Hydraulic characterization and upscaling of fracture networks based on multiple-scale well test data

Auli Niemi, Kimmo Kontio, Auli Kuusela-Lahtinen, Antti Poteri

    Research output: Contribution to journalArticleScientificpeer-review

    40 Citations (Scopus)

    Abstract

    Hydraulic properties and upscaling characteristics of low‐permeability fractured rock are analyzed based on systematic well test data from three different measurement scales. First, tests are simulated in a large number of geological fracture network realizations, and the acceptable fracture transmissivity distribution parameters that produce the observed statistics of the two smallest measurement scales, i.e., 2‐m and 10‐m scales, are defined. Instead of a single value, a range of acceptable parameter values can be found to produce the observed result. Second, upscaling simulations are carried out with the calibrated networks. These indicate that the investigated system cannot be properly modeled by means of a continuum tensor presentation but would better be represented by means of “equivalent fracture” statistics. Third, the conductive characteristics of the calibrated 30‐m network blocks are compared to well test results from the same scale. The results from this preliminary analysis indicate that one‐dimensional borehole observations interpreted with standard continuum‐based methods may considerably underestimate the three‐dimensional conductive characteristics of heterogeneous, noncontinuum fractured media.

    Original languageEnglish
    Pages (from-to)3481-3497
    Number of pages17
    JournalWater Resources Research
    Volume36
    Issue number12
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    upscaling
    fracture network
    hydraulics
    well
    fractured medium
    transmissivity
    hydraulic property
    borehole
    rock
    simulation
    test
    parameter
    statistics

    Cite this

    Niemi, Auli ; Kontio, Kimmo ; Kuusela-Lahtinen, Auli ; Poteri, Antti. / Hydraulic characterization and upscaling of fracture networks based on multiple-scale well test data. In: Water Resources Research. 2000 ; Vol. 36, No. 12. pp. 3481-3497.
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    title = "Hydraulic characterization and upscaling of fracture networks based on multiple-scale well test data",
    abstract = "Hydraulic properties and upscaling characteristics of low‐permeability fractured rock are analyzed based on systematic well test data from three different measurement scales. First, tests are simulated in a large number of geological fracture network realizations, and the acceptable fracture transmissivity distribution parameters that produce the observed statistics of the two smallest measurement scales, i.e., 2‐m and 10‐m scales, are defined. Instead of a single value, a range of acceptable parameter values can be found to produce the observed result. Second, upscaling simulations are carried out with the calibrated networks. These indicate that the investigated system cannot be properly modeled by means of a continuum tensor presentation but would better be represented by means of “equivalent fracture” statistics. Third, the conductive characteristics of the calibrated 30‐m network blocks are compared to well test results from the same scale. The results from this preliminary analysis indicate that one‐dimensional borehole observations interpreted with standard continuum‐based methods may considerably underestimate the three‐dimensional conductive characteristics of heterogeneous, noncontinuum fractured media.",
    author = "Auli Niemi and Kimmo Kontio and Auli Kuusela-Lahtinen and Antti Poteri",
    year = "2000",
    doi = "10.1029/2000WR900205",
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    Hydraulic characterization and upscaling of fracture networks based on multiple-scale well test data. / Niemi, Auli; Kontio, Kimmo; Kuusela-Lahtinen, Auli; Poteri, Antti.

    In: Water Resources Research, Vol. 36, No. 12, 2000, p. 3481-3497.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Hydraulic characterization and upscaling of fracture networks based on multiple-scale well test data

    AU - Niemi, Auli

    AU - Kontio, Kimmo

    AU - Kuusela-Lahtinen, Auli

    AU - Poteri, Antti

    PY - 2000

    Y1 - 2000

    N2 - Hydraulic properties and upscaling characteristics of low‐permeability fractured rock are analyzed based on systematic well test data from three different measurement scales. First, tests are simulated in a large number of geological fracture network realizations, and the acceptable fracture transmissivity distribution parameters that produce the observed statistics of the two smallest measurement scales, i.e., 2‐m and 10‐m scales, are defined. Instead of a single value, a range of acceptable parameter values can be found to produce the observed result. Second, upscaling simulations are carried out with the calibrated networks. These indicate that the investigated system cannot be properly modeled by means of a continuum tensor presentation but would better be represented by means of “equivalent fracture” statistics. Third, the conductive characteristics of the calibrated 30‐m network blocks are compared to well test results from the same scale. The results from this preliminary analysis indicate that one‐dimensional borehole observations interpreted with standard continuum‐based methods may considerably underestimate the three‐dimensional conductive characteristics of heterogeneous, noncontinuum fractured media.

    AB - Hydraulic properties and upscaling characteristics of low‐permeability fractured rock are analyzed based on systematic well test data from three different measurement scales. First, tests are simulated in a large number of geological fracture network realizations, and the acceptable fracture transmissivity distribution parameters that produce the observed statistics of the two smallest measurement scales, i.e., 2‐m and 10‐m scales, are defined. Instead of a single value, a range of acceptable parameter values can be found to produce the observed result. Second, upscaling simulations are carried out with the calibrated networks. These indicate that the investigated system cannot be properly modeled by means of a continuum tensor presentation but would better be represented by means of “equivalent fracture” statistics. Third, the conductive characteristics of the calibrated 30‐m network blocks are compared to well test results from the same scale. The results from this preliminary analysis indicate that one‐dimensional borehole observations interpreted with standard continuum‐based methods may considerably underestimate the three‐dimensional conductive characteristics of heterogeneous, noncontinuum fractured media.

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