Time-dependent model for two-phase flow in ultra-high water-cut reservoirs: Time-varying permeability and relative permeability

• DOI: 10.1016/j.petsci.2024.03.025
• Publication Date: 2024-04-12T01:41:58Z
• Authors: Shao-Chun Wang; Na Zhang; Zhi-Hao Tang; Xue-Fei Zou; Qian Sun; Wei Liu
• Keywords: Relative permeability; Reservoir Simulation

For the ultra-high water-cut reservoirs, after long-term water injection exploitation, physical properties of reservoir change and heterogeneity becomes increasingly severe, which further aggravates spatial difference flow field. In this study, displacement experiments were employed to investigate variations in core permeability, porosity, relative permeability a large amount injection. A endpoint model was proposed by utilizing alternating conditional expectation (ACE) transformation describe variation based on experimental data. Based time dependent models for traditional oil-water two-phase improved discretized using mimetic finite method (MFD). The two cases launched confirm validation model. impact time-varying features production performance studied real flooding reservoir. results indicate that overall curve shifts right as increases. This shift corresponds transition towards more hydrophilic wettability decrease residual oil saturation. demonstrates excellent accuracy can be applied simulations physics. yields distinct outcomes. intensified channeling poor development effects. On other hand, enhances phase seepage capacity, facilitating displacement. comprehensive behavior is result combined influence these parameters, closely resemble actual conditions observed field exploitation. simulation technique paper continuously stably characterize dynamic changes during drive development. approach ensures reliability regarding distribution.