Seismogeological characteristics and oil-and-gas prospects of the cambrian sediments within the Vilyui hemisyneclise

2020 ◽  
Author(s):  
Igor A. Gubin ◽  
◽  
Alexey E. Kontorovich ◽  
Andrey M. Fomin ◽  
◽  
...  
Keyword(s):  
Seismic Data ◽  
Structural Model ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Data Interpretation ◽  
Hydrocarbon Generation ◽  
Deep Drilling ◽  
Middle Cambrian ◽  
Seismic Surveys ◽  
Gas Source

Based on geological and geophysical data, such as deep drilling, well logging, seismic surveys CDP-2D, DSS, SK-VSP a sedimentary cover structural model of the Vilyui hemisineclise to the lower Cambrian roof is constructed. According to seismic data interpretation, the ubiquitous development of the oil and gas source Kuonamka formation is predicted within the internal boundaries of the Vilyui hemisyneclise, where it formed an extensive center of hydrocarbon generation. Clinoform-built Middle Cambrian rocks (Maysky stage) overlie Kuonamka formation. The reservoirs development in the Maysky stage rocks is substantiated, a forecast map of porosity coefficients is generated.

NEW THINKING ON THE PETROLEUM PROSPECTIVITY OF DEEP MESOZOIC SEDIMENTS IN NEW ZEALAND BASINS

1999 ◽  
Vol 39 (1) ◽  
pp. 386 ◽  
Author(s):  
R.A. Cook ◽  
R.C. Gregg ◽  
D.J. Bennett
Keyword(s):  
New Zealand ◽  
Seismic Data ◽  
Oil And Gas ◽  
Good Source ◽  
Seismic Surveys ◽  
South Basin ◽  
Sedimentary Sequences ◽  
Gas Source ◽  
New Thinking ◽  
Geochemical Studies

Geochemical studies, reinterpretation of early seismic data and information from new seismic surveys are extending the concept of economic basement for hydrocarbons in several New Zealand basins. Older Cretaceous and even Jurassic and Triassic rocks, previously considered to be 'basement' by petroleum explorationists, may have significance as petroleum prospects.Triassic–Jurassic Murihiku Supergroup sedimentary sequences are up to 15 km thick, and the upper parts are still of low metamorphic rank. Vitrinite reflectances and Hydrogen Indexes from Murihiku Supergroup coals sampled from outcrop and drillholes indicate good oil potential, and, together with rock porosity of up to 18%, suggest that the Murihiku Supergroup may be prospective.In the offshore Canterbury Basin, reinterpretation of seismic data has shown there is probably a thick sedimentary section below what was previously mapped as the regional basement horizon. This seismic interval can be related to a similar section developed in the adjacent Great South Basin where a mid-Cretaceous, rift- fill section of hydrocarbon-bearing rocks, drilled in the Kawau–1 well had good source and reservoir potential.In the onshore Canterbury Basin, a recent vibroseis survey has revealed apparent sedimentary section extending down to more than 4,000 m which might also be the expression of a mid-Cretaceous rift-fill section, similar to that in the nearby Great South Basin and in the formerly adjacent Taranaki Basin, or possibly the older Murihiku Supergroup. This potential for a mature oil and gas source section provides the basis for further exploration of the area.There are similar prospective sequences in several other New Zealand basins.

REFINEMENT OF THE STRUCTURE OF THE VILYUY HEMISYNECLISE BASED ON THE RESULTS OF REINTERPRETATION OF SEISMIC EXPLORATION

2020 ◽  
pp. 40-52
Author(s):  
I. A. Gubin ◽  
Keyword(s):  
Seismic Data ◽  
Structural Model ◽  
Rift Zone ◽  
Sedimentary Cover ◽  
Velocity Model ◽  
Seismic Facies ◽  
Seismic Exploration ◽  
Deep Drilling ◽  
Cover Up ◽  
Inner Parts

The article analyzes the deep drilling data and results of seismic CDP operations performed within the Vilyuy hemisyneclise from the 1980s to the present. Seismogeological conditions are characterized. The structural model of sedimentary cover up to the top of the Lower Cambrian is developed. 5 seismic sequences are identified, maps of their thicknesses are presented. Proveniances of Mesozoic, Permian, Carboniferous, Devonian, Silurian, Ordovician and Middle-Upper Cambrian deposits are outlined. The structure of the Vilyuy hemisyneclise sedimentary cover is shown on deep seismic-geological sections constructed on the basis of the detailed velocity model, as well as taking into account modern and retrospective geological and geophysical data. The limited development of Devonian deposits in the inner parts of the hemisyneclise is shown, where, according to modern seismic data, the Cambrian is predicted under Carboniferous deposits, and seismic facies characteristic of the Kempendyay rift zone deposits are absent in the wave fields of the pre-Permian part of the section.

