Organic matter in the Soultz HDR granitic thermal exchanger (France): natural tracer of fluid circulations between the basement and its sedimentary cover

1996 ◽  
Vol 70 (3-4) ◽  
pp. 235-253 ◽  
Author(s):  
Béatrice Ledésert ◽  
Janie Joffre ◽  
André Amblès ◽  
Paul Sardini ◽  
Albert Genter ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sedimentary Cover ◽  
Natural Tracer ◽  
Thermal Exchanger

Hydrocarbon Generative Properties and Maturity of Cretaceous and Eocene Sediments in the Middle Kura Depression, Azerbaijan

2021 ◽  
Author(s):  
Shahin Khosrov Akhundov ◽  
Mushfig Farhad Tagiyev ◽  
Arastun Ismail Khuduzade ◽  
Natig Namig Aliyev
Keyword(s):  
Organic Matter ◽  
Brown Coal ◽  
Lower Cretaceous ◽  
Vitrinite Reflectance ◽  
Sedimentary Cover ◽  
Hard Coal ◽  
Marine Origin ◽  
Formation Conditions ◽  
Lesser Caucasus ◽  
Reflectance Data

Abstract Meso-Cenozoic sedimentary cover in the Middle Kura depression located between the Greater and Lesser Caucasus mountain structures contains numerous oil accumulations. According to studies in the Cretaceous and Paleogene strata, sedimentary organic matter is of mixed clastic-marine origin. Moderate amounts of organic matter have been recorded in the Eocene sediments (on average 0.70%), in the Upper and Lower Cretaceous average values made up 0.39% и 0.42%, respectively. Analysis of bitumoid composition suggests that in a number of areas bitumoids have experienced a widespread movement across the sedimentary strata. The results of measurements on isolated samples indicate that the Cretaceous strata have only advanced to the initial hard-coal stage of organic transformation (0.48-0.55%Ro). On vitrinite reflectance data the Eocene deposits in studied areas of the Middle Kura depression have reached initial (brown-coal) stage of catagenetic transformation (±0.48Ro%; est. paleotemperature of 85°C). Nonetheless, analysis of formation conditions of commercial HC accumulations found earlier in the Eocene strata allows considering them the most prospective in the Middle Kura depression.

scholarly journals Assessment of hydrocarbon potential of Jurassic and Cretaceous source rocks in the Tarnogród-Stryi area (SE Poland and W Ukraine)

2012 ◽  
Vol 63 (4) ◽  
pp. 319-333 ◽  
Author(s):  
Paweł Kosakowski ◽  
Dariusz Więcław ◽  
Adam Kowalski ◽  
Yuriy Koltun
Keyword(s):  
Organic Matter ◽  
Middle Jurassic ◽  
Sedimentary Cover ◽  
Source Rocks ◽  
Hydrocarbon Potential ◽  
Hydrocarbon Generation ◽  
Hydrocarbon Source Rock ◽  
Core Samples ◽  
Se Poland ◽  
Geochemical Parameters

Assessment of hydrocarbon potential of Jurassic and Cretaceous source rocks in the Tarnogród-Stryi area (SE Poland and W Ukraine) The Jurassic/Cretaceous stratigraphic complex forming a part of the sedimentary cover of both the eastern Małopolska Block and the adjacent Łysogóry-Radom Block in the Polish part as well as the Rava Rus'ka and the Kokhanivka Zones in the Ukrainian part of the basement of the Carpathian Foredeep were studied with geochemical methods in order to evaluate the possibility of hydrocarbon generation. In the Polish part of the study area, the Mesozoic strata were characterized on the basis of the analytical results of 121 core samples derived from 11 wells. The samples originated mostly from the Middle Jurassic and partly from the Lower/Upper Cretaceous strata. In the Ukrainian part of the study area the Mesozoic sequence was characterized by 348 core samples collected from 26 wells. The obtained geochemical results indicate that in both the south-eastern part of Poland and the western part of Ukraine the studied Jurassic/Cretaceous sedimentary complex reveals generally low hydrocarbon source-rock potential. The most favourable geochemical parameters: TOC up to 26 wt. % and genetic potential up to 39 mg/g of rock, were found in the Middle Jurassic strata. However, these high values are contradicted by the low hydrocarbon index (HI), usually below 100 mg HC/g TOC. Organic matter from the Middle Jurassic strata is of mixed type, dominated by gas-prone, Type III kerogen. In the Polish part of the study area, organic matter dispersed in these strata is generally immature (Tmax below 435 °C) whereas in the Ukrainian part maturity is sufficient for hydrocarbon generation.

