Perforation cavity stability: Comprehensive laboratory experiments and numerical analysis

Johan Tronvoll, Nobuo Morita, F. J. Santarelli

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    36 Citations (Scopus)

    Abstract

    The paper describes comprehensive laboratory and numerical studies of perforation cavity stability and sand production from a perforation tunnel. Jacketed cores with a cavity simulating a perforation tunnel were loaded in a high-pressure vessel and fluid flow was applied. The cavity deformation and failure were monitored by a cantilever deformation gauge, while produced sand was monitored acoustically and volumetrically at the outlet of the cavity. A cavity stability analysis was conducted using a 3D non-linear finite element model. The numerical analysis shows that the onset of limited sand production matches the initiation of shear failure at the cavity wall. However, the perforation cavity is still relatively stable in the sense that it does not collapse. The sand production increases with the expansion of the post-failure zone, and the cavity finally collapses if excessive confining load is applied to the sample. The post-failure mechanisms are critical with respect to cavity collapse and sand production problems, which may explain the discrepancy between experimental and analytical results.

    Original languageEnglish
    Title of host publicationProceedings - SPE Annual Technical Conference and Exhibition
    Place of PublicationRichardson, TX, United States
    PublisherPubl by Soc of Petroleum Engineers of AIME
    Pages339-349
    Number of pages11
    VolumePi
    Publication statusPublished - 1992
    EventProceedings of the 1992 SPE Annual Technical Conference and Exhibition - Washington, DC, USA
    Duration: 1992 Oct 41992 Oct 7

    Other

    OtherProceedings of the 1992 SPE Annual Technical Conference and Exhibition
    CityWashington, DC, USA
    Period92/10/492/10/7

    ASJC Scopus subject areas

    • Geology
    • Geotechnical Engineering and Engineering Geology

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