Enrichment of diamondoids and 13C in condensate from Hudson Canyon, US Atlantic

Sassen, Roger; Post, Paul J.

doi:10.1016/j.orggeochem.2007.10.004

Cited by 23 publications

(29 citation statements)

References 8 publications

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“…Since adamantane (the simplest diamondoid) was first discovered in petroleum in 1933, more diamondoids have been detected in many crude oils (Bender et al, 1986;Williams et al, 1986;Wingert, 1992;Chen et al, 1996;Dahl et al, 1999;Grice et al, 2000;Azevedo et al, 2008), petroleum products (Wang et al, 2006), coals and sedimentary rocks (Imuta and Ouchi, 1973;Aczel et al, 1979;Schulz et al, 2001;Wei et al, 2006a), and gas condensates (Lin and Wilk, 1995;Stout and Douglas, 2004;Sassen and Post, 2008). Furthermore, some higher diamondoids (more than three diamond cages) have been separated and identified from petroleum (Dahl et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of diamondoids in crude oils using gas chromatography–triple quadrupole mass spectrometry

Liang

Xiong

Fang

et al. 2012

Organic Geochemistry

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Section: Introductionmentioning

confidence: 99%

Quantitative analysis of diamondoids in crude oils using gas chromatography–triple quadrupole mass spectrometry

Liang

Xiong

Fang

et al. 2012

Organic Geochemistry

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“…Below this salt layer are up to 5 km of alluvial and lacustrine sediments that were deposited in halfgrabens in the Late Triassic and Early Jurassic. Sassen and Post (2007) performed an organic geochemical analysis of gas condensates taken from Upper Jurassic sandstones in the Baltimore Canyon Trough in the late 1970's. This study concluded that the condensates must have originated in the Lower Jurassic to Middle Jurassic since the Upper Jurassic was not mature enough.…”

Section: Discussionmentioning

confidence: 99%

Hydrocarbon potential of the mesozoic carbonates of the Bahamas

Epstein¹,

Clark²

2009

Carbonates Evaporites

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In the early 1980's, the Getty Oil Company developed petroleum play concepts for several lease areas that it controlled in the Bahamas. Interest in these areas was based upon the facts that both Cuba and Florida had producing oil fields, oil shows were reported in test wells that had been drilled in the Bahamas and the well logs from these test wells indicated that the amount of evaporites in the Bahamas Platform carbonate-evaporite complex increased with depth. Evaporites indicate arid and often anoxic and reducing depositional environments which is favorable to the preservation of organic material.The Getty frontier exploration team addressed the formation and occurrence of source rocks, the thermal maturation histories of the potential source rocks, the presence of reservoir quality rock and possible migration pathways. The southern Bahamas was identified as the area that probably had the greatest amount of mature source rock. Thermal maturation (Lopatin) profiles for the Cay Sal well indicated that the Jurassic and Lower Cretaceous were within the oil generation window and the Upper Cretaceous was inunature. Thermal maturation (Lopatin) profiles for the Long Island well indicated that the Lower Jurassic was in the gas generation window, the Upper Jurassic and Lower Cretaceous were within the oil generation window and the Upper Cretaceous was inunature. Thermal maturation (Lopatin) profiles for the Great Isaac well indicated that the Jurassic and Lower Cretaceous were within the early oil generation window and the Upper Cretaceous was immature. Dolostone, with estimated porosities ofbetween 10% and 18% were thought to be likely reservoirs. Secondary reservoir objectives were skeletal, oolitic and reefal limestones. Evaporites, mainly in the form of anhydrites, and nonporous carbonates were identified as probable seals.Successful deep wells in the Gulf of Mexico are targeting subsalt structures at depths greater than 20,000 feet (6,100 m) (McMoran Exploration Co., 2009). The presence of significant hydrocarbons and reservoir quality rock at these depths, coupled with advances in seismic imaging, has opened up the possibility of the existence of other successful deep plays in frontier areas, such as the Bahamas.

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“…Examples include diamondoid and C isotope analysis (Sassen & Post 2008), which when carried out on minor condensate in the Baltimore Canyon Trough on the eastern North American passive margin (Prather 1991) possibly point to extreme thermal cracking of oils from a Lower-Middle Jurassic source rock. Elsewhere dilution of a minor but effective charge system by a prolific one may obscure a secondary play.…”

Section: Local Source Rocksmentioning

confidence: 99%

Passive margins: overview

Levell

Argent

Doré³

et al. 2010

PGC

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Passive margins have been the reliable, accessible mainstay of exploration success worldwide for the last 25 years, and have hosted the spectacularly fast exploitation of deepwater resources (Angola, Nigeria, Brazil, Trinidad, USA Gulf of Mexico, Egypt, Australia and India). Despite, or perhaps because of this, there is still much to learn about the variety of hydrocarbon habitats they present.For example: (1) deep seismic observations and deep sea drilling have revealed more of the diversity of passive margins geodynamics. This liberates explorationists from simple geodynamic models, with consequences not only for new views of thermal history but also for the whole tectonic and stratigraphic evolution. For example, the time significance assigned to the geometries traditionally labelled 'pre-rift, syn-rift and sag' may be misleading. This has implications for correlations, the significance assigned to unconformities and sequence boundaries, heat flow and structural history. (2) New deep imaging of the sedimentary sections has revealed mistaken assumptions about the importance of 'mobile substrate' in major deltas and allowed the detailed unravelling of salt and shale movement and its implications for reservoir and trap. (3) Depositional models for deepwater reservoirs have increased in predictive capability and modern seismic imaging supports new models for shallow water sequences. (4) Discoveries of very large amounts of dry bacterial methane in stratigraphic traps have challenged old assumptions about prospectivity based on thermally matured source rocks. (5) New engineering and development technologies are opening up the commercialization of remote frontiers. As a consequence there is legitimate scope to re-visit old 'dogmas' and to propose that each passive margin segment is best regarded as unique, with analysis and interpretation rooted in observation rather than models (at least while the newly proposed models evolve to stability). Many of these themes were visited in the Passive Margins session of the Seventh Petroleum Geology Conference, held in London in 2009. This paper outlines some of these ideas, and considers how exploration along passive margins in the next decade can use new geoscience thinking.

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Enrichment of diamondoids and 13C in condensate from Hudson Canyon, US Atlantic

Cited by 23 publications

References 8 publications

Quantitative analysis of diamondoids in crude oils using gas chromatography–triple quadrupole mass spectrometry

Quantitative analysis of diamondoids in crude oils using gas chromatography–triple quadrupole mass spectrometry

Hydrocarbon potential of the mesozoic carbonates of the Bahamas

Passive margins: overview

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