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- W2383395223 abstract "Interpretation of well-logging data for complex lithology is an optimization problem under the linear constraint condition,and ill-posed because of the solution nonuniqueness and instability.So it is very important how to evaluate and choose an interpretation model.In this paper,the problem to evaluate the confidence region of reservoir parameters and to calculate their errors under the linear constraint condition is systematically studied using statistical theory and non-linear optimization technique. The formula to compute their confidence region and errors for the complex model is given by combination of gradient projection method and singular-value-decomposition (SVD).The method to evaluate the stability and reliability of the model is advanced. Finally the effective measure to enhance the stability and reliability is performed through numerical examples.The size of minimum singular value of the response function is the main element to affect the stability and reliability of the models.When the size is higher,the model is usually good,otherwise is not.So choosing the comprehensive model with higher singular values can increase interpreting model quality by amalgamation of some unknown parameters of complex models." @default.
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- W2383395223 date "1998-01-01" @default.
- W2383395223 modified "2023-09-23" @default.
- W2383395223 title "EVALUATION OF STABILITY AND RELIABILITY OF COMPLEX LITHOLOGY INTERPRETING MODELS" @default.
- W2383395223 hasPublicationYear "1998" @default.
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