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Also, the numerical model parameters are calibrated using PEST, an automated parameter estimation code.
The calibration methodology relied on a genetic algorithm strategy which allowed estimating and updating numerical model parameters, particularly the elastic properties of materials.
Table 4 Basic parameters of the numerical model Parameters Size of grids (m) 10 × 10 Porosity 12 Permeability (×10−3μm2) 0.6 Oil saturation 50 Reservoir thickness (m) 15 Original formation pressure (MPa) 15 Reservoir capacity 0.91 Oil viscosity (mPa s) 1.5 Oil density (g/cm3) 0.83.
All numerical model parameters are listed in Supporting Information Table S1.
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In the 1990s, BGA were widely used in the scope of engineering with the publication of 'Hand book of Genetic Algorithm', such as reservoir operation optimization (Jothiprakash and Shanthi 2006), numerical model parameter optimization (Tang et al. 2010), inverse problem research (Dai and Wang 2006), and so on.
Thanks to MCM's design, any numerical model parameter can in principle be calibrated, provided that suitable data is available.
Test results also gave some indications on numerical model simulation parameters.
Open image in new window Fig. 3 Geometrical and numerical model and parameters; a vertical stope parameters, with applied stress and mechanical properties of the backfill and the rock mass; b finite element model.
A complete list of the numerical model domain parameters as well as boundary conditions is given in Table 2.
Combination of microseismic monitoring and numerical simulation provides a more objective basis for the numerical model and parameters and a solid mechanical foundation for the microseismic monitoring.
The inference engine will drive the decision tree to explore the most probable option of numerical model and parameters matching the real problem specifications.
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