Environmental Controls and Facies Architecture of a Jurassic Carbonate Episode (La Manga Formation), Mendoza Province, Neuquén Basin

Palma, Ricardo Manuel; Bressan, Graciela Susana; Riccardi, Alberto; López-Gómez, Julián; Martı́n-Chivelet, Javier

doi:10.1007/978-3-030-29680-3_4

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…It has been proposed that thermal sulfate reduction (TSR), organic acids, and deep hydrothermal fluids may be critical causes of dissolution [9][10][11][12][13]. Others have proposed that the development of carbonate rock reservoirs is mainly controlled by sedimentary facies [14][15][16][17], suggesting that porosity in deeply buried carbonate rock reservoirs can be maintained during the burial process. However, the impact of late diagenetic processes, such as dissolution or recrystallization, depends on the depositional processes and early diagenetic events.…”

Section: Introductionmentioning

confidence: 99%

Paragenesis and Formation Mechanism of the Dolomite-Mottled Limestone Reservoir of Ordovician Ma4 Member, Ordos Basin

Yang,

Wang,

Fan

et al. 2023

Minerals

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Despite the discovery of high-producing natural gas reservoirs in the low-permeability dolomite-mottled limestone (DML) reservoir of the fourth Member (Ma4) of the Majiagou Formation in the Ordos Basin, the current understanding of the processes responsible for reservoir formation are still superficial, which extremely restricts the effectiveness of deep petroleum exploration and development in the basin. Therefore, this study analyzed the paragenesis process of the DML reservoir through systematic petrographic and geochemical measurements. The DML consists of burrows and matrix. The burrows are mainly filled with dolomite with a small amount of micrite, calcite cement, and solid bitumen. The matrix mainly consists of wakestone or mudstone. The DML has experienced multiple diagenetic events, including seepage-reflux dolomitization, compaction, calcite cement CaI cementation, micrite recrystallization, dissolution, hydrocarbon charging, calcite cement CaII cementation, and dolomite progressive recrystallization. Dolomitization is critical to the DML reservoir formation. The pore created by dolomitization is the hydrocarbon-migrated pathway and storage space. Due to the difference in Mg2+-rich fluid supply, the degree of dolomitization decreases from west to east, which causes the difference in diagenetic evolution of the western and eastern parts of the study area. The high dolomitization degree led to strong anti-compaction ability in the west, contrary to the east. Thus, the reservoir quality of the west is better than the east.

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Section: Introductionmentioning

confidence: 99%

Paragenesis and Formation Mechanism of the Dolomite-Mottled Limestone Reservoir of Ordovician Ma4 Member, Ordos Basin

Yang,

Wang,

Fan

et al. 2023

Minerals

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Behavioural and Environmental Significance of the Rosetted trace Fossil Dactyloidites ottoi (Geinitz, 1849) from the Early Cretaceous (Berriasian) of Kachchh, Western India

Patel

Shitole

Darngawn

et al. 2023

Journal of the Geological Society of India

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For decades, naming the rosetted trace fossil species of Dactyloidites ottoi or Haentzschelinia ottoi has been a matter of discussion. The phobotactic behaviour of the trace makers reflecting systematic mining to form branched radial elements converging at the central vertical shafts in both the ichnogenera are similar and foreknown. Berriasian marine deltaic deposits of the Jhuran Formation, India, contain several such endichnial mid-tier traces of Dactyloidites ottoi (Geinitz, 1849), at six different levels in a highly bioturbated subarkosic bedded sandstone. Its occurrence is associated with Arenicolites, Ophiomorpha, Planolites and Rhizocorallium. The analysis of the trace fossils from the archives reveals the mining strategy resulting in Cambrian to Holocene Dactyloidites and Haentzschelinia traces. The present specimens of D. ottoi and the morphological variants within the traces also indicate an effect of the variations in palaeobiological and palaeoenvironmental aspects.

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Environmental Controls and Facies Architecture of a Jurassic Carbonate Episode (La Manga Formation), Mendoza Province, Neuquén Basin

Cited by 2 publications

References 47 publications

Paragenesis and Formation Mechanism of the Dolomite-Mottled Limestone Reservoir of Ordovician Ma4 Member, Ordos Basin

Paragenesis and Formation Mechanism of the Dolomite-Mottled Limestone Reservoir of Ordovician Ma4 Member, Ordos Basin

Behavioural and Environmental Significance of the Rosetted trace Fossil Dactyloidites ottoi (Geinitz, 1849) from the Early Cretaceous (Berriasian) of Kachchh, Western India

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