Well Logging Data Interpretation in Oil and Gas Source Rock Sections Based on Complex Petrophysical and Geochemical Analysis Results

2018 ◽  
Author(s):  
Rais Khisamov ◽  
Natalya Skibitskaya ◽  
Kazimir Kovalenko ◽  
Venera Bazarevskaya ◽  
Nikita Samokhvalov ◽  
...  
Keyword(s):  
Source Rock ◽  
Oil And Gas ◽  
Data Interpretation ◽  
Well Logging ◽  
Geochemical Analysis ◽  
Gas Source

scholarly journals The structure of the sedimentary complex of the Middle and South Caspian depressions (Azerbaijan sector)

2021 ◽  
Vol 43 (4) ◽  
pp. 199-216
Author(s):  
N.P. Yusubov ◽  
I.S. Guliyev
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Clay Content ◽  
Geological Structure ◽  
Point Of View ◽  
South Caspian Basin ◽  
Origin And Evolution ◽  
Geological Interpretation ◽  
High Degree

The high degree of knowledge of the upper horizons of the sedimentary cover of the Middle and South Caspian depressions, given an insufficient increase in hydrocarbon reserves, leads to the need for a detailed approach to the search for oil and gas deposits in deep-seated sediments (over 6 km). During the geological interpretation of new highly informative seismic data, as well as data of deep drilling and petrological core studies, there were revealed obvious shortcomings in the concepts of the origin and evolution of the Middle and South Caspian depressions. These ideas misinterpret evolution, especially the South Caspian Basin, which is characterized by a number of unique features: very thick sedimentary cover (up to 22 km), extremely high sedimentation rate, low heat flow and reservoir temperatures, abnormally high pore and reservoir pressures, high clay content of the section, etc. The main purpose of the study was to elucidate the regional structure and features of the dissection of the sedimentary cover of the Middle and South Caspian depressions, the conditions of occurrence and distribution of facies and thicknesses of individual complexes of deposits. The paper analyzes the results of some previous studies of the geological structure of the Middle and South Caspian depressions based on the data of deep seismic sounding, seismological and gravimetric observations. We consider the main conclusions of these studies, about the geological structure of the sedimentary complex of the region’s, very outdated and subject to revision. The results of seismic stratigraphic analysis of seismic data allowed the authors to identify new data about the tectonic structure and express a completely different point of view regarding the structure of the sedimentary cover in the region. The work also touches on the issue associated with the tectonics of the region and the alleged subduction zone here.

scholarly journals Hydrocarbon systems of the Crimean-Caucasian segment of the Alpine folded system

Georesursy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 21-33
Author(s):  
Vagif Kerimov ◽  
Nurdin Yandarbiev ◽  
Rustam Mustaev ◽  
Andrey Kudryashov
Keyword(s):  
Oil And Gas ◽  
Foreland Basin ◽  
Gas Content ◽  
Hydrocarbon Generation ◽  
Gas Source ◽  
Coal Petrology ◽  
Geochemical Studies ◽  
Cenozoic Sediments ◽  
Oil Formation ◽  
Residual Potential

The article is devoted to the generation and accumulation systems in the territory of the Crimean-Caucasian segment of the Alpine folded system. An area of prolonged and stable sagging in the Mesozoic and Cenozoic – the Azov-Kuban Trough, which is a typical foreland basin – is distinguished within this segment. According to the results of geological and geochemical studies and modelling, depocentres are identified in this area, consolisated in four generative and accumulative hydrocarbon systems: Triassic-Jurassic, Cretaceous, Eocene and Maikop. Chemical-bitumenological, pyrolytic and coal petrology analysis of rock samples were carried out to assess geochemical conditions of oil and gas content in Meso-Cenozoic sediments. The modelling results made it possible to study and model the elements and processes of hydrocarbon systems in the Meso-Cenozoic in the Western Crimean-Caucasian region. It has been established that the extended catagenetic zoning is typical for these areas, which is caused by high rates of sedimentation and sagging, and large thicknesses of oil-bearing sediments in the source of oil formation, accordingly. The degree of organic matter depletion characterized the residual potential of the oil and gas source strata, was investigated. It is important for predicting and assessing the possibility of hydrocarbon generation.

scholarly journals Formation conditions and evolution of oil and gas source strata of the Laptev sea shelf ore and gas province

