Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis

Kenta Yamada, Kenji Furui

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

    Abstract

    Many casing failure incidents have been reported in oil and gas fields around the world. These casing failure events can occur not only within reservoirs but also in surrounding formations. Engineers must evaluate risks of casing failure when drilling and completing wells especially in highly compacting reservoirs. However, one of the challenges encountered during the evaluation of casing failure risks is that field-scale stress changes and displacements as a result of drilling wells and producing hydrocarbon from reservoirs must be properly taken into account for casing stability analysis. The objective of this study is to develop an efficient integration method for large-scale reservoir compaction and small-scale casing stability analyses for the evaluation of casing deformation and failure. The numerical model developed in this work is based on 3D elasto-plastic finite element method (FEM). Reservoir compaction and subsidence are analyzed using a large-scale FEM model considering details of geological settings while casing stability is analyzed separately by a small-scale FEM model. The two FEM models are integrated by interpolating displacements calculated by the large-scale model and assigning resultant displacements for boundaries of the small-scale casing stability analysis model. The validation of the proposed integration method is also presented in the paper. Our study results indicate that the integration method presented in this paper significantly improves computational efficiencies on an order of 5 times faster than the conventional simulation method that requires a large number of finite elements for reservoir, surrounding formations, cement, and casing. Also it is demonstrated that the integrated model can be applied to inclined wells completed in highly heterogeneous formations at sufficient accuracy. The field case study also indicates that the risk of casing deformation highly depends on its inclination and the position relative to the compacting formation. The small and large scale coupling method developed in this work helps engineers evaluate casing deformation and failure in various locations in reservoir and surrounding formations in an efficient manner and also develop safe and efficient drilling and completion programs to reduce risk of casing mechanical problems.

    Original languageEnglish
    Title of host publicationSociety of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018
    PublisherSociety of Petroleum Engineers
    ISBN (Electronic)9781613995952
    Publication statusPublished - 2018 Jan 1
    EventSPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018 - Brisbane, Australia
    Duration: 2018 Oct 232018 Oct 25

    Other

    OtherSPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018
    CountryAustralia
    CityBrisbane
    Period18/10/2318/10/25

    Fingerprint

    failure analysis
    Failure analysis
    compaction
    Compaction
    finite element method
    Finite element method
    Drilling
    drilling
    well
    stability analysis
    Engineers
    Subsidence
    Convergence of numerical methods
    Hydrocarbons
    Computational efficiency
    stress change
    method
    Numerical models
    gas field
    Cements

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geotechnical Engineering and Engineering Geology
    • Fuel Technology

    Cite this

    Yamada, K., & Furui, K. (2018). Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis. In Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018 Society of Petroleum Engineers.

    Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis. / Yamada, Kenta; Furui, Kenji.

    Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018. Society of Petroleum Engineers, 2018.

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

    Yamada, K & Furui, K 2018, Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis. in Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018. Society of Petroleum Engineers, SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018, Brisbane, Australia, 18/10/23.
    Yamada K, Furui K. Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis. In Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018. Society of Petroleum Engineers. 2018
    Yamada, Kenta ; Furui, Kenji. / Efficient integration method of large-scale reservoir compaction and small-scale casing stability models for oilfield casing failure analysis. Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2018, APOGCE 2018. Society of Petroleum Engineers, 2018.
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