scholarly journals Isotopic-geochemical peculiarities of distribution of gas hydrocarbons in the Bazhenov formation section (South part of the Western Siberia)

Georesursy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 153-158 ◽  
Author(s):  
Elizaveta A. Krasnova ◽  
Anna Yu. Yurchenko ◽  
Anton G. Kalmykov ◽  
Maria M. Fomina
Keyword(s):  
Stable Carbon Isotopes ◽  
Western Siberia ◽  
Isotope Composition ◽  
Stable Carbon ◽  
Hydrocarbon Gases ◽  
Bazhenov Formation ◽  
Close Relationship ◽  
Main Factors ◽  
Formation Section ◽  
Lithological Composition

In this work we describe the distribution of stable carbon isotopes in hydrocarbon gases from four wells located in the southern and central parts of the Western Siberia. The main goal was to understand the influence of the lithological composition and geological settings on isotopic composition of gases and their formation. Two genetically different groups of hydrocarbon gases were identified based on the author’s research, as well as analysis of archival and literature materials on the isotope composition of hydrocarbons. We estimated the close relationship between the main factors of the migration, degree of metamorphism of organic matter and the isotope composition of hydrocarbon gases produced by the Bazhenov formation.

scholarly journals METHODOLOGICAL APPROACHES TO PREDICTING THE MINERAL-COMPONENT COMPOSITION OF THE BAZHENOV FORMATION BASED ON «CORE-LOGGING» INTERCONNECTIONS

2021 ◽  
Vol 2 (1) ◽  
pp. 236-245
Author(s):  
Rashid M. Saitov ◽  
Mikhail A. Fomin ◽  
Elena A. Kostyreva ◽  
Svetlana V. Rizhkova ◽  
Inga S. Sotnich ◽  
...  
Keyword(s):  
Experimental Data ◽  
Physical Properties ◽  
Western Siberia ◽  
Component Composition ◽  
Mineral Component ◽  
Bazhenov Formation ◽  
Core Logging ◽  
Methodological Approaches ◽  
Lithological Composition

The article presents a methodology developed by the authors for calculating the lithological composition of the Bazhenov Formation in Western Siberia. It is based on the identified “core-logging” interconnections between the mineral-component composition of rocks and the physical properties of the section. The convergence of experimental data and calculated values is shown. The proposed technique was tested. The conditions of its applicability have been substantiated.

scholarly journals Alginite-Rich Layers in the Bazhenov Deposits of Western Siberia

Geosciences ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 252
Author(s):  
Timur Bulatov ◽  
Elena Kozlova ◽  
Evgeniya Leushina ◽  
Ivan Panchenko ◽  
Natalia Pronina ◽  
...  
Keyword(s):  
Western Siberia ◽  
Isotope Composition ◽  
Upper Jurassic ◽  
Type I ◽  
Distinctive Features ◽  
Bazhenov Formation ◽  
Predominant Component ◽  
Petroleum Generation ◽  
Rock Eval ◽  
Kinetics Of

In this study, we identified the luminescent layers containing a significant amount of alginite in the Upper Jurassic–Lower Cretaceous Bazhenov Formation named “the alginite-rich layers”. Lithological and geochemical methods were used to determine distinctive features of these layers and to evaluate their impact on the total petroleum generation potential of the Bazhenov Formation. We have shown that the composition of the alginite-rich layers differs significantly from the organic-rich siliceous Bazhenov rocks. Rock-Eval pyrolysis, bulk kinetics of thermal decomposition, elemental analysis, and the composition of pyrolysis products indicate type I kerogen to be the predominant component of the organic matter (OM). Isotope composition of carbon, nitrogen, and sulfur was used to provide insights into their origin and formation pathways. The luminescent alginite-rich layers proved to be good regional stratigraphic markers of the Bazhenov Formation due to widespread distribution over the central part of Western Siberia. They can also be applied for maturity evaluation of the deposits from immature to middle of the oil window, since the luminescence of the layers changes the color and intensity during maturation.

