Predicting reservoir fluid phase and volumetric behavior from samples contaminated with oil-based mud

Fathollah Gozalpour, Ali Danesh, Dabir H. Tehrani, Adrian C. Todd, Bahman Tohidi

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    The impact of sample contamination with oil-based mud filtrate on phase behavior and properties of different types of reservoir fluids, including gas condensate and volatile oil, has been investigated. Two simple methods are used to determine the uncontaminated fluid composition from contaminated samples. The capability of the methods is demonstrated against highly contaminated samples. An equation-of-state (EOS)-based method also has been developed to predict the phase and volumetric properties of the retrieved composition. The method determines the required parameters of the EOS for the uncontaminated fluid using the developed phase-behavior models from contaminated-sample data. The method has been examined against experimental data of different types of reservoir fluids with successful results.

    Original languageEnglish
    Pages (from-to)197-205
    Number of pages9
    JournalSPE Reservoir Evaluation and Engineering
    Volume5
    Issue number3
    Publication statusPublished - 2002

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