scholarly journals KEROGEN TYPES OF BAZHENOV FORMATION BASED ON PYROLYSIS DATA AND THEIR COMPARISON WITH OIL PARAMETERS

2017 ◽  
pp. 34-43
Author(s):  
E. E. Oksenoyd ◽  
V. A. Volkov ◽  
E. V. Oleynik ◽  
G. P. Myasnikova
Keyword(s):  
Organic Matter ◽  
Lower Cretaceous ◽  
Alternative Model ◽  
Oil And Gas ◽  
Upper Jurassic ◽  
Gas Content ◽  
Basin Modeling ◽  
Bazhenov Formation ◽  
Gas Bearing

Based on pyrolytic data (3 995 samples from 208 wells) organic matter types of Bazhenov Formation are identified in the central part of Western Siberian basin. Zones of kerogen types I, II, III and mixed I-II and II-III are mapped. Content of sulfur, paraffins, resins and asphaltenes, viscosity, density, temperature and gas content in oils from Upper Jurassic and Lower Cretaceous sediments (3 806 oil pools) are mapped. Oil gradations are identified and distributed. The alternative model of zones of kerogen II and IIS types is presented. The established distributions of organic matter types can be used in basin modeling and in assessment of oil-and-gas bearing prospects.

scholarly journals Oil and gas content of the understudied part in the northwest of the Timan-Pechora oil and gas province according to the results of basin modeling

2021 ◽  
Vol 247 ◽  
pp. 66-81
Author(s):  
Oleg Prishchepa ◽  
Ivan Borovikov ◽  
Evgenii Grokhotov
Keyword(s):  
Oil And Gas ◽  
Water Area ◽  
Seismic Facies ◽  
Gas Content ◽  
Basin Modeling ◽  
The North ◽  
Industrial Oil ◽  
Deep Wells ◽  
Gas Potential ◽  
Gas Bearing

Comprehensive interpretation of the results for regional seismic operations and reinterpretation of archived seismic data, their correlation with the drilling data of more than 30 deep wells, including Severo-Novoborsk parametric well, made it possible to clarify the structural maps and thickness maps of all seismic facies structures developed in the territory and water area in the junction of the north of Izhma-Pechora depression and Malozemelsko-Kolguevsk monocline of Timan-Pechora oil and gas province. Data obtained were used at basin modeling in TemisFlow software in order to reconstruct the conditions of submersion and transformation of organic substance in potential oil and gas bearing formations. Modeling made it possible to get an idea of ​​the time and conditions for the formation of large zones of possible hydrocarbons accumulation, to establish space-time connections with possible sources of generation, to identify the directions of migration and on the basis of comparison with periods of intense generation, both from directly located within the operation area and outside them (taking into account possible migration), to identify zones of paleoaccumulation of oil and gas. Work performed made it possible to outline promising oil and gas accumulation zones and identify target objects for further exploration within the site with an ambiguous forecast and lack of industrial oil and gas potential.

Basin Modeling as a Tool for Research of Regional Oil and Gas Generation Processes and the Possibility of Replacement of Oil and Gas Riches Illustrated through Traygorodsko-Kondakovskoye Oil Field

2021 ◽  
Author(s):  
Vladimir Andreevich Zubkov ◽  
Pavel Vladimirovich Molodykh ◽  
Ivan Vasilievich Goncharov ◽  
Vadim Valerievich Samoilenko ◽  
Svetlana Vasilievna Fadeeva
Keyword(s):  
Organic Matter ◽  
Source Rock ◽  
Oil And Gas ◽  
Oil Field ◽  
Source Rocks ◽  
Material Base ◽  
Basin Modeling ◽  
Hydrocarbon Migration ◽  
Bazhenov Formation ◽  
Gas Source