scholarly journals New data on lithology, organic geochemistry and accumulation conditions of the Bazhenov formation in Western Siberia

Georesursy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 129-142 ◽  
Author(s):  
Vika G. Eder ◽  
Elena A. Kostyreva ◽  
Anna Yu. Yurchenko ◽  
Natalia S. Balushkina ◽  
Inga S. Sotnich ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carbonate Rocks ◽  
Western Siberia ◽  
Organic Geochemistry ◽  
Carbonate Content ◽  
Reservoir Properties ◽  
Bottom Part ◽  
Bazhenov Formation ◽  
Lithological Composition ◽  
Transformation Of Organic Matter

This paper presents data on lithological composition, distribution, reservoir properties, geochemistry of organic matter and genesis of carbonate rocks of the Bazhenov formation within the central part of Western Siberia (the region of the Khantei hemianteclise). The following types of carbonates are distinguished: a) primary biogenic – shell rock interlayers and residues of coccolith; b) dia- and catagenetic – in varying degrees, recrystallized rocks with coccoliths, nodules and aporadiolarites; c) catagenetic – cracks healed with calcite in limestone of the foot of the Bazhenov formation. It was determined that the crystallization of the carbonate material of nodules took place in various conditions: in the bottom part of the sediments and in the later stages of diagenesis. The source of calcite for nodules was calcareous nanoplankton or bivalve shells. The carbonate content of the cuts decreases in the following sequence: Yuzhno-Yagunsky → Povkhovsky → Novortyagunsky → Druzhny areas, which are associated both with facial features and various physicochemical conditions of diagenesis and catagenesis. Transformation of organic matter increases in the northeast direction from South Yagunsky to Povkhovsky area, which is confirmed by molecular parameters of catagenesis. The carbonate rocks of the bottom part of the Bazhenov formation in the South Yagunsky area are similar in structure to the main oil-bearing reservoirs of the Salym and Krasnoleninsky fields.

scholarly journals Stable carbon isotopes of dissolved inorganic carbon for a zonal transect across the subpolar North Atlantic Ocean in summer 2014

2016 ◽  
Vol 8 (1) ◽  
pp. 221-233 ◽  
Author(s):  
Matthew P. Humphreys ◽  
Florence M. Greatrix ◽  
Eithne Tynan ◽  
Eric P. Achterberg ◽  
Alex M. Griffiths ◽  
...  
Keyword(s):  
North Atlantic ◽  
Stable Carbon Isotopes ◽  
Inorganic Carbon ◽  
North Atlantic Ocean ◽  
Dissolved Inorganic Carbon ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Research Programme ◽  
Stable Carbon ◽  
Sample Collection

Abstract. The stable carbon isotope composition of dissolved inorganic carbon (δ13CDIC) in seawater was measured in samples collected during June–July 2014 in the subpolar North Atlantic. Sample collection was carried out on the RRS James Clark Ross cruise JR302, part of the “Radiatively Active Gases from the North Atlantic Region and Climate Change” (RAGNARoCC) research programme. The observed δ13CDIC values for cruise JR302 fall in a range from −0.07 to +1.95 ‰, relative to the Vienna Pee Dee Belemnite standard. From duplicate samples collected during the cruise, the 1σ precision for the 341 results is 0.08 ‰, which is similar to our previous work and other studies of this kind. We also performed a cross-over analysis using nearby historical δ13CDIC data, which indicated that there were no significant systematic offsets between our measurements and previously published results. We also included seawater reference material (RM) produced by A. G. Dickson (Scripps Institution of Oceanography, USA) in every batch of analysis, enabling us to improve upon the calibration and quality-control procedures from a previous study. The δ13CDIC is consistent within each RM batch, although its value is not certified. We report δ13CDIC values of 1.15 ± 0.03 ‰ and 1.27 ± 0.05 ‰ for batches 141 and 144 respectively. Our JR302 δ13CDIC data can be used – along with measurements of other biogeochemical variables – to constrain the processes that control DIC in the interior ocean, in particular the oceanic uptake of anthropogenic carbon dioxide and the biological carbon pump. Our δ13CDIC results are available from the British Oceanographic Data Centre – doi:10.5285/22235f1a-b7f3-687f-e053-6c86abc0c8a6.

