Strain and Flow Pathways in a Shale Fault Zone: An In-Situ Test of Fault Seal Integrity

Henry, Pierre; Guglielmi, Yves; Gout, C.; Castilla, Raymi; Dick, Pierre; Donzé, Frédéric‐Victor; Tsopela, Alexandra; Neyens, Denis; Barros, Louis De; Durand, J.

doi:10.3997/2214-4609.201902318

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, faults could be vertical pathways but horizontal seals for fluid circulation due to permeability anisotropy (Caine et al., 1996; Evans et al., 1997; Wibberley et al., 2008). Indeed, different authors noted in several regions around the world that faults may be sealing in the perpendicular direction but transmissive along the fault direction and that their permeability may vary depending on external parameters such as pore pressure, deformation style and the lithologies put in contact through the fault and within the fault itself (P. Henry et al., 2019; Morley et al., 2017; Wibberley et al., 2017). This feature was also already highlighted over the SCB and particularly in the Absheron anticline where gas was found in the northern flank while no economic gas accumulation was encountered in the southern flank (Gautherot et al., 2015; Grosjean et al., 2009; Javanshir et al., 2015).…”

Section: Resultsmentioning

confidence: 99%

“…Lateral compartmentalization of the 2D model through the presence of faults having low horizontal permeability (Gautherot et al., 2015; Javanshir et al., 2015) was necessary to generate overpressure at the location of the AMV (Figure 5). Faults are commonly regarded as presenting permeability anisotropy, with the higher permeability along the fault surface (Caine et al., 1996; Deville et al., 2010; Evans et al., 1997; P. Henry et al., 2019; Morley et al., 2017; Schneider et al., 2004; Wibberley et al., 2008). Therefore methane‐saturated water migration pathways from the Maykop Fm.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution Model for the Absheron Mud Volcano: From Stratified Sediments to Fluid Mud Generation

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evolution Model for the Absheron Mud Volcano: From Stratified Sediments to Fluid Mud Generation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Lateral compartmentalization of the 2D model through the presence of faults having low horizontal permeability (Gautherot et al, 2015;Javanshir et al, 2015) was necessary to generate overpressure at the location of the AMV (Figure 5). Faults are commonly regarded as presenting permeability anisotropy, with the higher permeability along the fault surface (Caine et al, 1996;Deville et al, 2010;Evans et al, 1997;P. Henry et al, 2019;Morley et al, 2017;Schneider et al, 2004;Wibberley et al, 2008).…”

Section: Synthesis Of the Main Resultsmentioning

confidence: 99%

Evolution model for the Absheron Mud Volcano: from stratified sediments to fluid mud generation

Blouin

Sultan

Pierron

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Modeling deep control pulsing ﬂux of native H2 throughout tectonic fault-valve systems

Donzé

Bourdet

Truche

et al. 2022

Preprint

View full text Add to dashboard Cite

Pulsing seepages of native hydrogen (H2) have been observed at the surface on several emitting structures. It is still unclear whether this H2 pulsed flux is controlled by deep migration processes, atmosphere/near-surface interactions or by bacterial fermentation. Here, we investigate mechanisms that may trigger pulsating fluid migration at depth and the resulting periodicity. We set up a numerical model to simulate the migration of a deep constant fluid flow. To verify the model's formulation to solve complex fluid flows, we first simulate the morphology and amplitude of 2D thermal anomalies induced by buoyancy-driven water flow within a fault zone. Then, we simulate the H2 gas flow along a 1-km draining fault, crosscut by a lower permeable rock layer to investigate the conditions for which a pulsing system is generated from a deep control. For a constant incoming flow of H2 at depth, persistent bursts at the surface only appear in the model if: (I) a permeability with an effective-stress dependency is used, (II) a strong contrast of permeability exists between the different zones, (III) a sufficiently high value of the initial effective stress state at the base of the low permeable layer exists, and (IV) the incoming and continuous fluid flow of H2 at depth remains low enough so that the overpressure does not "open" instantly the low permeability layer. The typical periodicity expected for this type of valve-fault control of H2 pulses at the surface is at a time scale of the order of 100 to 300 days. Hosted fileessoar.10512945.1.docx available at https://authorea.com/users/527803/articles/611174modeling-deep-control-pulsing-%EF%AC%82ux-of-native-h2-throughout-tectonic-fault-valvesystems Modeling deep control pulsing flux of native H 2 throughout tectonic fault-valve systems

show abstract

Strain and Flow Pathways in a Shale Fault Zone: An In-Situ Test of Fault Seal Integrity

Cited by 3 publications

References 10 publications

Evolution Model for the Absheron Mud Volcano: From Stratified Sediments to Fluid Mud Generation

Evolution Model for the Absheron Mud Volcano: From Stratified Sediments to Fluid Mud Generation

Evolution model for the Absheron Mud Volcano: from stratified sediments to fluid mud generation

Modeling deep control pulsing ﬂux of native H2 throughout tectonic fault-valve systems

Contact Info

Product

Resources

About