Sedimentological, Petrophysical, and Seismic Characterization of an Upper Jurassic Shoreface-Dominated Shelf Margin (the Boulonnais, Northern France)

Braaksma, H.; Proust, Jean‐Noël; Kenter, J.A.M.; Drijkoningen, G.G.; Filippidou, N.

doi:10.2110/jsr.2006.11

Cited by 21 publications

(15 citation statements)

References 72 publications

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“…1). Extensive studies of the Boulonnais sections have provided a depositional and sequence stratigraphical framework that may be used to help interpret variations in OM content and composition, in response to fluctuating relative sea-level (e.g., Al-Ramadan et al, 2005;El Albani et al, 1993;Bialkowski et al, 2000;Braaksma et al, 2006;Herbin et al, 1995;Proust et al, 1995;Schlirf, 2003;Tribovillard et al, 2001;Wignall and Newton, 2001;Williams et al, 2001). The most-studied section is exposed at the Cap de la Crèche, between Wimereux and Boulogne-sur-mer (Fig.…”

Section: Geological Framework and Previous Resultsmentioning

confidence: 99%

“…Sequence stratigraphical studies of the Wimereux section (Al-Ramadan et al, 2005;Braaksma et al, 2006;Herbin et al, 1995;Proust, 1994, 1995 allow us to relate observed variations in organic facies to changes in relative sealevel. Herbin et al (1995) pointed out that relative sea-level rise was not the single cause for OM accumulation.…”

Section: Geological Framework and Previous Resultsmentioning

confidence: 99%

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Small-scaled lateral variations of an organic-rich formation in a ramp-type depositional environment (the Late Jurassic of the Boulonnais, France): impact of the clastic supply

Hatem¹,

Tribovillard²,

Averbuch³

et al. 2017

Bull. Soc. géol. Fr.

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-We studied a potential petroleum source rock deposited in a clastic-dominated ramp environment: the Argiles de Châtillon Formation (Kimmeridgian-Tithonian, Boulonnais area, northern France). The formation was deposited along a proximal-distal gradient on this ramp affected by synsedimentary fault movements. A sedimentological, mineralogical and geochemical study was conducted to decipher the distribution patterns of sedimentary parameters along such a depth increase over the ramp. It comes out that smectite distribution unexpectedly mimics the lateral depth evolution despite the good floatability of the mineral. It is also observed that the Argiles de Châtillon could accumulate noticeable amounts of organic matter in spite of paleoenvironmental conditions that were not specifically prone to organic matter preservation and burial (sedimentation rate, mineral particle grain size, productivity, oxygenation level...). Conversely, reactive iron, when being present in limited abundance, must have allowed sulfide ions to react with organic molecules instead of forming iron sulfides, which fostered organic matter preservation and accumulation. This protecting role of organic sulfide incorporation (additional to other favorable factors) cannot exist if reactive iron is relatively abundant. Lastly, our results (still fragmentary) suggest that smectite minerals could carry reactive iron, which would have occasionally hampered organic-matter preservation.Keywords: Kimmeridgian-Tithonian / Boulonnais / organic matter / petroleum source rocks / geochemistry / clay minerals Résumé -Importance des variations latérales discrètes dans les apports détritiques, observées dans des faciès de rampe sédimentaire riches en matière organique (Jurassique supérieur du Boulonnais). La formation des Argiles de Châtillon (Kimméridgien-Tithonien, Boulonnais) est un bon analogue géologique de roche mère pétrolière déposée en contexte de rampe clastique. Ces dépôts se sont mis en place le long d'un transect proximal-distal sur une rampe affectée par des mouvements tectoniques synsédimentaires. Pour mettre en évidence et comprendre la distribution des paramètres sédimentaires en fonction de l'évolution de la profondeur, une étude sédimentologique, minéralogique et géochimique fut entreprise. Il en ressort que la distribution de la smectite au sein du cortège argileux respecte ce gradient, malgré la flottabilité reconnue de ce minéral. Il apparaît également que les Argiles de Châtillon ont pu accumuler des quantités sensibles de matière organique malgré un contexte de dépôt peu favorable à la préservation et à l'enfouissement de celle-ci. En revanche, le fer réactif, quand il était présent en faible quantité dans les sédiments, a pu permettre aux ions sulfures de réagir avec les molécules organiques, plutôt que de former des sulfures de fer. Cette sulfuration a pu accroître la résistance de la matière organique à la dégradation microbienne, ce qui explique la bonne préservation du carbone organique. Ce rôle protecteur de la vulcanisation...

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Section: Geological Framework and Previous Resultsmentioning

confidence: 99%

Section: Geological Framework and Previous Resultsmentioning

confidence: 99%

Small-scaled lateral variations of an organic-rich formation in a ramp-type depositional environment (the Late Jurassic of the Boulonnais, France): impact of the clastic supply

Hatem¹,

Tribovillard²,

Averbuch³

et al. 2017

Bull. Soc. géol. Fr.

