Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group

J, Kuś; Araujo, Carla Viviane; Borrego, Ángeles G.; Flores, Deolinda; Hackley, Paul C.; Hámor-Vidó, Mária; Kalaitzidis, Stavros; Kommeren, C.J.; Kwiecińska, Barbara; Mastalerz, María; Filho, João Graciano Mendonça; Menezes, Taíssa Rêgo; Misz‐Kennan, Magdalena; Nowak, Grzegorz J.; Petersen, Henrik I.; Rallakis, Dimitrios; Suárez‐Ruíz, Isabel; Sýkorová, Ivana; Životić, Dragana

doi:10.1016/j.coal.2017.04.013

Cited by 46 publications

(7 citation statements)

References 52 publications

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“…In polished sections this orange AOM occurs as thick (≈10-50µm) laminar bodies with a low orange/brown fluorescence and is often associated with pyrite framboids (Fig.5A, B). Well-described in previous work on KCF (Boussafir et al, 1995b;Boussafir and Lallier-Vergès, 1997), these maceral particles are often called 'bituminites' (Kus et al, 2017). The least abundant amorphous fraction is black AOM (<14%, Tab.1 and Fig.4C) which comes from the mix of bacterial macromolecules with altered lignaceous debris (Boussafir and Lallier-Vergès, 1997).…”

Section: Palynofacies and Maceral Compositionsmentioning

confidence: 83%

Effect of organic matter composition on source rock porosity during confined anhydrous thermal maturation: Example of Kimmeridge-clay mudstones

Cavelan

Boussafir

Milbeau

et al. 2019

International Journal of Coal Geology

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To investigate how slight differences in the total particulate organic matter (OM) assemblage and maceral types of marine mudstones influence the development and the evolution of OM porosity throughout the same formation, laboratory gold-tube anhydrous confined thermal maturation was applied on low-mature organic-rich marine Kimmeridge clay mudstones (Yorkshire, UK). Organic petrography (palynofacies and maceral analysis), SEM observations, global and molecular geochemical characterization and low-pressure nitrogen adsorption measurements were performed to examine, to our knowledge for the first time, the role of the OM composition and properties on the evolution of porosity during thermal maturation. Evidence from organic petrography and geochemical analyses showed that organic-rich Kimmeridge clay samples containing a higher relative proportion of brown amorphous organic matter (AOM), known to be derived essentially from the cell walls of microalgae, exhibit a different pore evolution compared to samples containing a higher proportion of oil-prone orange AOM derived primarily from preservation by natural sulfurization of phytoplanktonic organic components naturally rich in lipidic compounds. OM conversion of orange AOM-rich samples has led to the production of higher amounts of low viscous oil and abundant gaseous hydrocarbon that are more 2 favorable to the formation of abundant but small OM micropores and mesopores in the condensate/wet gas zone and less abundant large modified mineral pores in the dry gas zone. The secondary cracking of the heavier oil produced by brown-AOM-rich OM has led to the formation of a greater quantity of CO2 and an abundant organic-rich residue more favorable to the formation of larger mesopores. Moreover, the more abundant thick laminar bituminite macerals forming a continuous ductile network particularly prone to compaction and the higher amounts of oil/bitumen generated during their conversion may have led to a higher pore collapse after oil/gas generation and migration, responsible for the destruction of part of the secondary pore network observed on some samples. Despite their slightly lower oil-prone potential, brown AOM-rich samples have thus developed larger mesopores during thermal maturation, resulting in higher pore volumes in the dry gas zone. Thus, the ability of marine mudstones to develop pores during maturation do not increase proportionally with the OM oil prone quality. These results show that variations in the individual particulate OM assemblage of a similar type II kerogen can significantly influence the amount of oil and gas generated during thermal maturation throughout the same formation, resulting in different pore evolution models. This reveals the importance of clearly identifying the composition of the original particulate OM assemblage to better predict the amount of bitumen, oil and gas generated during thermal maturation and the associated pore development.