Abstract The article presents the results of two-year of research aimed at replenishing the resource and raw material base of the northwestern part of the Tomsk region. The practical application possibilities of basin modeling at the prospecting and exploratory stages of geological study of the subsurface are illustrated. The research was divided into two phases. The first of them has sub-regional coverage and includes an area of 25,000 km2 bounded by the Chkalovsky oil and gas condensate field in the southeast and the administrative boundaries of Tomsk Oblast in the northwest. The section is confined to the Alexandrovsky arch, covers part of the Koltogorsko-Nyurolsky chute and the eastern periclinal of the Nizhnevartovsky arch. At the first stage, a three-dimensional model of oil-and-gas bearing basin formation was created, the tasks of which were to replenish the history of generation and formation of ideas about the ways of hydrocarbon migration. The basin submergence has been reconstructed here and the thermal flow history has been restored. The uneven intensity of heat flow at the bottom of the sedimentary cover over the area is explained by tectonic processes and is complicated by a massive granitoid intrusion. In JSC "Tomsk Petroleum institute", the knowledge base of geochemical features of oil-and-gas source rocks and oils of Western Siberia was formed for years, which allowed to use their own kinetic spectra for the surveyed region. To calibrate the paleotemperatures, both the optical characteristics of vitrinite coals and the indicators of the geochemical properties of organic matter of the Bazhenov formation (4/1 MDBT and Tmax) were used. As a result, the conclusion about the presence of two generation centers of different nature was made, the time and volume of oil generation by organic matter of the Bazhenov formation were predicted. Next, the modeling parameters of hydrocarbon migration and accumulation are described. Modeling shows that the primary migration occurs due to the emergence of abnormally high pore pressure during the generation of hydrocarbons and fluid autofracture of the oil and gas source rock. The results of calculations of secondary migration by two different methods are compared. Despite a number of limitations, the results obtained show a fairly high convergence to real data. At the second stage, on the basis of the regional (parent) model a local daughter model of the formation of the Traygorodsko-Kondakovskoye field within the area of 480 km2 covered by 3D seismic exploration was plotted. The rationale for the necessity and description of the results of additional special geochemical studies of fluids and oil source rock, carried out before starting to build a detailed model of the local stage, is given. The article outlines the basic parameters and gives the differences between the local model and the parent model. Conclusions are made about the possibility of assessing the conductive properties of fault in the formation of deposits. The prediction of trap saturation and resource potential assessment is the result, the achievement of which reduced the risks of geological exploration and formed the recommendations for further geological study of the subsurface.

scholarly journals Variability in the composition of hydrocarbon compounds in the Jurassic oil-and-gas-bearing strata of the Kamennaya crest of the Krasnoleninsky arch (Western Siberia)

Georesursy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 158-169
Author(s):  
Margarita S. Tikhonova ◽  
Anton G. Kalmykov ◽  
Daria A. Ivanova ◽  
Olesia N. Vidishcheva ◽  
Inna O. Khomyachkova ◽  
...  
Keyword(s):  
Organic Matter ◽  
Western Siberia ◽  
Oil And Gas ◽  
Structural Features ◽  
Unconventional Reservoirs ◽  
Bazhenov Formation ◽  
Area Of Interest ◽  
Structural Plan ◽  
And Migration ◽  
Gas Bearing

The article presents the results of hydrocarbon compounds extracted from open pores and blocked by resinous-asphaltene compounds pores in the Tutleim formation rocks (a stratigraphic analogue of the Bazhenov formation) and the underlying Jurassic deposits on the territory of the Kamennaya crest of the Krasnoleninsky arch investigation. The aim of the work was both to study the possible migration of hydrocarbons along the section and area and to assess the variability of the bitumen composition in rocks relative to the structural plan of the area of interest, along the section, as well as unconventional reservoirs. It is shown that the structural features and the assumed additional heating of the rocks lead to variety in the hydrocarbons composition not only in open, but also in blocked pores, both through the area of Tutleim formation distribution and in different intervals of one well. It was established that in the sediments organic matter, which may slightly differ in nature within the formation, can accumulate, and this leads to some differences in the generation, accumulation and migration of hydrocarbon compounds processes. It is shown that the process of migration of hydrocarbons from the underlying sediments also affects the bitumen composition in the rocks of the Tutleim formation.

Comparison of Organic Matter from Upper Jurassic Oil Shale of the East European Platform and the Bazhenov Formation by Molecular and Isotopic Data

2018 ◽  
Vol 480 (1) ◽  
pp. 611-614
Author(s):  
D. A. Bushnev ◽  
N. S. Burdelnaya ◽  
I. V. Goncharov ◽  
V. V. Samoylenko ◽  
M. A. Veklich
Keyword(s):  
Organic Matter ◽  
East European Platform ◽  
Oil Shale ◽  
Upper Jurassic ◽  
Isotopic Data ◽  
Bazhenov Formation ◽  
East European

scholarly journals SEPARATE QUANTITATIVE PREDICTION OF OIL AND GAS CONTENT PROSPECTS FOR DZHEBOL STAGE PALEOZOIC DEPOSITS OF TIMAN-PECHORA OIL AND GAS BASIN

2015 ◽  
pp. 9-15
Author(s):  
A. I. Diyakonov ◽  
L. V. Parmuzina ◽  
S. V. Kochetov ◽  
A. Yu. Malikova
Keyword(s):  
Oil And Gas ◽  
Sedimentary Basin ◽  
Scientific Basis ◽  
Source Rocks ◽  
Gas Content ◽  
Quantitative Prediction ◽  
Oil And Gas Resources ◽  
Gas Bearing

