Carbonate Cementation—Key to Reservoir Properties of Four Sandstone Levels (Cretaceous) in the Hibernia Oilfield, Jeanne D'Arc Basin, Newfoundland, Canada

Hesse, Reinhard; Abid, Iftikhar A.

doi:10.1002/9781444304893.ch16

Cited by 15 publications

(17 citation statements)

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“…A karbonát cement forrása nagy valószínűséggel részben az áthal -mo zott törme lékes karbonátszemcsék (kőzettörmelék, bioklaszt) oldó dása és kiválása (azaz átrendeződése) lehetett. A kalcit cement kiválásához társuló geokémiai környezet a törme lékes kvarcszemcsék oldódásának kedvez (HESSE & ABID 1998, MORAD 1998, ezért ehhez a folyamathoz kapcsoljuk a petrográfiai leírásban részletezett első kvarckorróziót (I. tábla, f-h).…”

Section: Diagenezis-történeti éRtékelésunclassified

Az Endrődi Formáció kőzettani és palinológiai vizsgálata a Hódmezővásárhely–I fúrásban (Makói-árok) — őskörnyezeti és diagenezis-történeti értékelés

Varga¹,

Baranyi

Raucsik³

et al. 2017

Földt. Közl.

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This paper presents the results of a mineralogical, petrographic and palynological study of selected Pannonian calcareous marl and sandstone samples penetrated by the Hódmezővásárhely-I (Hód-I) well, Endrőd Formation (Tótkomlós Member, cores 35 and 40, 5167.0-5183.0 m and 5468.0-5486.0 m, respectively); this formation is part of the Makó Trough of the Pannonian Basin, SE Hungary. The studied sections comprise mixed carbonate-siliciclastic rocks with abundant silt-to sand-sized angular grains such as monocrystalline and polycrystalline quartz, muscovite, biotite, chlorite, carbonate and metamorphic rock fragments. This polymictic and immature clast composition reflects the importance of local provenance, suggesting that intrabasinal structural highs represent additional source areas to the basin. Palynological analysis was carried out on selected core segments of the well in order to provide a biostratigraphic framework and palaeoenvironmental interpretation for the studied interval. In the investigated samples two biozones were distinguished: the Spiniferites bentorii oblongus Zone and the Spiniferites paradoxus Zone. The successive changes of the dinocyst assemblages reflect changes in the distance from the shoreline or the terrestrial input from the margin of the Makó Trough. The older assemblage indicates a more proximal setting in relation to the shoreline and/or a higher terrestrial input; the younger dinocyst assemblage -with a more open-water taxa point in relation to a greater distance from the shoreline -represents an increase in the water level, and/or decreased terrestrial input. The predominance of membranous dinocysts in this assemblage indicates a fluctuation in the lake surface salinity, or possibly a shift to a holoplanktonic lifestyle due to periodical oxygen depletion in the water column. The assemblages of both zones demonstrate their regional distribution throughout the whole Pannonian Basin and therefore they can be used to document regional scale trends in phytoplankton communities, as well as implying the communication of water bodies. The colour and preservation of the palynomorphs suggests significant burial heating and the high maturity of the sedimentary organic matter. In the studied samples a series of paragenetic events have been identified using petrographic methods. Early diagenesis was generally represented by cementation (i.e. of framboidal pyrite and carbonates with variable iron content) and weak mechanical compaction. On the other hand, late diagenesis involved pressure solution (chemical compaction), cementation (late pyrite) and, occasionally, dolomite replacement and mineral transformation (smectite to illite) processes. It is noteworthy that in these two core sections neither significant macroporosity nor microporosity were observed, this being due to pervasive cementation.Keywords: Pannonian, endemic, dinocysts, Spiniferites, diagenesis, paragenetic sequence ÖsszefoglalásMunkánkban a Hódmezővásárhely-I fúrás 35. és 40. magfúrási szakaszaiból (5167,0-5183,0 m, ill...

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Section: Diagenezis-történeti éRtékelésunclassified

Az Endrődi Formáció kőzettani és palinológiai vizsgálata a Hódmezővásárhely–I fúrásban (Makói-árok) — őskörnyezeti és diagenezis-történeti értékelés

Varga¹,

Baranyi

Raucsik³

et al. 2017

Földt. Közl.

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“…Fluids that cause dissolution are undersaturated with respect to the solid phase. Such fluids can either be meteoric waters (see Hesse and Abid, 1998) or rich in acids generated during diagenesis by the degradation of organic matter and clay diagenetic reactions (see Hesse and Abid, 1998) in shales which are interbedded with sandstones. The best reservoir rocks having good porosities (20-30%) and high permeabilities (12-6000 mD) have been observed at depth ranges of 2300-3300 m (Fig.…”

Section: Reservoir Implicationsmentioning

confidence: 99%

Diagenetic history of the Surma Group sandstones (Miocene) in the Surma Basin, Bangladesh

Rahman

McCann

2012

Journal of Asian Earth Sciences

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“…Absolute dating of the age of illitization in the basin is not yet available but is in progress (Ph.D. project by D. Schumann). A petrographic study of diagenetic parageneses in four sandstone reservoirs of the Hibernia oilfield indicated that hydrocarbon migration was one of the last diagenetic events in the basin (Hesse and Abid, 1998). Preliminary results of a more recent fluid inclusion study (Parnell et al, 2001), however, seem to suggest that hydrocarbon migration and pore-fluid expulsion events may have alternated.…”

Section: Relationship Between Illitization Anomalies and Hydrocarbon mentioning

confidence: 99%

Illitizing fluids as precursors of hydrocarbon migration along transfer and boundary faults of the Jeanne d’Arc Basin offshore Newfoundland, Canada

Abid

Hesse

2007

Marine and Petroleum Geology

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Carbonate Cementation—Key to Reservoir Properties of Four Sandstone Levels (Cretaceous) in the Hibernia Oilfield, Jeanne D'Arc Basin, Newfoundland, Canada

Cited by 15 publications

References 0 publications

Az Endrődi Formáció kőzettani és palinológiai vizsgálata a Hódmezővásárhely–I fúrásban (Makói-árok) — őskörnyezeti és diagenezis-történeti értékelés

Az Endrődi Formáció kőzettani és palinológiai vizsgálata a Hódmezővásárhely–I fúrásban (Makói-árok) — őskörnyezeti és diagenezis-történeti értékelés

Diagenetic history of the Surma Group sandstones (Miocene) in the Surma Basin, Bangladesh

Illitizing fluids as precursors of hydrocarbon migration along transfer and boundary faults of the Jeanne d’Arc Basin offshore Newfoundland, Canada

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