scholarly journals PREDICTION OF THE LITHOLOGICAL COMPOSITION OF THE BAZHENOV FORMATION BASED ON INTEGRATED INTERPRETATION OF GEOLOGICAL AND GEOPHYSICAL MATERIALS (ON THE EXAMPLE OF CROSS-SECTIONS IN THE NORTHERN REGIONS OF KHANTY-MANSI AUTONOMOUS AREA)

2021 ◽  
Vol 2 (1) ◽  
pp. 291-300
Author(s):  
Mikhail A. Fomin ◽  
Rashid M. Saitov ◽  
Elena A. Kostyreva ◽  
Svetlana V. Rizhkova ◽  
Inga S. Sotnich ◽  
...  
Keyword(s):  
Cross Sections ◽  
Western Siberia ◽  
Component Composition ◽  
Core Material ◽  
Mineral Component ◽  
Bazhenov Formation ◽  
Northern Regions ◽  
Integrated Interpretation ◽  
Lithological Composition ◽  
Khanty Mansi Autonomous

The article presents a methodology developed by the authors for calculating the lithological composition of the Bazhenov Formation in Western Siberia. It is based on the identified relationships between the mineral-component composition and physical properties of rocks. The physical meaning of the identified connections has been substantiated. Satisfactory convergence of the calculated values and core data is shown. Possibilities of using the developed technique in wells not characterized by core material and limitations for its application are described.

Combining leaf gas-exchange and stable carbon isotopes to assess mycoheterotrophy in three species of Pyroleae

Botany ◽  
2017 ◽  
Vol 95 (11) ◽  
pp. 1071-1080 ◽  
Author(s):  
Rebecca Bowler ◽  
Hugues B. Massicotte ◽  
Arthur L. Fredeen
Keyword(s):  
Gas Exchange ◽  
Stable Carbon Isotopes ◽  
Isotope Composition ◽  
Leaf Gas Exchange ◽  
Stable Carbon Isotope ◽  
Stable Carbon ◽  
Gas Exchange Parameters ◽  
Nutritional Mode ◽  
Chimaphila Umbellata ◽  
Exchange Parameters

Determining the extent of mycoheterotrophy (MH) in plants, primarily through the use of stable isotope methods, has gained considerable attention in the last decade. The aim of this study was to characterize the rates of photosynthesis (PS) and several gas-exchange parameters, as well as stable carbon isotope composition (δ13C) of partially mycoheterotrophic (PMH) Pyroleae compared with autotrophic reference species of Ericaceae. An end-member mixing model was applied to δ13C, deriving estimates of % C gained via fungi (CDF). The δ13C was significantly enriched for Orthilia secunda and Pyrola chlorantha (relative to autotrophs) resulting in estimates of CDF ranging from 13.8% to 20.8%. Despite significantly lower PS rates for O. secunda and P. chlorantha, as well as lower conductance and transpiration, there were no significant differences in the Ci:Ca ratios across all of the species, suggesting that the C isotope inferences for these two species were reflective of fungal C gains. By contrast, results for all of the variables indicated primarily autotrophic C nutrition for Chimaphila umbellata. Further studies, such as isotope labelling experiments or assessments of biochemical constraints to autotrophy, may resolve the uncertainties in these species, allowing more accurate understanding of the complex nutritional mode of these plants.

scholarly journals Stable Carbon Isotopes in Zea mays

2018 ◽  
Author(s):  
Robert J. Twohey ◽  
Lucas M. Roberts ◽  
Anthony J. Studer
Keyword(s):  
Zea Mays ◽  
Carbon Isotopes ◽  
Water Use ◽  
Stable Carbon Isotopes ◽  
Carbon Fixation ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Climate Change Scenarios ◽  
Transpiration Efficiency ◽  
Stable Carbon