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Section: Palynofacies and Maceral Compositionsmentioning

confidence: 83%

Effect of organic matter composition on source rock porosity during confined anhydrous thermal maturation: Example of Kimmeridge-clay mudstones

Cavelan

Boussafir

Milbeau

et al. 2019

International Journal of Coal Geology

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“…Primary deposition of flocculent lipid components under oxygen-deficient bottom water conditions results in accumulation of an early diagenetic bituminous matter, regarded as bituminite in immature carbonaceous rocks 23 – 26 , 41 , 42 . Further biodegradation and other low temperature alteration of bituminite during the diagenesis stage can result in formation of degraded bituminite designated in this study as diagenetic solid bitumen (Table 1 ; Fig.…”

Section: New Genetic Model For Generation Of Bitumen and Solid Bitumementioning

confidence: 99%

Genesis of solid bitumen

Sanei

2020

Sci Rep

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This paper presents a new schematic model for generation and timing of multiple phases of solid bitumen throughout the continuum of organic matter maturation in source and tight reservoir rocks. Five distinct stages in the evolution of solid bitumen are proposed: (1) diagenetic solid bitumen (or degraded bituminite), which is not a secondary maceral resulting from the thermal cracking of kerogen. Instead it is derived from degradation of bituminite in the diagenesis stage (Ro < 0.5%); (2) initial-oil solid bitumen, is a consolidated form of early catagenetically generated bitumen at the incipient oil window (Ro ~ 0.5–0.7%); (3) primary-oil solid bitumen is derived from thermally generated bitumen and crude oil in the primary oil window (Ro ~ 0.7–1.0%); (4) late-oil solid bitumen (solid-wax) is derived from the waxy bitumen separated from the mature paraffinic heavy oil in the primary- and late-oil windows; and (5) pyrobitumen, which is mainly a non-generative solid bitumen, is evolved from thermal cracking of the remaining hydrocarbon residue and other types of solid bitumen in the dry gas window and higher temperature (Ro > 1.4%). This model shows concurrence of multi-populations solid bitumen with oil, bitumen, and other phases of fluid hydrocarbon residue during most of the maturity continuum.

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“…Bi tu mi nous as so ci a tion (BA) -this is based on bituminite abun dance in maceral com po si tion. In general, bituminite is con sid ered a by prod uct of com plete de com po si tion of var i ous or ganic pro gen i tors, e.g., algae, an i mal plank ton, bac te rial lipids (Teichmüller and Ottenjann, 1977;Rob ert, 1979;Stach et al, 1982;Taylor et al, 1998;Kus et al, 2017;Pickel et al, 2017; , 2017). A typ i cal fea ture of bituminite is the lack of a spe cific or dis tinct form.…”

Section: Discussion Organic Associationsmentioning

confidence: 99%

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

NOWAK¹,

GÓRECKA-NOWAK²,

Karcz

2022

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As so ci ate Ed i tor: Dariusz Wiêc³aw We de scribe the or ganic pe trog ra phy, palynology and Rock-Eval py rol y sis val ues of lac us trine black shales termed the Anthracosia Shales (Up per Car bon if er ous/Lower Perm ian) in the Intrasudetic Ba sin (Sudetes, SW Po land). Sam ples were taken from cores of two bore holes: Rybnica Leoena PIG 1 and OEcinawka OErednia PIG 1. Maceral com po si tion, miospore assem blage com po si tion, palynofacies and geo chem i cal char ac ter is tics of dis persed or ganic mat ter in the Anthracosia Shales were used to de ter mine con di tions of the en vi ron ment and to eval u ate their pe tro leum po ten tial. Data from both or ganic petrog ra phy and palynology anal y ses en abled rec og ni tion of three broadly dis tinct or ganic as so ci a tions in these shales: bi tu minous, humic, and in ter me di ate, while Rock-Eval py rol y sis re vealed the pres ence of bi tu mi nous and humic kerogen types I and III. Type I cor re sponds to the bi tu mi nous as so ci a tion, with amor phous or ganic mat ter (AOM) dom i nant in the palynofacies, and type III cor re sponds to the humic as so ci a tion with phytoclasts pre vail ing in the palynofacies. The ther mal ma tu rity of the or ganic mat ter is de ter mined by the val ues of: (1) vitrinite reflectance V Ro = 0.53-0.73%, (2) palynomorph 3-4 col our in dex, and (3) T max = 443-447°C, which in di cate oil win dow ma tu rity. Some of the TOC re sults (1.6-2.9 wt.%) in di cate that the Anthracosia Shales are good and very good pe tro leum source rocks, though the thick ness of this in ter val is low (4-5 m). Shales with TOC val ues <0.5 wt.% pre vail, and may be classifed as poor source rocks.

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Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group

Cited by 46 publications

References 52 publications

Effect of organic matter composition on source rock porosity during confined anhydrous thermal maturation: Example of Kimmeridge-clay mudstones

Effect of organic matter composition on source rock porosity during confined anhydrous thermal maturation: Example of Kimmeridge-clay mudstones

Genesis of solid bitumen

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

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