Productivity evaluation of hydraulically fractured gas-condensate reservoirs

Shi Y. Zheng, Murat Zhiyenkulov, TongChun C. Yi

    Research output: Contribution to journalArticle

    Abstract

    This study describes an application of a compositional single well simulator to analyse well tests in gas-condensate reservoirs. An important aspect of this application for gas-condensate well tests is accurate fluid property prediction during the multi-phase flow regime, which occurs in the near-well region. The simulator can also be used to understand the impact of liquid drop-out and fracture flow on well productivity. Hydraulic fracturing improves the economics of wells drilled in tight reservoirs. However, the operation involves a significant amount of expenditure. In recent years this technique has also been used to stimulate gas-condensate reservoirs by creating a flow conduit through the condensate banking near the well. Thus, it is crucial to keep a fracture as small as possible. In practice it has been proved that a short, wide fracture can provide much higher production than the traditionally pursued narrow, long fracture. The workflow in this study contains compositional simulation of a single well in a tight gas-condensate reservoir, which is used to generate transient pressure data for well test analysis and interpretation to predict multi-phase flow behaviour, and to analyse productivity impairment due to condensation. Simulation models were then further modified to study the impact of various hydraulic fractures on the well productivity index (PI),which is defined as the ratio of production rate (constant) divided by the pressure drop across the reservoir. PIs for fractured cases are compared with respect to the non-fractured base case. Streamline simulation of the fractured gas-condensate reservoir was also included in the study to allow visualization of the flow profile in and around the hydraulic fracture. © 2006 EAGE/Geological Society of London.

    Original languageEnglish
    Pages (from-to)275-283
    Number of pages9
    JournalPetroleum Geoscience
    Volume12
    Issue number3
    DOIs
    Publication statusPublished - Aug 2006

    Fingerprint

    Gas condensates
    Productivity
    Multiphase flow
    Simulators
    Hydraulics
    Confined flow
    Hydraulic fracturing
    Pressure drop
    Condensation
    Rate constants
    Visualization
    Economics
    Fluids
    Liquids

    Keywords

    • Compositional model
    • Condensate banking
    • Hydraulic fracturing
    • Multi-phase flow
    • Pseudo pressure

    Cite this

    Zheng, Shi Y. ; Zhiyenkulov, Murat ; Yi, TongChun C. / Productivity evaluation of hydraulically fractured gas-condensate reservoirs. In: Petroleum Geoscience. 2006 ; Vol. 12, No. 3. pp. 275-283.
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    Productivity evaluation of hydraulically fractured gas-condensate reservoirs. / Zheng, Shi Y.; Zhiyenkulov, Murat; Yi, TongChun C.

    In: Petroleum Geoscience, Vol. 12, No. 3, 08.2006, p. 275-283.

    Research output: Contribution to journalArticle

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