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“…They found that observed variations in sonic velocity were related to pore type (mouldic, vuggy, fractures) and to the carbonate-siliciclastic ratio. Braaksma et al (2003Braaksma et al ( , 2006) studied a Jurassic ramp system (Boulonnais, northern France) including coastal plain sand-and mudstones, shallow-marine sandstones and shelf mudstones, and found that the acoustic properties of the sediments were mainly controlled by porosity and to a lesser extent by carbonate or clay content. Zeller et al (2015aZeller et al ( , 2015b distinguished three lithological groups (carbonates, sandstones and shales) in a mixed shelf succession in the Neuquén Basin (Argentina).…”

Section: Comparison With Other Mixed Carbonate and Non-carbonate Depomentioning

confidence: 99%

Variations in Petrophysical Properties of Upper Palaeozoic Mixed Carbonate and Non‐carbonate Deposits, Spitsbergen, Svalbard Archipelago

Jafarian

Kleipool

Scheibner

et al. 2016

Journal of Petroleum Geology

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The Late Carboniferous – Early Permian Gipsdalen Group and the Early to Late Permian Templefjorden Group are known hydrocarbon plays in the Arctic region, e.g. on the Finnmark Platform, Loppa High and Sverdrup Basin. Time‐equivalent deposits crop out on the island of Spitsbergen and consist of mixed carbonate and non‐carbonate (primarily siliciclastic, siliceous, organic‐carbon rich and clayey) sediments deposited in continental to deep‐marine settings. In rock samples (n = 73) collected from five outcrop locations on Spitsbergen, thin‐section analysis showed the presence of ten microfacies types ranging from claystones and spiculitic cherts to rudstones and dolostones. Petrophysical and textural properties of the samples were measured to evaluate the link with the acoustic (P‐ and S‐wave) velocities of these generally tight rocks, which have an average porosity of about 2%. Variations in acoustic velocity measurements primarily depend on variations in mineralogical composition (silica versus carbonate) and, to a lesser extent, on variations in porosity and bulk density. Pore networks in the sediments are dominated by microporosity and (micro)cracks, followed by interparticle porosity. Recrystallization effects and pore shape variations show a lesser effect on the P‐wave velocity. Clay content does not exceed 12.7% and also has a secondary impact on the acoustic velocities. Defining which textural and physical parameters control the acoustic properties of these carbonate and non‐carbonate sedimentary rocks will help with the interpretation of the seismic response of equivalent deposits in the subsurface.

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“…Reflection seismic methods often encounter difficulties when attempting to image carbonate reservoirs. Suggested reasons behind this are the absence of distinct layering during the deposition and diagenetic alterations of the carbonate sediments (Masaferro et al, 2003;Braaksma et al, 2006;Von Hartmann et al, 2012), abrupt impedance and velocity changes (Rudolph et al, 1989;Janson et al, 2007), and more generally, high structural complexity (Phipps 1989;Rudolph et al, 1989;Erlich et al, 1990;Kenter et al, 2001). This was an important issue during velocity analysis.…”

Section: J Alcalde Et Al: 3-d Reflection Seismic Imagingmentioning

confidence: 99%

3-D reflection seismic imaging of the Hontomín structure in the Basque–Cantabrian Basin (Spain)

et al. 2013

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Abstract. The Basque-Cantabrian Basin of the northern Iberia Peninsula constitutes a unique example of a major deformation system, featuring a dome structure developed by extensional tectonics followed by compressional reactivation. The occurrence of natural resources in the area and the possibility of establishing a geological storage site for carbon dioxide motivated the acquisition of a 3-D seismic reflection survey in 2010, centered on the Jurassic Hontomín dome. The objectives of this survey were to obtain a geological model of the overall structure and to establish a baseline model for a possible geological CO 2 storage site. The 36 km 2 survey included approximately 5000 mixed (Vibroseis and explosives) source points recorded with a 25 m inline source and receiver spacing. The target reservoir is a saline aquifer, at approximately 1450 m depth, encased and sealed by carbonate formations. Acquisition and processing parameters were influenced by the rough topography and relatively complex geology. A strong near-surface velocity inversion is evident in the data, affecting the quality of the data. The resulting 3-D image provides constraints on the key features of the geologic model. The Hontomín structure is interpreted to consist of an approximately 10 7 m 2 large elongated dome with two major (W-E and NW-SE) striking faults bounding it. Preliminary capacity estimates indicate that about 1.2 Gt of CO 2 can be stored in the target reservoir.

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Sedimentological, Petrophysical, and Seismic Characterization of an Upper Jurassic Shoreface-Dominated Shelf Margin (the Boulonnais, Northern France)

Cited by 21 publications

References 72 publications

Small-scaled lateral variations of an organic-rich formation in a ramp-type depositional environment (the Late Jurassic of the Boulonnais, France): impact of the clastic supply

Small-scaled lateral variations of an organic-rich formation in a ramp-type depositional environment (the Late Jurassic of the Boulonnais, France): impact of the clastic supply

Variations in Petrophysical Properties of Upper Palaeozoic Mixed Carbonate and Non‐carbonate Deposits, Spitsbergen, Svalbard Archipelago

3-D reflection seismic imaging of the Hontomín structure in the Basque–Cantabrian Basin (Spain)

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