A Novel Method to Simulation of Heterogeneous Fractured Oil Reservoirs with Eclipse

Document Type : Original Article

Authors

1 Hakim Sabzevari University

2 Amirkabir University of Technology

Abstract

Fractured reservoirs form a major part of the country's hydrocarbon reservoirs. The proposed models for modeling fractured reservoirs, including dual porosity and dual permeability, consider the dispersion of the fractures in the reservoir to be homogeneous and consider their dimensions to be much smaller than the matrix dimensions. If there are large heterogeneous fractures in the reservoir, the use of these models does not provide acceptable results for reservoir simulation. In Eclipse 300 software, simulation of heterogeneous fractured reservoir with long fracture length is conducted by using CONDFRAC keyword to identify long permeable fractures which causes an error in the parts of the reservoir that have a curvature, due to the lack of correct detection of a specific plate perpendicular to the fracture plate and the overlap of the fractures, causes an error in the reservoir simulation results. In this study, in order to eliminate the existing shortcomings, a new method is presented by using the box definition of matrix and fractures network properties in Eclipse 100 software, which simplifies the reservoir simulation process and reduces the program execution time. The studied oil reservoir is carbonate type in the Arabian Formation, which includes heterogeneous fractures with long length. The simulation results are compared between the two methods presented in this study. Comparing the results of the single medium method with the new method for field oil in place (FOIP), revealed that the average difference between the two methods is less than 1.1% and reduces the simulation execution time by about 40%, which indicates the optimal performance of the new method.

Keywords

References

 

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Iranian Chemical Engineering Journal
Volume 20, Issue 114
May and June 2021
Pages 76-81

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