Jurassic and mid-Cretaceous carbonaceous claystones in the western (DSDP Leg 76) and eastern (DSDP leg 79) North Atlantic

Rullkötter, Jürgen; Mukhopadhyay, P. K.

doi:10.1016/0146-6380(84)90097-4

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…In addition, major oceanic anoxic events (OAEs) were associated with the massive pre-Albian to Cenomanian marine transgression (e.g. Schlanger and Jenkyns 1976;Arthur and Schlanger 1979;Rullkötter and Mukhopadhyaya 1984) and further extended up to Coniacian times after the Turonian regression (Tissot and Welte 1984). The widespread marine anoxia during the OAEs was associated with a significant burial of organic carbon on the ocean floor under oxygen-deficient bottom water conditions (Turgeon and Creaser 2008).…”

Section: Albian-aptian Source Rock Potentialmentioning

confidence: 99%

Play distribution and the hydrocarbon potential of the Mannar Basin, Sri Lanka

Kularathna

Pitawala

Senaratne

et al. 2020

J Petrol Explor Prod Technol

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The Mannar Basin is a frontier failed rift basin between India and Sri Lanka. The Sri Lankan part has an area exceeding 42,000 km2. Although the recent two gas discoveries have confirmed the existence of an active petroleum system in the Mannar Basin, a major portion of the basin is still poorly explored. This article summarized the progress of current exploration activities and the hydrocarbon potential of the Mannar Basin. This basin began to evolve since the Upper Jurassic and experienced two rifting events; an early Late Jurassic syn-rift phase associated with East–West Gondwana break up; and a later, earliest Cretaceous syn-rift phase associated with Antarctica separation from greater India around 142 Ma. Rifting was followed by a post-rift phase comprising a thermal sag period and an inversion period. Three potential source rocks intervals have been interpreted at Maastrichtian–Campanian, Albian–Aptian, and Late Jurassic stratigraphic levels. The basin modelling work has confirmed that (1) mature potential source rocks (mainly Type II) exist below the Maastrichtian–Campanian strata and (2) the best potential source rocks (mainly Type II) exist at Albian–Aptian stratigraphic levels. The Late Jurassic source rocks have more potential for gas, while other sources have potential for both oil and gas. According to basin modelling results, Maastrichtian–Campanian and Albian–Aptian source rocks reach the oil window in the present-day depocentre around 45 Ma and 80 Ma, respectively. The Late Jurassic source rocks (mainly Type III) reach the gas window around 112 Ma in the present-day depocentre. Five play levels were defined for the whole stratigraphic section of the Mannar Basin. Tertiary play level is dominated by submarine fans, mounds and rollover anticline like structures. The Upper Cretaceous play is dominated by forced-fold structures, intra-basalt turbidite sands, and sub-volcanic sand-rich systems. The Lower Cretaceous play is dominated by reefs and abrupt margin pinch outs. The Upper Jurassic play is dominated by abrupt margin pinch outs. The Basement play consists of weathered basement rocks. The main challenge of the Mannar Basin is imaging below the flood volcanic layer, which inhibits the penetration of seismic energy and results in low-quality seismic data. Therefore, hydrocarbon potential assessments have become a major challenge below the Upper Cretaceous. The interpretation shows that the basin has a low risk for the source and reservoir, and high risk for seal and traps. New exploration activity would unlock more potential areas for hydrocarbon accumulations. Finally, the findings of this study can help for better understanding of hydrocarbon potential areas and current progress of exploration activities in the Mannar Basin, Sri Lanka.

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Section: Albian-aptian Source Rock Potentialmentioning

confidence: 99%

Play distribution and the hydrocarbon potential of the Mannar Basin, Sri Lanka

Kularathna

Pitawala

Senaratne

et al. 2020

J Petrol Explor Prod Technol

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Petroleum source-rock potentials of the cretaceous transgressive-regressive sedimentary sequences of the Cauvery Basin

Chandra

Philip

Sridharan

et al. 1991

Journal of Southeast Asian Earth Sciences

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Review of marine organic geochemistry

Farrington¹

1987

Reviews of Geophysics

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Publication of this review will occur within a few months of the tenth anniversary of the volume, Concepts in Marine Organic Chemistry (Anderson, 1977). That volume reviewed the topic up to that time and provided a prognosis and stimulus for a strong program of research in marine organic geochemistry for the past ten years. The previous United States report to IUGG on this topic (Gagosian, 1983) provided an excellent review of the literature of 1979–1982 and focused in an informative manner on several specific subtopics. This review adopts the same organization format, although some of the subtopics are new and some previous subtopics are not emphasized because of the marine organic geochemical research and the new divisions within the United States report on Chemical Oceanography and Paleooceanography.

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Jurassic and mid-Cretaceous carbonaceous claystones in the western (DSDP Leg 76) and eastern (DSDP leg 79) North Atlantic

Cited by 3 publications

References 12 publications

Play distribution and the hydrocarbon potential of the Mannar Basin, Sri Lanka

Play distribution and the hydrocarbon potential of the Mannar Basin, Sri Lanka

Petroleum source-rock potentials of the cretaceous transgressive-regressive sedimentary sequences of the Cauvery Basin

Review of marine organic geochemistry

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