scholarly journals Organic matter in rock–water systems of petroliferous basins: interrelationships (a case study: South Caspian Basin)

2019 ◽  
Vol 74 ◽  
pp. 74
Author(s):  
Akper A. Feyzullayev ◽  
Ian Lerche
Keyword(s):  
Organic Matter ◽  
Sedimentary Cover ◽  
Water System ◽  
Underground Water ◽  
Depth Interval ◽  
Caspian Basin ◽  
Hydrocarbon Generation ◽  
Mud Volcanoes ◽  
South Caspian Basin ◽  
And Migration

Generalizations and analyses are given of the data accumulated to date on the content of Organic Matter (OM) in formation waters of various stratigraphic complexes, as well as of mud volcanoes, and the correlation with OM in South Caspian Basin (SCB) sedimentary rocks. Results are based on about 300 analyses of formation waters and waters of mud volcanoes, as well as on more than 400 analyses of the content of OM in rocks (outcrops and wells from both onshore and offshore petroleum fields of the SCB). The stratigraphic interval covers the period from the Lower Pliocene to the Jurassic, and the depth interval from 73 m to 6043 m. In these intervals, the values of Dissolved Organic Matter (DOM) in reservoir waters vary from 4.1 mg/L to 271.2 mg/L, averaging (219 analyses) 48.9 mg/L. A good correlation has been established between the values of DOM and OM in rocks. Paleogene and Jurassic rocks have the highest correlations. DOM varies with depth with an increase in value from a depth of about 3.3 km, likely due to catagenetic transformation of OM into hydrocarbons in the rock–water system. The highest values of DOM are for waters with mineralization less than 50 g/L. Mud volcano waters are characterized by low levels of DOM and low mineralization, likely due to the condensate nature. The results of the studies show that underground water, as one of the components of a single rock–water system of the Earth’s sedimentary cover, together with the rocks, participates in the processes of hydrocarbon generation and migration.

scholarly journals BIOGEOQUÍMICA DA MATÉRIA ORGÂNICA E METAIS EM UM MANGUEZAL NA ZONA ESTUARINA URBANA, BAHIA, BRASIL

2012 ◽  
Author(s):  
Consuelo Lima Navarro de Andrade ◽  
Joil José Celino ◽  
Ronaldo Montenegro Barbosa ◽  
Karina Santos Garcia ◽  
Narayana Flora Costa Escobar
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Rhizophora Mangle ◽  
Molar Ratio ◽  
Laguncularia Racemosa ◽  
Estuarine Area ◽  
Mangrove Vegetation ◽  
Concentration Factors ◽  
Natural Tracer ◽  
Nitrogen Phosphorus

O comportamento biogeoquímico do carbono, nitrogênio, fósforo e metais, e os isótopos traçadores naturais da matéria orgânicaforam estudados nos sedimentos e plantas em 15 pontos no estuário do rio Passa Vaca, situado em área urbana de Salvador, Bahia, Brasil.Nos sedimentos, a ordem dos elementos investigados foi: Fe > Al > Ca > P > Na >Cu >K > Zn > Mn, para a espécie Laguncularia racemosa (L.)Gaertn observou-se: Na > Ca > K > Fe > Mn > Al > Zn > Cu; e para Rhizophora mangle L: Na > Ca > K > Mn > Fe > Al > Zn > Cu além decorrelações sedimento/planta na concentração dos elementos. Entretanto, os fatores de concentração para os metais pesados estiveramabaixo de 1 indicando baixa absorção destes pelas plantas. O Carbono Orgânico Total (COT) variou de 1,03 a 4,77%. A razão molar C/N eisotópicas 13C e 15C indicaram que um percentual considerável da matéria orgânica é de fonte terrestre, sendo proveniente da vegetaçãodo próprio manguezal.Palavras-chave: Metais, matéria orgânica, isótopos. ABSTRACTBIOGEOCHEMISTRY OF ORGANIC MATTER AND METALS IN A MANGROVE AT THE URBAN ESTUARINE AREA, BAHIA, BRAZIL -The biogeochemical behavior of carbon, nitrogen, phosphorus, metals and natural tracer isotopes of organic matter were studied insediments and plants at 15 points in the estuary of the Passa Vaca River, located in urban area of Salvador, Bahia, Brazil. Sedimentelements were the order: Fe> Al> Ca> P> Na> Cu> K> Zn> Mn, for the specie Laguncularia racemosa (L.) Gaertn was observed: Na> Ca> K>Fe> Mn> Al> Zn> Cu, and Rhizophora mangle L: Na> Ca> K> Mn> Fe> Al> Zn> Cu. Correlations were also observed sediment/plant in theconcentration of elements evaluated. However, the concentration factors for heavy metals were below 1 indicating low absorption ofthese plants. The Total Organic Carbon (TOC) ranged from 1.03 to 4.77%. The molar ratio C / N and isotopic 13C and 15C indicated that asignificant percentage of organic matter is land-based sources, and from the mangrove vegetation itself.Keywords: Metals, organic matter, isotopes.

