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Reliability and Uncertainty of Prediction of Dynamic Elastic Constants in Reservoir Rock

Authors
Hamid Reza Nejati (Tarbiat Modares University) | Abdolhadi Ghazvinian (Tarbiat Modares University) | Mohsen Saemi (Tarbiat Modares University)
DOI
https://doi.org/10.2118/155503-PA
Document ID
SPE-155503-PA
Publisher
Society of Petroleum Engineers
Source
Journal of Canadian Petroleum Technology
Volume
51
Issue
03
Publication Date
May 2012
Document Type
Journal Paper
Pages
198 - 204
Language
English
ISSN
0021-9487
Copyright
2012. Society of Petroleum Engineers
Disciplines
5.6.3 Deterministic Methods, 4.1.5 Processing Equipment, 1.2.3 Rock properties
Keywords
Dynamic elastic constant, uncertainty, Monte Carlo simulation, reservoir rock
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445 since 2007
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SPE Non-Member Price: USD 35.00

Summary

The prediction of dynamic elastic constants of reservoir rocks is one of the most important aspects of petroleum engineering. In recent years, several studies have been performed for this purpose. Because of uncertainty and variability in natural materials, deterministic prediction of rock properties in the reservoir is not reasonable. The purpose of this study is to evaluate uncertainty in dynamic-elastic-constant prediction for reservoir rock. Dipole-shear-sonic-image (DSI) log data from one of the Saudi Arabian reservoirs are used to evaluate uncertainty in dynamic-elastic-property prediction. For this purpose, a multiple linear regression (MLR) is carried out to present an empirical equation for shear-wave (S-wave) velocity prediction. Then, probabilistic analysis using Monte Carlo simulation (MCS) is performed to evaluate the uncertainty and reliability in prediction of dynamic elastic constants (Young's modulus and Poisson's ratio). On the basis of the analysis, uncertainty and variability of rock elastic constants are considered, and the value of Young's modulus and Poisson's ratio in a special interval from the reservoir are determined with a certain probability. Finally, the impact of log-data parameters on the value of rock elastic constants in the reservoir interval is assessed.

File Size  3 MBNumber of Pages   7

References

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