Relationships between fracture patterns, geodynamics and mechanical stratigraphy in Carbonates (South-East Basin, France)

Lamarche, Juliette; Lavenu, Arthur P. C.; Gauthier, B.; Guglielmi, Yves; Jayet, Océane

doi:10.1016/j.tecto.2012.06.042

Cited by 107 publications

(71 citation statements)

References 37 publications

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“…Especially in the case of carbonates, mechanical properties of rocks change significantly during diagenesis (e.g. Laubach et al 2010;Boro et al, 2013 Lamarche et al 2012) and ii) the geological evolution of the relevant bodies (e.g. folding, episodes of exhumation).…”

Section: Discussionmentioning

confidence: 99%

Predicting Multiscale Fracture Patterns in Buried Reservoirs: the Importance of Outcrop Data in a Coherent Workflow

Bertotti¹,

Hardebol²,

Bisdom³

2013

Proceedings

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SUMMARYFracture data from outcropping analogs are often acquired but rarely used to improve permeability predictions in buried reservoirs. To improve this we present a systematic workflow which includes i) the building of a geometric model of the investigated structure, ii) the execution of mechanical simulations to determine state of stress and strain field, iii) the use of outcrop data to populate the model and iv) develop a reservoir-scale permeability model To make full use of outcrop data, we present new acquisition and processing tools allowing able to provide a full characterization of the fracture field even when fractures are not bed-confined. A few case studies are presented to discuss this workflow in sedimentologically and structurally heterogeneous settings.

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Section: Discussionmentioning

confidence: 99%

Predicting Multiscale Fracture Patterns in Buried Reservoirs: the Importance of Outcrop Data in a Coherent Workflow

Bertotti¹,

Hardebol²,

Bisdom³

2013

Proceedings

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“…The present-day structure results from poly-phase deformation events which sequentially interrupted the sedimentary basin development from Cretaceous to present (see e.g. Lamarche et al 2012). This complex structure forms a vast fractured aquifer reaching 2000 to 3000 meters of thickness, with continuity from inland to the sea (Tassy et al 2014).…”

Section: General Settingmentioning

confidence: 99%

Insights into saline intrusion and freshwater resources in coastal karstic aquifers using a lumped Rainfall–Discharge–Salinity model (the Port-Miou brackish spring, SE France)

Arfib

Charlier²

2016

Journal of Hydrology

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. Insights into saline intrusion and freshwater resources in coastal karstic aquifers using a lumped Rainfall-Discharge-Salinity model (the Port-Miou brackish spring, SE France). Journal of Hydrology, Elsevier, 2016, 540, pp.148-161. 10.1016/j.jhydrol.2016 Accepted Manuscript This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe aim of this study was to develop a conceptual model of saline intrusion within coastal karst aquifers by analyzing rainfall-discharge-salinity data and to assess freshwater resources using a lumped modeling approach. In a first step, we analyzed 4 years of data (rainfall, discharge and salinity times series) of the Port-Miou brackish submarine spring in South France (400 km²). A conceptual model of the aquifer was then designed to differentiate a deep brackish reservoir and a shallower fresh one. Salinity variations at the spring are assumed to be controlled mainly by dilution originating from the fresh water in the shallower reservoir. In a second step, a lumped modeling approach was developed based on the conceptual model to simulate discharge as well as salinity over time. We proposed a reservoir-model to take into account slow and fast components in the shallower part of the aquifer and a saline intrusion in the deeper one. This Rainfall-Discharge-Salinity model was calibrated and validated for two periods of 1.5 years at a daily time step and was also tested to reproduce a multi-annual evolution of the available discharge and salinity time series. Good simulation results were obtained to reproduce water and mass budgets as well as discharge and salinity dynamics 2 during several hydrological cycles. The simultaneous modeling of hydrodynamics and quality data showed the robustness of the model in addition to its easy implementation. Our results led us to propose a new type of seawater mixing mechanism for brackish springs: the dilution type, in addition to the well-known Ventury suction and Head balance types. The application of the lumped model on the Port-Miou brackish spring validated the hydrogeological processes deduced from experimental data, given an initial quantification of the freshwater resources available in such complex brackish karstic aquifers.

