Simulation of Foam Enhanced-Oil-Recovery Processes Using Operator-Based Linearization Approach
نویسندگان
چکیده
Summary Foam injection is a promising enhanced-oil-recovery (EOR) technology that significantly improves the sweep efficiency of gas injection. Simulation foam/oil displacement in reservoirs an expensive process for conventional simulation because strongly nonlinear physics, such as multiphase flow and transport with oil/foam interactions. In this work, operator-based linearization (OBL) approach, combined representation foam by implicit-texture (IT) model two regimes, extended EOR process. The OBL approach highly foam-simulation problem transforming discretized conservation equations into quasilinear form using state-dependent operators. operators are approximated discrete on uniform mesh parameter space. numerical-simulation results validated three-phase fractional-flow theory flow. Starting initial guess depending fitting steady-state experimental data oil, regressed to observations gradient-optimization technique. A series numerical validation studies performed investigate accuracy proposed approach. shows good agreement analytical solutions at different conditions parameters. With finer grids, resolution better, but cost more computations. foam-quality scan accurately fitted data, except low-quality regime. regime, used IT cannot capture upward-tilting pressure gradient (or apparent viscosity) contours. 1D 3D clearly demonstrate stages propagation from inlet outlet, seen computed-tomography (CT) coreflood experiments: weak displaces most followed stronger lower oil saturation. direct method reduce nonlinearity complex physical problems, which can improve computational performance. Taking its account, data-driven OBL-based could serve platform efficient upscaling field-scale applications.
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ژورنال
عنوان ژورنال: Spe Journal
سال: 2021
ISSN: ['1930-0220', '1086-055X']
DOI: https://doi.org/10.2118/205399-pa