Prediction of Oil and Gas Occurrence in the Jurassic Reservoirs of the Zone of Junction of the Yenisei–Khatanga and West Siberian Basins

2021 ◽  
Vol 62 (2) ◽  
pp. 173-193
Author(s):  
D.A. Novikov ◽  
E.V. Borisov
Keyword(s):  
Middle Jurassic ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Naphthenic Acids ◽  
Weakly Alkaline ◽  
Study Region ◽  
Gas Saturation ◽  
Gas Occurrence ◽  
Gas Fields ◽  
Favorable Conditions

Abstract —Based on a comprehensive analysis of the geologic structure, hydrogeology, and hydrogeochemistry, we predict oil and gas occurrence in the Jurassic reservoirs of the zone of junction of the Yenisei–Khatanga and West Siberian basins. We have established the regularities of formation of sandstones of the Sigovaya, Malyshevka, Vym, Nadoyakha, Sharapovka, and Zima reservoirs and examined their poroperm properties. The studied Lower and Middle Jurassic deposits, beginning from the Malyshevka reservoir, are characterized by abnormally high formation pressures with an anomaly ratio of up to 1.92. The Jurassic reservoirs bear weakly alkaline, moderately brackish to slightly saline groundwater of Cl Na, Cl–HCO3 Na, and HCO3–Cl Na compositions with TDS = 3.0–23.3 g/dm3. The low-mineralization connate waters determine an inverse vertical hydrogeochemical zoning in the sedimentary cover of the study region. The research data show favorable conditions for the generation and accumulation of hydrocarbon pools. It is shown that the main criteria for oil and gas occurrence are hydrogeochemical (contents of organic compounds, NH4, B, I, Br, naphthenic acids, and benzene; B/Br and HCO3/Cl coefficients), gas (total gas saturation of formation waters, degree of their gas saturation (Kg), and composition of water-dissolved gases), and hydrodynamic (formation pressures and their anomaly ratio (Ka)) indicators. Also, complex anomalies have been revealed in the Jurassic deposits, which trace the gas fields and revealed oil and gas occurrences. The Jurassic reservoirs are most promising for structure-lithologic traps in the peripheral zones of the basin and on the slopes of large positive structures. The Middle Jurassic deposits in the interior of the Yenisei–Khatanga Basin, poorly studied by deep drilling, might also be of interest as potential hydrocarbon pools.

scholarly journals ZONALITY OF WATER-DDISSOLVED GASES IN THE OIL-AND-GAS BEARING SEDIMENTS OF THE NADYM-TAZ INTERFLUVE

2019 ◽  
Vol 2 (1) ◽  
pp. 133-140
Author(s):  
Dmitry Novikov
Keyword(s):  
Middle Jurassic ◽  
Oil And Gas ◽  
Dissolved Gases ◽  
Gas Saturation ◽  
Oil Deposits ◽  
Gas Bearing

The results presented in the work were obtained in the studies of the features and zonality of water-dissolved gases within the boundaries of the oil-and-gas bearing sediments of the Nadym-Taz interfluve. Methane-containing waters with total gas saturation from 0.3 to 5.7 l/l and average CH4 content from 95.5 vol.% in the Aptian-Albian-Senomanian complex to 83.3 vol.% in the Lower and Middle Jurassic complex are developed in the region. With an increase in the depth, an increase in the content of homologues ΣHС (C2H6, C3H8, C4H10, C5H12 and C6H14) occurs from 1.34 vol.% in the Aptian_Albian-Senomanian complex to 11.67 vol.% in the Lower and Middle Jurassic complex. The maximal concentrations of ΣHС up to 30 vol.% were revealed in the lower part of the Neocomian complex in the marginal waters of oil deposits. An increase in CO2 content and a regular decrease in the ΣHС/N2 ratio from 96 in the Aptian-Albian-Senomanian complex to 52 in the Lower and Middle Jurassic complex are observed with an increase in the depth.

scholarly journals Replenishment of oil deposits from the position of a new concept of oil and gas formation

Georesursy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 40-48 ◽  
Author(s):  
Renat Kh. Muslimov ◽  
Irina N. Plotnikova
Keyword(s):  
Oil And Gas ◽  
Deep Structure ◽  
Sedimentary Cover ◽  
Crystalline Basement ◽  
The South ◽  
Gas Saturation ◽  
Oil Reserves ◽  
Long Term Study ◽  
The Earth ◽  
Deep Wells

The article is devoted to the problem of replenishing of oil reserves and considers it (the problem) in the aspect of deep degassing of the Earth. Based on an analysis of the results of a long-term study of the Precambrian crystalline basement in the territory of Tatarstan and adjacent areas, a number of new criteria are formulated that allow us to identify the processes of deep degassing of the Earth within the studied region. The article provides a brief overview of current views on the problem of replenishing oil reserves, considers options for possible sources and the mechanism of replenishment of hydrocarbons in the developed deposits. The arguments in favor of the modern process of deep degassing within the South Tatar arch and adjacent territories are examined, which are unequivocally confirmed by: the dynamics of the hydrochemical parameters of the deep waters of the crystalline basement obtained in the monitoring mode at five deep wells; uneven heat flux and its anomalies, recorded according to many years of research under the guidance of N.N. Khristoforova. The degassing processes are also confirmed by the dynamics of gas saturation of decompressed zones of the crystalline basement recorded in well 20009-Novoelkhovskaya, the dynamics of gas saturation of oil of the sedimentary cover and the composition of the gas dissolved in it, identified by oil studies in piezometric wells located in different areas of the Romashkinskoye field; the seismicity of the territory of Tatarstan, as well as its neotectonic activity. As criteria proving the existence of a process of replenishing the reserves of the developed oil fields of the South Tatar Arch, the features of the deep structure of the earth’s crust according to seismic data, as well as the results of geochemical studies of oils are considered.