2021 ◽  
pp. 46-59
Author(s):  
V. Yu. Kerimov ◽  
Yu. V. Shcherbina ◽  
A. A. Ivanov
Keyword(s):  
Oil And Gas ◽  
Numerical Models ◽  
Sedimentary Basins ◽  
Water Area ◽  
Source Rocks ◽  
Gas Content ◽  
Laptev Sea ◽  
Hydrocarbon Generation ◽  
Gas Source ◽  
The Laptev Sea

Introduction. To date, no unified well-established concepts have been developed regarding the oil and gas geological zoning of the Laptev Sea shelf, as well as other seas of the Eastern Arctic. Different groups of researchers define this region either as an independently promising oil and gas region [7, 8], or as a potential oil and gas basin [1].Aim. To construct spatio-temporal digital models of sedimentary basins and hydrocarbon systems for the main horizons of oil and gas source rocks. A detailed analysis of information on oil and gas content, the gas chemical study of sediments, the characteristics of the component composition and thermal regime of the Laptev sea shelf water area raises the question on the conditions for the formation and evolution of oil and gas source strata within the studied promising oil and gas province. The conducted research made it possible to study the regional trends in oil and gas content, the features of the sedimentary cover formation and the development of hydrocarbon systems in the area under study.Materials and methods. The materials of production reports obtained for individual large objects in the water area were the source of initial information. The basin analysis was based on a model developed by Equinor specialists (Somme et al., 2018) [14—17], covering the time period from the Triassic to Paleogene inclusive and taking into account the plate-tectonic reconstructions. The resulting model included four main sedimentary complexes: pre-Aptian, Apt-Upper Cretaceous, Paleogene, and Neogene-Quaternary.Results. The calculation of numerical models was carried out in two versions with different types of kerogen from the oil and gas source strata corresponding to humic and sapropel organic matter. The results obtained indicated that the key factor controlling the development of hydrocarbon systems was the sinking rate of the basins and the thickness of formed overburden complexes, as well as the geothermal field of the Laptev Sea.Conclusion. The analysis of the results obtained allowed the most promising research objects to be identified. The main foci of hydrocarbon generation in the Paleogene and Neogene complexes and the areas of the most probable accumulation were determined. Significant hydrocarbon potential is expected in the Paleogene clinoforms of the Eastern Arctic.

scholarly journals CORRELATION RESULTS OF THE PROTEROZOIC-PHANEROZOIC SECTIONS OF THE ALDAN-MAYA OIL AND GAS BEARING REGION ON DEEP DRILLING DATA

2021 ◽  
Vol 2 (1) ◽  
pp. 102-110
Author(s):  
Larisa N. Konstantinova ◽  
Igor A. Gubin ◽  
Sergey A. Moiseev ◽  
Andrey M. Fomin ◽  
Elena N. Kuznetsova
Keyword(s):  
Oil And Gas ◽  
Stratigraphic Correlation ◽  
Controversial Issues ◽  
Well Log ◽  
Deep Drilling ◽  
Seismic Surveys ◽  
Drilling Data ◽  
Core Description ◽  
Gas Bearing

The article discusses the controversial issues of well log correlation of the Riphean, Vendian, Cambrian and Mesozoic sequences, which is prospects for oil and gas within the Aldan-Maya petroleum region. The author's version of the stratigraphic correlation is based on the interpretation of logging data, seismic surveys, core description, archival and published materials. The results obtained can be used for stratigraphic picks correction and structural maps plotting.

scholarly journals Conditions of oil and gas formation in the territory of the Eastern and Central Ciscaucasia

2020 ◽  
pp. 63-72
Author(s):  
D. D. Ismailov ◽  
S. G. Serov ◽  
R. N. Mustaev ◽  
A. V. Petrov
Keyword(s):  
Phase Composition ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Research Area ◽  
Hydrocarbon Generation ◽  
Program Complex ◽  
Basin Modelling ◽  
The North ◽  
Gas Formation ◽  
Hydrocarbon Saturation