It is shown that the evolutionary-catagenetic model for calculating the initial potential hydrocarbon resources can serve as a scientific basis for the separate quantitative prediction of areas of oil-and-gas content. In this case retrospectively evaluated are the scales of generation and accumulation of hydrocarbons in the source rocks during catagenetic evolution of sedimentary basin. The authors propose a method, the results of evaluation of generation and accumulation scales and initial potential oil and gas resources for major oil-and-gas bearing complexes of Dzhebol stage.

scholarly journals Upper Jurassic subsalt complex of the Terek-Caspian trough due to oil and gas content

2019 ◽  
Vol 350 ◽  
pp. 012026
Author(s):  
T Kh Bachaeva ◽  
A A Daukaev ◽  
I A Kerimov ◽  
A A Shaipov
Keyword(s):  
Oil And Gas ◽  
Upper Jurassic ◽  
Gas Content

Glendonites from Mesozoic succession of eastern Barents sea: distribution, genesis and paleoclimatic implications

2020 ◽  
Author(s):  
Kseniya Mikhailova ◽  
Victoria Ershova ◽  
Mikhail Rogov ◽  
Boris Pokrovsky ◽  
Oleg Vereshchagin
Keyword(s):  
Organic Matter ◽  
Calcium Carbonate ◽  
Sulfate Reduction ◽  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Middle Jurassic ◽  
Barents Sea ◽  
Upper Jurassic ◽  
Anaerobic Oxidation Of Methane ◽  
Oxidation Of Methane

<p>Glendonites often used as paleoclimate indicator of cold near-bottom temperature, as these are calcite pseudomorphs of ikaite, a metastable calcium carbonate hexahydrate, precipitates mostly under low temperature (mainly from 0-4<sup>o</sup>C) and may be stabilized by high phosphate concentrations that occurs due to anaerobic oxidation of methane and/or organic matter; dissolved organic carbon, sulfates and amino acid may contribute ikaite formation as well.  Therefore, glendonites-bearing host rocks frequently include glacial deposits that make them useful as a paleoclimate indicator of near-freezing temperature.</p><p>Our study is based on material collected from five wells drilled in eastern Barents Sea: Severo-Murmanskaya, Ledovaya – 1,2; Ludlovskaya – 1,2. The studied glendonites, mainly represented by relatively small rhombohedral pseudomorphs (0,5-2 cm) and rarely by stellate aggregates, collected from Middle Jurassic to Lower Cretaceous shallow marine clastic deposits. They scattered distributed throughout succession. Totally 18 samples of glendonites were studied. The age of host-bearing rocks were defined by fossils: bivalves or ammonites, microfossils or dinoflagellate. Bajocian-Bathonian glendonites were collected from Ledovaya – 1 and Ludlovskaya – 1 and 2 wells; in addition to these occurrences Middle Jurassic glendonites are known also in boreholes drilled at Shtockmanovskoe field. Numerous ‘jarrowite-like’ glendonites of the Middle Volgian (~ latest early Tithonian) age were sampled from Severo-Murmanskaya well. Unique Late Barremian glendonites were found in Ledovaya – 2 well.</p><p>δ<sup>18</sup>O values of Middle Jurassic glendonite concretions range from – 5.4 to –1.7 ‰ Vienna Pee Dee Belemnite (VPDB); for Upper Jurassic – Lower Cretaceous δ<sup>18</sup>O values range from – 4.3 to –1.6 ‰ VPDB; for Lower Cretaceous - δ<sup>18</sup>O values range from – 4.5 to –3.4 ‰ VPDB. Carbon isotope composition for Middle Jurassic glendonite concretions δ<sup>13</sup>C values range from – 33.3 to –22.6 ‰ VPDB; for Upper Jurassic – Lower Cretaceous δ<sup>13</sup>C values range from – 25.1 to –18.4 ‰ VPDB; for Lower Cretaceous - δ<sup>13</sup>C values range from – 30.1 to –25.6 ‰ VPDB.</p><p>Based on δ<sup>18</sup>O data we supposed that seawater had a strong influence on ikaite-derived calcite precipitation. Received data coincide with δ<sup>18</sup>O values reported from other Mesozoic glendonites and Quaternary glendonites formed in cold environments. Values of δ<sup>13</sup>C of glendonites are close to bacterial sulfate reduction and/or anaerobic oxidation of methane or organic matter. Glendonites consist of carbonates forming a number of phases which different in phosphorus and magnesium content. Mg-bearing calcium carbonate and dolomite both include framboidal pyrite, which can indicate (1) lack of strong rock transformations activity and (2) presence of sulfate-reduction bacteria in sediments.</p><p>To conclude, Mesozoic climate was generally warm and studied concretions indicate cold climate excursion in Middle Jurassic, Upper Jurassic-Early Cretaceous and Early Cretaceous.</p><p> </p><p>The study was supported by RFBR, project number 20-35-70012.</p>

Sign in / Sign up

Export Citation Format

Share Document