Integrated substantiation of the Erema–Chona giant gas–condensate–oil field (Lena–Tunguska petroleum province)

2020 ◽  
Author(s):  
Georgy G. Shemin ◽  
Keyword(s):  
Oil And Gas ◽  
Oil Field ◽  
Gas Condensate ◽  
Structural Elements ◽  
Compelling Evidence ◽  
Oil And Gas Fields ◽  
Gas Fields ◽  
Favorable Conditions

This paper provides compelling evidence for the previously discovered oil and gas fields in the central, most uplifted part of the Nepa–Botuoba anteclise, to be the constituent structural elements of the Erema–Chona giant gas–condensate–oil field. The revealed tectonic, lithological–facies, and geochemical affinities within its limits attest to equally favorable conditions for the formation of oil and gas accumulations.

Geodynamic processes, hydrocarbon migration and their occurrence in geophysics

2021 ◽  
pp. 8-13
Author(s):  
Kh.I. Shekerov ◽  
◽  
◽  
Keyword(s):  
Oil And Gas ◽  
Mechanical Energy ◽  
Sedimentary Cover ◽  
Surface Zone ◽  
Hydrocarbon Migration ◽  
Gas Field ◽  
Near Surface ◽  
Flow Energy ◽  
Oil And Gas Fields ◽  
Gas Fields

The paper shows that in the oil deposits formed in the Earth crust, due to the overpressure hydrocarbon components migration to the sedimentary cover and penetration to the field occur. As a result of vertical hydrocarbon migration in the oil and gas fields, a subvertical zone differing by its physical properties from the environment is formed. Such a subvertical zone affects geophysical, geochemical and logging data as well. Therefore, while migrate to the near-surface zone, hydrocarbons interact with a complex of rocks of sedimentary cover. As a result of impacting of fines forming hydrocarbons with the complex of subsurface rocks, a part of hydrocarbon flow energy transforms into the fluctuations of minor particles of subsurface rocks, and the other one, in the result of atoms and molecules impact - into the irregular molecule motion. A part of mechanical energy of moving particles transforms into another - thermal type of energy, as a result of which the environment gets “warmed”. Herewith, the temperature in near-surface zones differs from environment. Therefore, in the oil and gas fields in subvertical zones a heterogeneous area differing from the environment by geophysical, geochemical and other characteristics is formed. Based on the research data carried out by numerous specialists, it was justified that the changing of geophysical parameters is affected not only by oil-gas field, but near-surface zone as well. This feature is recommended to consider in the analysis of geophysical data.

Significance of Mineralogical and Lithologic-Petrographical Rank in the Ranking of Geological Information

2020 ◽  
Vol 42 (4) ◽  
pp. 33-49
Author(s):  
O.V. CHEPIZHKO ◽  
V.V. YANKO ◽  
V.M. KADURIN ◽  
I.M. NAUMKO ◽  
S.M. SHATALIN
Keyword(s):  
Fluid Flow ◽  
Black Sea ◽  
Bottom Sediments ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Geochemical Characteristics ◽  
The Black Sea ◽  
Flow Parameters ◽  
Geochemical Parameters ◽  
Geological Information

For the first time the importance of mineralogical and lithological-petrographical ranks in the line of geological information ranks is substantiated for implementation of long-term forecasts, standard and non-standard approaches to research of physical and geochemical parameters as a basis of creation of complex system of forecast criteria and prospecting indicators of hydrocarbons within the sedimentary cover of Black sea based on the theory of global fluid-flows derivation. These criteria have different sensitivity to the object (hydrocarbon deposits) and are therefore ranked. The ranking determined the following parameters: 1) seismic data within the object, obtained by the method of deep seismic sounding, RWM SDP; 2) parameters of tectono-geodynamic structures; 3) the main characteristics of sedimentary cover and bedrock; 4) geochemical characteristics; 5) parameters of mineral complexes and fluid inclusions in mineral neoformations; 6) the value of the distribution of meiobenthos. Based on modern views of oil and gas geology, structural-tectonic and lithological-facies criteria are among the main ones. The study of the mineralogical component of sediments is made with using mineralogical, thermobarogeochemical and X-ray spectral methods. Fixation of anomalies of fluid flow at the bottom of the Black Sea as to the distribution of abiotic parameters in order to assess the prospects of oil and gas is determined by structural and tectonic features and high permeability of fluid flow; parameters of mineral complexes (minerals, facies) and genetic connections; heterogeneity of geochemical characteristics of bottom sediments; the presence of hydrocarbon inclusions in authigenic minerals of bottom sediments.

Potential of recovering elements from produced water at oil and gas fields, British Columbia, Canada

CIM Journal ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 195-214
Author(s):  
G. J. Simandl ◽  
C. Akam ◽  
M. Yakimoski ◽  
D. Richardson ◽  
A. Teucher ◽  
...  
Keyword(s):  
British Columbia ◽  
Oil And Gas ◽  
Produced Water ◽  
Oil And Gas Fields ◽  
Gas Fields

Аdaptability of building structures for oil and gas fields

2017 ◽  
pp. 100-103
Author(s):  
A.V. Antonov ◽  
◽  
Yu.V. Maksimov ◽  
A.N. Korkishko ◽  
◽  
...  
Keyword(s):  
Oil And Gas ◽  
Building Structures ◽  
Oil And Gas Fields ◽  
Gas Fields
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