YANG, Y., ZOU, R., SHI, Z. & JIANG, R. (eds) 1996. Atlas for Coal Petrography of China. vi + 323 pp. Beijing: China University of Mining and Technology Press. Price US $198.00 (hard covers). ISBN 7 81040 519 5. POTTER, J., STASIUK, L. D. & CAMERON, A. R. (eds) 1998. A Petrographic Atlas of Canadian Coal Macerals and Dispersed Organic Matter. viii + 105 pp. Calgary: Geological Survey of Canada, jointly with the Canadian Society for Coal Science and Organic Petrology and the Canmet Energy Technology Centre. Price C$138.00 (C$117.30 for members of the Society); hard covers. ISBN 0 660 17538 X.

1999 ◽  
Vol 136 (6) ◽  
pp. 697-711
Author(s):  
Andrew C. Scott
Keyword(s):  
Organic Matter ◽  
Geological Survey ◽  
Energy Technology ◽  
Canadian Society ◽  
Organic Petrology ◽  
Coal Macerals ◽  
Coal Petrography ◽  
Beijing China

scholarly journals Direct signs of oil-generation in the rocks of Bazhenov Suite

Georesursy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 152-157
Author(s):  
Natalia V. Pronina ◽  
Anastasiya P. Vaitekhovich
Keyword(s):  
Organic Matter ◽  
Oil And Gas ◽  
Secondary Porosity ◽  
Organic Petrology ◽  
Oil Generation ◽  
Microscopic Studies ◽  
Oil Source ◽  
Coal Petrography ◽  
Long Term Studies

Nowadays, the term “organic petrology” is widely used for the microscopic study of the organic matter (OM) of rocks. In the world, there are a large number of articles describing organic macerals in regions where shale oil and gas are produced. It is no coincidence that the new term “organic petrology” appeared instead of “coal petrography” since new macerals were found and described in the dispersed organic matter. So, along with alginites (previously the only term describing the oil-source sapropel-type OM), bituminite and bitumen appeared. Bituminite is heterogeneous, so it has varieties as “post-mature bituminite” and “atypical bituminite”. One of the typical components of the Bazhenov formation, along with described above, are the remains of soft radiolarians bodies. All of these organic macerals have a similar reflectance index with small differences. Long-term studies of the OM rocks of the West Siberian basin have revealed indications of oil generation, which are easily established by standard microscopic studies. These indications include a change in the colour of macerals, a different glow of oil-source components (all from the liptinite group), the appearance of bitumen films, the appearance of post-mature bituminite, the appearance of secondary porosity.

scholarly journals Maturity of dispersed organic matter in bituminous formations of the Ionian Zone (Epirus region, NW Greece)

2017 ◽  
Vol 47 (2) ◽  
pp. 880
Author(s):  
D. Rallakis ◽  
G. Siavalas ◽  
G. Oskay ◽  
D. Tsimiklis ◽  
K. Christanis
Keyword(s):  
Organic Matter ◽  
Vitrinite Reflectance ◽  
Lower Jurassic ◽  
Source Rocks ◽  
Organic Petrology ◽  
Bituminous Shale ◽  
Petroleum Generation ◽  
Posidonia Shale ◽  
Rock Eval ◽  
Coal Petrography

The main objective of this paper is to study by means of Organic Petrology techniques, the maturity of the dispersed organic matter from certain sedimentary formations of the Ionian Zone, such as the Bituminous Shale, the Upper Siliceous Vigla Formation and the Bituminous Sandstone. The samples were collected from outcropping sites located in the region of Epirus. Initially they were treated with acids (HCl-HF) to remove most of the carbonate and silicate minerals. Then a ZnCl2 solution was used to concentrate the organic-rich fraction. Total Organic Carbon (TOC) content was determined applying dichromate oxidation. Polished blocks were prepared from the concentrated organic matter mounted in epoxy resin and examined under the coal-petrography microscope. Emphasis was given to maceral identification and vitrinite reflectance (R) measurements, which provide information regarding the quality and the maturity of the organic matter respectively, with implications for the petroleum generation potential regardless the level of alteration. The TOC and Rr values (4.74% and 0.68%, respectively) confirm to the oil potential of the Lower Jurassic Posidonia Shale. Nevertheless, it is suggested that detailed and higher resolution sampling focusing on the Lower Posidonia Shale, as well as organic petrography analyses coupled with Rock-Eval pyrolysis should be carried out in order to accurately determine its quality as petroleum source rocks.

