«Geology, geophysics and development of oil and gas fields»

METHODOLOGY OF SELECTING THE OPTIMAL OBJECTIVE FUNCTION FOR A RESERVOIR MODEL HISTORY MATCHING

UDC: 622.276+532+519.876
DOI: 10.33285/2413-5011-2021-1(349)-30-38

Authors:

¹ Petroleum Learning Centre of Tomsk Polytechnic University, Tomsk, Russian Federation

Keywords: methodology for an objective function selection, geological-hydrodynamic modeling, oil field, numerical model, objective function, mismatch expression, mismatch normalization, objective function components, weight coefficients, automated history matching, optimization algorithms, history matching quality, history matching efficiency

Annotation:

The article is devoted to the problem of selecting an objective function formulation for automated history matching of reservoir models of oil and gas fields. To carry out history matching, it is necessary to define the objective function that describes the discrepancy between simulation results and the observed data. The formulation of the objective function is important because its value directly affects the optimization process, allowing the algorithm to move in the right direction in the search of solutions. The purpose of the study is to develop a methodology for selecting the optimal objective function for a hydrocarbon reservoir model history matching. The research methods are comparative analysis and computational experiments using a synthetic model and a model of a real oil field located in Siberia. Based on the results of the study, a methodology for selecting the optimal objective function for history matching of a geological-hydrodynamic model of a hydrocarbon reservoir depending on the adaptation task was developed and described. The proposed methodology allows achieving good quality history matching with minimal computational costs compared to history matching without the methodology.

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