Model
Fracturing–flooding is an effective measure to enhance flow channels in low-permeability oil reservoirs. However, it is still in the exploratory stage, with a lack of numerical simulation research. This paper establishes a fluid–solid coupling model suitable for fracturing–flooding at the reservoir scale. The model uses the displacement discontinuity method (DDM) and the black-oil model to conduct simultaneous tracking of the fracture propagation and fluid flow in the reservoir. The accuracy of the proposed model is validated by comparing its results with data from the KGD and PKN models and the field. This paper explores the advantages of fracturing–flooding and its influencing factors. The results demonstrate that fracturing–flooding can increase oil production and reduce water cut under the influence of artificial fractures, resulting in a 1.13 times higher cumulative oil production compared to water flooding. In addition, fracturing–flooding is particularly suitable for reservoirs characterized by suboptimal permeability conditions or strong heterogeneity. However, its effectiveness is diminished in reservoirs with well-developed natural fractures. The case studies in this paper reveal that a cumulative injection volume equivalent to 6% of the reservoir pore volume is reasonable. Furthermore, oil displacement agents enhance the effectiveness of fracturing–flooding by expanding the pressure influence and reducing injected water breakthrough. Overall, this research provides valuable technical support for the design and implementation of fracturing–flooding.
We propose a coupled fluid-solid algorithm for fracturing-flooding.
Fracturing-flooding achieves 1.13 times the oil recovery of water-flooding.
Fracturing-flooding suits reservoirs with poor properties or high heterogeneity.
The injection volume should be restricted to 6% of the reservoir pore volume.
Oil displacement agents enhance the effectiveness of fracturing-flooding.
Fracturing–Flooding for Low-Permeability Oil Reservoirs: A Coupled Model Integrating DDM and Black-Oil Model
Fracturing–flooding is an effective measure to enhance flow channels in low-permeability oil reservoirs. However, it is still in the exploratory stage, with a lack of numerical simulation research. This paper establishes a fluid–solid coupling model suitable for fracturing–flooding at the reservoir scale. The model uses the displacement discontinuity method (DDM) and the black-oil model to conduct simultaneous tracking of the fracture propagation and fluid flow in the reservoir. The accuracy of the proposed model is validated by comparing its results with data from the KGD and PKN models and the field. This paper explores the advantages of fracturing–flooding and its influencing factors. The results demonstrate that fracturing–flooding can increase oil production and reduce water cut under the influence of artificial fractures, resulting in a 1.13 times higher cumulative oil production compared to water flooding. In addition, fracturing–flooding is particularly suitable for reservoirs characterized by suboptimal permeability conditions or strong heterogeneity. However, its effectiveness is diminished in reservoirs with well-developed natural fractures. The case studies in this paper reveal that a cumulative injection volume equivalent to 6% of the reservoir pore volume is reasonable. Furthermore, oil displacement agents enhance the effectiveness of fracturing–flooding by expanding the pressure influence and reducing injected water breakthrough. Overall, this research provides valuable technical support for the design and implementation of fracturing–flooding.
We propose a coupled fluid-solid algorithm for fracturing-flooding.
Fracturing-flooding achieves 1.13 times the oil recovery of water-flooding.
Fracturing-flooding suits reservoirs with poor properties or high heterogeneity.
The injection volume should be restricted to 6% of the reservoir pore volume.
Oil displacement agents enhance the effectiveness of fracturing-flooding.
Fracturing–Flooding for Low-Permeability Oil Reservoirs: A Coupled Model Integrating DDM and Black-Oil Model
Rock Mech Rock Eng
Cui, Chuanzhi (author) / Wang, Junkang (author) / Qian, Yin (author) / Li, Jing (author) / Lu, Shuiqingshan (author)
Rock Mechanics and Rock Engineering ; 58 ; 4069-4089
2025-03-01
21 pages
Article (Journal)
Electronic Resource
English
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