Migration of Fluids in Sedimentary Basins

Neglia, S.

doi:10.1306/2f918194-16ce-11d7-8645000102c1865d

Cited by 30 publications

(7 citation statements)

References 37 publications

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“…S data (dark‐gray area) are for siltstones (Reece et al., 2012). The continuous line (Equation ) fits our data and agrees with measured mudrock permeabilities indicated by the MN gray‐shaded area (Magara, 1978; Neglia, 1979). Such a line also represents an upper bound for the permeability of HM rocks.…”

Section: Discussionsupporting

confidence: 83%

“…(1) which fits the porosity-permeability relationship of unconsolidated sediments and is a lower bound for the permeability of mudrocks similar to our samples (Magara, 1978;Neglia, 1979;Reece et al, 2012). On the other hand, we found that:…”

Section: Discussionsupporting

confidence: 82%

“…Neuzil (1994, 2019) compiled data from several studies on unconsolidated clays with a maximum porosity of 80%, and consolidated mudrocks with porosities <35%. Saffer and Bekins (1998) followed Neuzil's work and described the permeability ( κ ) of the Nankai accretionary complex as:

\kappa (nD)\approx {10}^{1+5.5\phi }

which fits the porosity‐permeability relationship of unconsolidated sediments and is a lower bound for the permeability of mudrocks similar to our samples (Magara, 1978; Neglia, 1979; Reece et al., 2012). On the other hand, we found that:

\kappa (nD)\approx {10}^{-1.2+44\phi }

fits our results and is an upper bound for the permeability of mudrocks.…”

Section: Discussionsupporting

confidence: 82%

See 2 more Smart Citations

Permeability and Elastic Properties of Rocks From the Northern Hikurangi Margin: Implications for Slow‐Slip Events

Tisato,

Bland,

Van Avendonk

et al. 2024

Geophysical Research Letters

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Fluid flow and pore‐pressure cycling are believed to control slow slip events (SSEs), such as those that frequently occur at the northern Hikurangi margin of New Zealand. To better understand fluid flow in the forearc system we examined the relationship between several physical properties of Cretaceous‐to‐Pliocene sedimentary rocks from the Raukumara peninsula. We found that the permeability of the deep wedge is too low to drain fluids, but fracturing increases permeability by orders of magnitude, making fracturing key for fluid flow. In weeks to months, plastic deformation, swelling, and possibly not‐yet‐identified mechanisms heal the fractures, restoring the initial permeability. We conclude that overpressures at the northern HM might partly dissipate during SSEs due to enhanced permeability near faults. However, in the months following an SSE, healing in the prism will lower permeability, forcing pore pressure to rise and a new SSE to occur.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 82%

\kappa (nD)\approx {10}^{1+5.5\phi }

\kappa (nD)\approx {10}^{-1.2+44\phi }

fits our results and is an upper bound for the permeability of mudrocks.…”

Section: Discussionsupporting

confidence: 82%

See 1 more Smart Citation

Permeability and Elastic Properties of Rocks From the Northern Hikurangi Margin: Implications for Slow‐Slip Events

Tisato,

Bland,

Van Avendonk

et al. 2024

Geophysical Research Letters

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show abstract

“…S data (dark-gray area) are for siltstones (Reece et al, 2012). The continuous line fits our data and agrees with measured mudstone permeabilities indicated by the MN gray-shaded area (Magara, 1978;Neglia, 1979). Such a line also represents an upper bound for the permeability of HM rocks.…”

Section: Discussionsupporting

confidence: 83%

“…Saffer & Bekins (1998) followed Neuzil's work and described the permeability (κ) of the Nankai accretionary complex as: κ (nD) ≈10 1+5.5φ eq. 1 Equation 1 fits the porosity-permeability relationship of unconsolidated sediments and is a lower bound for the permeability of mudstones that are similar to our samples (Magara, 1978;Neglia, 1979;Reece et al, 2012). On the other hand, we found that: κ (nD) ≈10 −1.3+45φ eq.…”

Section: Discussionsupporting

confidence: 68%

Permeability and elastic properties of rocks from the northern Hikurangi margin: Implications for slow-slip events

Tisato¹,

Bland²,

Avendonk³

et al. 2023

Preprint

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Fluid flow and pore-pressure cycling are often invoked as controls to slow slip events (SSEs), such as those that frequently occur at the northern Hikurangi margin (HM) of New Zealand. To better understand fluid flow in the forearc system, we examined the relationship between elastic properties, compaction, porosity, and permeability of Cretaceous to Pliocene mudstones from the Raukumara peninsula. We found that the permeability of the deep wedge is too low to drain fluids, but fracturing increases permeability by orders of magnitude, making fracturing key for fluid flow. In weeks to months, plastic deformation and clay swelling heal the fractures restoring the initial permeability. We conclude that overpressures at the northern HM might partly dissipate during SSEs due to enhanced permeability near faults. However, in the weeks to months following an SSE, healing in the prism will lower permeability, forcing pore pressure to rise and a new SSE to occur. PAPER SUBMITTED TO GEOPHYSICAL RESEARCH LETTERS - AGU

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2015

Fluid Dynamics of Oil and Gas Reservoirs

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Migration of Fluids in Sedimentary Basins

Cited by 30 publications

References 37 publications

Permeability and Elastic Properties of Rocks From the Northern Hikurangi Margin: Implications for Slow‐Slip Events

Permeability and Elastic Properties of Rocks From the Northern Hikurangi Margin: Implications for Slow‐Slip Events

Permeability and elastic properties of rocks from the northern Hikurangi margin: Implications for slow-slip events

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