ORGANIC PETROLOGY OF LIPTINITES IN THE DENISON TROUGH, QUEENSLAND

1987 ◽  
Vol 27 (1) ◽  
pp. 86
Author(s):  
J.W. Beeston
Keyword(s):  
Organic Matter ◽  
Energy Storage ◽  
Marine Algae ◽  
Reproductive Organs ◽  
Coal Seams ◽  
Organic Petrology ◽  
Wide Range ◽  
Coal Facies ◽  
Abandoned Channels ◽  
Lake Margin

Liptinite macerals in the Denison Trough are derived from a wide range of organisms including marine acritarchs, and non-marine algae, lycopods, articulates, ferns and gymnosperms. They are formed from the lipid and wax-rich components of these organisms, in particular from specialised tissues, leaves and reproductive organs developed for protection and/or energy storage. They occur chiefly in terrestrially deposited sediments and coals, yet their distribution is variable amongst the seven coal facies assemblages and six disseminated organic matter (DOM) suites distinguished in the trough. The most abundant liptinites are derived from miospores, leaf cuticles and algae. Miosporinite averages 2.6 per cent of total rock and is most abundant in coal seams, banded coals and carbonaceous mudstones that were deposited in ponds, abandoned channels and intraswamp lakes, where it ranges up to 14 per cent. Cutinite averages 0.7 per cent of total rock, and is most abundant in coal seams and banded coals that were deposited as leaf banks in shallow water marginal to peat swamps, where it ranges up to 10 per cent. Alginite averages 0.1 per cent of total rock, and is most abundant in mudstones that were deposited in lake margin ponds, where it ranges up to 22 per cent. Preservation of liptinites (as determined by fluorescence) is best where they were deposited in a quiet regime, at or near their sites of origin, in concentration. In some of these situations they occur in association or juxtaposition with the highly fluorescing, non-structured macerals sporogenite, phylloresinite and fluorinite. The latter are suggested as remnants of material that has otherwise yielded oil.

scholarly journals Organic Petrology and Thermal Maturity of Dispersed Organic Matter from the Ramalhal-1 Well (Lusitanian Basin, Portugal)

Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1415
Author(s):  
Paula Alexandra Gonçalves ◽  
João Graciano Mendonça Filho ◽  
Deolinda Flores
Keyword(s):  
Organic Matter ◽  
Upper Jurassic ◽  
Inorganic Materials ◽  
Mature Stage ◽  
Thermal Maturity ◽  
Solid Bitumen ◽  
Organic Petrology ◽  
Almost All ◽  
Lusitanian Basin

Organic petrology is an important tool used to characterize dispersed organic matter (DOM) in sediments and sedimentary rocks, and to assess its thermal maturity. This study was carried out on 33 cutting samples (Middle-Upper Jurassic) from the Ramalhal-1 well to characterize the particulate organic matter and to evaluate its thermal maturity. The samples were submitted to optical petrography analysis (reflected white and blue incident lights) and the mean random reflectance was measured. Microscopic observations revealed a low DOM content, characterized by the predominance of macerals of the inertinite group (including charcoal), followed by solid bitumen. Huminite/vitrinite is usually small in size and quantity. Liptinite macerals were also present, represented by sporinite, cutinite, liptodetrinite and rare bituminite. A type III-IV kerogen was defined for the Ramalhal-1 sequence. Huminite/vitrinite mean random reflectance varied between 0.38% and 0.75%, pointing to an immature-to-mature stage of the organic matter. Multi-populations of solid bitumen occurred in almost all the samples, filling voids and fractures in the inorganic materials (mainly carbonates). The bitumen populations were quite heterogeneous, concerning both the optical characteristics and distribution, displaying different thermal maturities. No relationship between vitrinite and bitumen reflectance was established, indicating that these bitumens were not generated in situ.

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