scholarly journals Geochemical features of the organic matter from Jurassic sediments of the Nadym‑Taz interfluve

Georesursy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 21-27
Author(s):  
Lyubov S. Borisova ◽  
Alexander N. Fomin ◽  
Ekaterina S. Yaroslavtseva
Keyword(s):  
Organic Matter ◽  
Sedimentary Cover ◽  
Lower Jurassic ◽  
Geochemical Data ◽  
The North ◽  
Deep Wells ◽  
Geochemical Parameters ◽  
Insoluble Organic Matter ◽  
Bazhenov Horizon ◽  
Rock Eval

This paper deals with the evaluation of oil-generation potential derived from the geochemical data on deep-buried Jurassic sedimentary rocks of the Nadym-Taz interfluve being part of the West Siberian petroleum basin (PB). The study provides analysis of samples from ultra-deep and deep wells that penetrated the Mesozoic-Cenozoic sedimentary cover in the north of the central part of PB (En-Yakhinsky, Evo-Yakhinsky, Yarudeysky, Tyumensky areas, etc.). The research focuses on the insoluble organic matter (OM) from Upper, Middle and Lower Jurassic sediments (54 samples). A comprehensive study of the kerogen by elemental, isotope analyses and pyrolysis Rock-Eval allowed obtaining the data critical for determining the genetic type of OM, its thermal maturity and residual petroleum generating potential. Using the Surfer and Corel Draw software, schematic maps and diagrams of variations in the most informative (i.e. area-specific and depth-dependent) geochemical parameters of the kerogen on the studied area and also down the section (from the Upper to the Lower Jurassic) were constructed and analyzed. The obtained geochemical data indicate that in the Jurassic sediments of the Nadym-Tazovsky interfluve, the highest OM generation potential is found in the Bazhenov horizon, as well as in individual members of the Malyshevsky, Leontievsky, Sharapovsky and Kiterbyutsky horizons. Based upon the level of OM maturity in the Upper and Middle Jurassic sediments, deposits of mainly oil and fat gases could be preserved, and in the Lower Jurassic – deposits of fat and dry gases.

scholarly journals Spatial sedimentary distribution, seasonality and the characteristics of organic matter on Fernando de Noronha insular shelf

2018 ◽  
Vol 66 (1) ◽  
pp. 131-156
Author(s):  
Roberto Lima Barcellos ◽  
Liza Ellen Eurico de Oliveira ◽  
Manuel de Jesus Flores-Montes
Keyword(s):  
Organic Matter ◽  
Anthropogenic Impacts ◽  
Sedimentary Cover ◽  
Organic Matter Content ◽  
Fine Sand ◽  
Coarse Fraction ◽  
Matter Content ◽  
Sediment Distribution ◽  
Fernando De Noronha ◽  
Insular Shelf

Abstract The present study was conducted in the Fernando de Noronha archipelago (4°S/32°W). The objective is the evaluation of the spatial distribution and seasonal variations in the sediments and sedimentary organic matter in the northern insular shelf of Fernando de Noronha ("Mar de Dentro"). Nineteen surface sediment samples were collected between December 2013, July 2014 and November 2014. The studied methods included analysis of the grain size, coarse fraction, morphoscopy, total organic matter content, calcium carbonate, organic carbon, total nitrogen, sedimentary phosphorus (organic, inorganic and total), elemental ratios (C/N, C/P) and stable isotopic ratios (δ13C-δ15N). The results allowed to infer that there is no seasonal variation in sediment distribution. Whereas, the shelf sediments present a calcareous sandy sedimentary cover (CaCO3≈ 88.3%), predominantly of well-sorted fine sands, with low organic matter content (TOM<2.87%, TOC<4.29%, TP<0.44µmol/g) and are mainly of marine origin (δ13C ≈ -22.17%PDB). As conclusions was observed a spatial variation, where the southwestern part is dominated by gravelly and northeast part is composed for fine sand, conditioned by the bottom morphology, sediments sources and, wave action. The geochemistry showed some stations with relative enrichment in organic matter content (TOC>3.0%; TN>0.4%) of mixed origin (δ13C= -24.5 to -23.0%PDB), which were related to anthropogenic impacts and the biotic and abiotic local processes.

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