SummaryThe increasing demand for food production and predicted climate change scenarios highlight the need for improvements in crop sustainability. The efficient use of water will become increasingly important for rainfed agricultural crops even in fertile regions that have historically received ample precipitation. Improvements in water-use efficiency in Zea mays have been limited, and warrants a renewed effort aided by molecular breeding approaches. Progress has been constrained by the difficulty of measuring water-use in a field environment. The stable carbon isotope composition (δ13C) of the leaf has been proposed as an integrated signature of carbon fixation with a link to stomatal conductance. However, additional factors affecting leaf δ13C exist, and a limited number of studies have explored this trait in Z. mays. Here we present an extensive characterization of leaf δ13C in Z. mays. Significant variation in leaf δ13C exists across diverse lines of Z. mays, which we show to be heritable across several environments.Furthermore, we examine temporal and spatial variation in leaf δ13C to determine the optimum sampling time to maximize the use of leaf δ13C as a trait. Finally, our results demonstrate the relationship between transpiration and leaf δ13C in the field and the greenhouse. Decreasing transpiration and soil moisture are associated with decreasing leaf δ13C. Taken together these results outline a strategy for using leaf δ13C and reveal its usefulness as a measure of transpiration efficiency under well-watered conditions rather than a predictor of performance under drought.Significance StatementThis study identifies sources of variation in stable carbon isotopes of maize leaves and establishes the framework for connecting leaf δ13C and transpiration efficiency.

scholarly journals Stable carbon isotopes of dissolved inorganic carbon for a zonal transect across the subpolar North Atlantic Ocean in summer 2014

2016 ◽  
Author(s):  
Matthew P. Humphreys ◽  
Florence M. Greatrix ◽  
Eithne Tynan ◽  
Eric P. Achterberg ◽  
Alex M. Griffiths ◽  
...  
Keyword(s):  
North Atlantic ◽  
Stable Carbon Isotopes ◽  
Inorganic Carbon ◽  
North Atlantic Ocean ◽  
Dissolved Inorganic Carbon ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Research Programme ◽  
Stable Carbon ◽  
Sample Collection

Abstract. The stable carbon isotope composition of dissolved inorganic carbon (δ13CDIC) in seawater was measured in samples collected during June—July 2014 in the subpolar North Atlantic. Sample collection was carried out on the RRS James Clark Ross cruise JR302, part of the "Radiatively Active Gases from the North Atlantic Region and Climate Change" (RAGNARoCC) research programme. The observed δ13CDIC values for cruise JR302 fall in a range from 0.07 ‰ to +1.95 ‰, relative to the Vienna Peedee Belemnite standard. From duplicate samples collected during the cruise, the 1σ precision for the 341 results is 0.08 ‰, which is similar to our previous work and other studies of this kind. We also performed a cross-over analysis using nearby historical δ13CDIC data, which indicated that there were no significant systematic offsets between our measurements and previously published results. We also included seawater reference material (RM) produced by A. G. Dickson (Scripps Institution of Oceanography, USA) in every batch of analysis, enabling us to improve upon the calibration and quality-control procedures from a previous study. The δ13CDIC is consistent within each RM batch, although its value is not certified. We report δ13CDIC values of 1.15 ± 0.03 ‰ and 1.27 ± 0.05 ‰ for batches 141 and 144 respectively. Our JR302 δ13CDIC data can be used – along with measurements of other biogeochemical variables – to constrain the processes that control DIC in the interior ocean, in particular the oceanic uptake of anthropogenic carbon dioxide and the biological carbon pump. Our δ13CDIC results are available from the British Oceanographic Data Centre – doi:10.5285/22235f1a-b7f3-687f-e053-6c86abc0c8a6.

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