Journal
JOURNAL OF APPLIED GEOPHYSICS
Volume 129, Issue -, Pages 28-35Publisher
ELSEVIER
DOI: 10.1016/j.jappgeo.2016.03.027
Keywords
Fuzzy C-Means Clustering; Chaotic Quantum Particle Swarm Optimization; Fluid factor; Fluid identification; Carbonate rock
Funding
- National Youth Science Fund Project [41204093]
- CNPC Fundamental Research Project [2014E-32]
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Considering the fact that the fluid distribution in carbonate reservoir is very complicated and the existing fluid prediction methods are not able to produce ideal predicted results, this paper proposes a new fluid identification method in carbonate reservoir based on the modified Fuzzy C-Means (FCM) Clustering algorithm. Both initialization and globally optimum cluster center are produced by Chaotic Quantum Particle Swarm Optimization (CQPSO) algorithm, which can effectively avoid the disadvantage of sensitivity to initial values and easily falling into local convergence in the traditional FCM Clustering algorithm. Then, the modified algorithm is applied to fluid identification in the carbonate X area in Tarim Basin of China, and a mapping relation between fluid properties and pre-stack elastic parameters will be built in multi-dimensional space. It has been proven that this modified algorithm has a good ability of fuzzy cluster and its total coincidence rate of fluid prediction reaches 97.10%. Besides, the membership of different fluids can be accumulated to obtain respective probability, which can evaluate the uncertainty in fluid identification result. (C) 2016 Elsevier B.V. All rights reserved.
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