摘要:This study aimed at performing a borehole computer experiment via a modified borehole model. An Orthogonal Array Latin Hypercube Design, OA (49, 8) LHD with parameters’ specification N=49 and k=8 was used to develop a borehole computer experiment using the existing borehole model and a modified borehole model with the same assumed ranges of values for the 8 input variables of a borehole model. The borehole model was modified based on the data generated from the existing model and no assumption of a borehole model was relaxed. The modified model has four newly introduced parameters and a nonlinear regression fit in MATLAB (The MathWorks, Inc. 2016) was used to estimate the values of the four parameters. The four parameters β1, β2, β3 and β4 have the estimated values of 0.4538, -0.9986, -0.1176 and 9.2245, respectively. The modified borehole model performs well in developing a borehole computer experiment with the results obtained which are close to those of the existing model as shown in Figure 1.This study concludes that a borehole experiment can be implemented through a modified borehole model which gives a fair representation of the existing borehole model without relaxing the assumptions of the model. This approach on the modification of an existing borehole model is novel in the world of research in this field.
关键词:Computer experiment;Existing borehole model;Modified borehole model;orthogonal array Latin hypercube design;Parameters.