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“…These methods do, however, implicitly assume that smallscale well fracture data are hard data that should be honored and that they are implicitly geologically related to large-scale fracture or deformation systems, which is not always the case (Lamarche et al, 2012).…”

Section: A C K N O W L E D G E M E N T Smentioning

confidence: 99%

“…The quarry is located away from the main regional faults, and sedimentary layers show only a gentle northward tilt (average dip direction and dip angle: 350/08). Maximum burial depth and subsequent exhumation are unknown in the Cante Perdrix area, but in the eastern part of the basin 1 km (3280 ft) of exhumation has been estimated (Lamarche et al, 2012). The carbonates exposed in the quarry are homogeneous limestones (mudstones) (Sanchis and Séranne, 2000).…”

Section: Cante Perdrix Quarry Settingmentioning

confidence: 99%

Calibrating discrete fracture-network models with a carbonate three-dimensional outcrop fracture network: Implications for naturally fractured reservoir modeling

Bisdom¹,

Gauthier²,

Bertotti³

et al. 2014

Bulletin

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A B S T R A C TModeling naturally fractured reservoirs requires a detailed understanding of the three-dimensional (3D) fracture-network characteristics, whereas generally only one-dimensional (1D) data, often suffering from sampling artifacts, are available as inputs for modeling. Additional fracture properties can be derived from outcrop analogs with the scanline method, but it does not capture their full two-dimensional (2D) characteristics. We propose an improved workflow based on a 2D field-digitizing tool for mapping and analyzing fracture parameters as well as relations to bedding. From fracture data collected along 11 vertical surface outcrops in a quarry in southeast France, we quantify uncertainties in modeling fracture networks. The fracture-frequency distribution fits a Gaussian distribution that we use to evaluate the intrinsic fracture density variability within the quarry at different observation scales along well-analog scanlines. Excluding well length as a parameter, we find that 30 wells should be needed to fully (i.e., steady variance) capture the natural variability in fracture spacing. This illustrates the challenge in trying to predict fracture spacing in the subsurface from limited well data. Furthermore, for models with varying scanline orientations we find that Terzaghi-based spacing corrections fail when the required correction angle is more than 60°. We apply the 1D well Kevin Bisdom holds a M.Sc. degree in petroleum engineering and geosciences from the Delft University of Technology, Netherlands. He is currently a Ph.D. candidate in the section of applied geology at the Delft University of Technology working on geomechanical and fluid flow modeling of fracture networks in folded subsurface structures using outcrop analogs in central Tunisia. is a senior geologist and geophysicist at Total. He is currently head of the naturally fractured reservoir (NFR) study team and scientific adviser for NFR operational and research and development projects. Bertrand holds a Ph.D. in structural geology from the Pierre and Marie Curie University of Paris and has 25 years of experience in the oil and gas industry with Shell and Total. received his master's degree at the University of Pisa (Italy) and the Ph.D. at the ETH-Zurich with a thesis on the tectonosedimentary evolution of the South-Alpine rifted margin. He was then at the VU Amsterdam studying passive margins and foredeep basins. Since 2010, he has been a professor for applied geology at the Delft University of Technology working mainly on fractured reservoirs.

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Relationships between fracture patterns, geodynamics and mechanical stratigraphy in Carbonates (South-East Basin, France)

Cited by 107 publications

References 37 publications

Predicting Multiscale Fracture Patterns in Buried Reservoirs: the Importance of Outcrop Data in a Coherent Workflow

Predicting Multiscale Fracture Patterns in Buried Reservoirs: the Importance of Outcrop Data in a Coherent Workflow

Insights into saline intrusion and freshwater resources in coastal karstic aquifers using a lumped Rainfall–Discharge–Salinity model (the Port-Miou brackish spring, SE France)

Calibrating discrete fracture-network models with a carbonate three-dimensional outcrop fracture network: Implications for naturally fractured reservoir modeling

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