The results of studies of hydrocarbon systems of the Eastern and Central Ciscaucasia are shown. The research area covers part of the Scythian platform, namely, the northern side of the Terek-Caspian foredeep, the north-eastern part of the East Kuban depression, the Tersko-Kum depression and the Stavropol arch. Based on the results of the work and basin modelling of hydrocarbons generation, emigration and accumulation processes, the reconstruction of the history of oil and gas formation and oil and gas accumulation in the sedimentary cover of the region was completed. The basin modelling of hydrocarbon formation processes in Central and Eastern Ciscaucasia was carried out using the PetroMod (Schlumberger) program complex. The obtained results made it possible to determine the dynamics of organic substance transformation processes, evolution of oil and gas formation zones, time and expected paths of hydrocarbon migration and phase composition and degree of hydrocarbon saturation of the section. The model reliability was corrected by comparing the values of benchmarks (modern reservoir temperatures measured in wells, with their calculated values obtained as a result of modelling). The location of possible foci of hydrocarbon generation in the sedimentary cover, the migration paths, the phase composition of hydrocarbons, the intensity of hydrocarbon saturation within individual tectonic zones and structures were determined. It has been established that the main foci of hydrocarbon generation in the southern part of the studied region are located in the Chechen depression (Tersko-Caspian deep), on the platform part–in the zone of the Manych deep and Nogai stage.

HYDROCARBON GENERATION IN THE AMADEUS BASIN, CENTRAL AUSTRALIA

1984 ◽  
Vol 24 (1) ◽  
pp. 42
Author(s):  
K. S. Jackson D. M. McKirdy ◽  
J. A. Deckelman
Keyword(s):  
Oil And Gas ◽  
Source Rocks ◽  
Hydrocarbon Generation ◽  
Liquid Hydrocarbons ◽  
Gas Source ◽  
Organic Facies ◽  
Hydrocarbon Fields ◽  
Central Australia ◽  
Oil Source ◽  
To Receive

The Proterozoic to Devonian Amadeus Basin of central Australia contains two hydrocarbon fields — oil and gas at Mereenie and gas at Palm Valley, both within Ordovician sandstone reservoirs. Significant gas and oil shows have also been recorded from Cambrian sandstones and carbonates in the eastern part of the basin. The hydrocarbon generation histories of documented source rocks, determined by Lopatin modelling, largely explain the distribution of the hydrocarbons. The best oil and gas source rocks occur in the Ordovician Horn Valley Siltstone. Source potential is also developed within the Late Proterozoic sequence, particularly the Gillen Member of the Bitter Springs Formation, and the Cambrian.Consideration of organic maturity, relative timing of hydrocarbon generation and trap formation, and oil/source typing leads to the conclusion that the Horn Valley Siltstone charged the Mereenie structure with gas and oil. At Palm Valley, only gas and minor condensate occur because the trap was formed too late to receive an oil charge. Differences in organic facies may also, in part, account for the dry gas and lack of substantial liquid hydrocarbons at Palm Valley. In the eastern Amadeus Basin, the Ordovician is largely absent but Proterozoic sources are well placed to provide the gas discovered by Ooraminna 1 and Dingo 1. Any oil charge here would have preceded trap development.

Burial History, Hydrocarbon Generation, and Migration in the Upper Paleogene Petroleum System of the Offshore North Sumatra Basin: Insights from 1D and 2D Basin Modeling.

2021 ◽  
Author(s):  
H. Lazuardi
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Vitrinite Reflectance ◽  
Andaman Sea ◽  
Indian Plate ◽  
Hydrocarbon Generation ◽  
Basin Modeling ◽  
Burial History ◽  
Eurasian Plate ◽  
And Migration

One-dimensional and two-dimensional basin modeling can be used to infer the burial history, hydrocarbon generation, and migration of hydrocarbon. In this paper, the study focuses on 1D and 2D basin modeling in North Sumatera Offshore as one of the prolific deep-water basins in Indonesia. The data consists of 5 exploration wells and 2D seismic data that are vitrinite reflectance, rock-eval data, and bottom-hole temperature. Well data’s have been used to calibrate heat flow and thermal evolution of the basin, while 2D seismic data have been used to support the basin modeling. Based on the result, the basin formed by the collision of the Australian Plate with the Eurasian Plate evolved due to block faulting that caused a pull-apart basin. In the Early Oligocene, changes in the movement of the Indian plate also changed tectonics from subduction to strike-slip fault resulting in Andaman Sea rifting. The southern part of the research area was affected by the Andaman Sea rifting, which caused unconformities in the Middle Miocene. The main generating source rock is the Bampo, Belumai, and Baong Formation, which is predominantly consist of Type III kerogen (gas prone) in the north and Type II/III (mix oil and gas prone) in the South. The timing of petroleum generation may have occurred is in the Early Pliocene. The Early oil generation which occurred simultaneously with the seal rock and may have been migrated to the Middle and Late Miocene reservoir through the faults as a vertical migration pathway. The results of this study allow us to improve the hydrocarbon prospect and reduce exploration risks.

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