Analytical and Experimental Investigation of Scaling the Static and Dynamic Imbibition in Fractured Reservoirs

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Mirzaei-Paiaman, Abouzar | 2014

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Type of Document: Ph.D. Dissertation
Language: Farsi
Document No: 46441 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Masihi, Mohsen
Abstract:
In imbibition process, as one of the main mechanisms of recovery from naturally fractured reservoirs, a wetting fluid enters matrix blocks and produces nonwetting phase from blocks as result of interaction between capillary, gravity and viscous forces. Depending on various characteristics of system different types of imbibition like counter-current spontaneous imbibition, cocurrent spontaneous imbibition and dynamic counter-current imbibition could occur. In order to predict recovery from matrix blocks scaling equations can be used. In this thesis suitable scaling equations are presented for different types of imbibition by using analytical solutions. The studies cases are counter-current spontaneous imbibition (with and without the gravity forces), cocurrent spontaneous imbibition and dynamic counter-current imbibition. To validate the presented scaling equations experimental data originated from both literature and this thesis have been used.
Furthermore using the exact analytical solution to counter-current spontaneous imbibition problem we present the first theoretically based wettability index. This method is also used to present the first universal rock typing index.
Keywords:
Upscaling ; Wetting ; Fractured Reservoirs ; Enhanced Oil Recovery ; Imbibition Process ; Rock Type

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