The Jurassic Oil and Gas Source Rocks of Hydrocarbon Deposits in the Eastern Part of the Fukang Depression (Junggar Oil and Gas Basin)

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.

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Assessment of the Generation Potential of the Emsk-Timan Deposits in the Republic of Udmurtiya

Вестник Пермского университета Геология ◽

10.17072/psu.geol.19.4.396 ◽

2020 ◽

Vol 19 (4) ◽

pp. 396-400

Author(s):

E. E. Kozhevnikova ◽

Keyword(s):

Organic Matter ◽

Quantitative Assessment ◽

Oil And Gas ◽

Gas Source ◽

Udmurt Republic ◽

The Republic ◽

Hydrocarbon Deposits ◽

Mixed Mechanism

The article presents materials on the study of the generation potential of the Emsko-Timan deposits of the Udmurt Republic. The study of the conditions of sedimentary accumulation, geochemical facies at the stage of diagenesis was carried out. Quantitative assessment of the generation potential of the studied complex is given, and the density of organic matter of rocks is calculated that made it possible to identify the local zones of distribution of oil and gas source formations. Correlation of oils of the studied complex with oils above and below-lying complexes has been carried out. It was found that the process of generation of hydrocarbon deposits of the studied complex had a mixed mechanism. Probably, this process involved not only the oil and gas source formations of the terrigenous Devonian, but also the oil and gas source formations above and below the complexes.

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Carbonate oil and gas source rocks wettability alteration due to influence of polymer-colloidal drilling mud

Proceedings of OilGasScientificResearchProjects Institute SOCAR ◽

10.5510/ogp2021si200545 ◽

2021 ◽

pp. 17-27

Author(s):

N. A. Skibitskaya ◽

◽

I. O. Burkhanova ◽

M. N. Bolshakov ◽

V. A. Kuzmin ◽

...

Keyword(s):

Surface Properties ◽

Oil And Gas ◽

Pore Space ◽

Space Structure ◽

Source Rocks ◽

Wettability Alteration ◽

Drilling Mud ◽

Rock Samples ◽

Gas Saturation ◽

Gas Source

Evaluation of rock wettability is an important task, since this parameter determines the distribution of water and oil in the reservoirs and their relative and phase permeability. The reliability of evaluation the wettability of rock samples depends on the drilling-in conditions during core sampling and core sample preparation methods. The investigation of the surface properties of the core from the Orenburg oil and gas condensate field showed that using of polymer-colloidal drilling mud leads to hydrophilization of the samples' surface. To obtain information on the actual wettability values of rock samples taken from wells drilled with polymer-colloidal drilling mud a method for estimating the relative (predominant) wettability of rocks based on petrophysical and lithological studies data is proposed. The authors suggest that the extraction of oil and gas source rock samples leads to irreversible changes in surface properties that cannot be restored. Keywords: selective wettability; relative wettability; predominant wettability; polymer-colloidal drilling mud; residual gas saturation; trapped gas saturation; pore space structure; extraction.

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Geochemical characteristics of oil and gas source rocks of the southern part of the Pre-Ural foredeep

Neftyanoe khozyaystvo - Oil Industry ◽

10.24887/0028-2448-2021-5-45-49 ◽

2021 ◽

pp. 45-49

Author(s):

A.S. Monakova ◽

◽

A.V. Osipov ◽

V.I. Ermolkin ◽

L.M. Bondareva ◽

...

Keyword(s):

Oil And Gas ◽

Geochemical Characteristics ◽

Source Rocks ◽

Gas Source

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Abstract: Distribution and Characteristics of Oil and Gas Source Rocks of the Indus Basin, Pakistan

AAPG Bulletin ◽

10.1306/3b05aeb2-172a-11d7-8645000102c1865d ◽

1997 ◽

Vol 81 (1997) ◽

Author(s):

CURIALE, JOSEPH,  WASIM AHMAD,

Keyword(s):

Oil And Gas ◽

Source Rocks ◽

Indus Basin ◽

Gas Source

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EVAPORITES AS OIL AND GAS SOURCE ROCKS

Journal of Petroleum Geology ◽

10.1306/bf9ab641-0eb6-11d7-8643000102c1865d ◽

1985 ◽

Vol 8 ◽

Author(s):

Peter Sonnenfeld*

Keyword(s):

Oil And Gas ◽

Source Rocks ◽

Gas Source

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Hydrocarbon biomarkers and isotopic composition of carbon from bitumoids and oils of Mesozoic sediments in the western part of the Yenisei-Khatanga oil and gas region

Georesursy ◽

10.18599/grs.2019.1.47-63 ◽

2019 ◽

Vol 21 (1) ◽

pp. 47-63

Author(s):

Alexander P. Afanasenkov ◽

Tatyana P. Zheglova ◽

Alexander L. Petrov

Keyword(s):

Isotopic Composition ◽

Oil And Gas ◽

Carbon Isotopic Composition ◽

Source Rocks ◽

Type I ◽

Composition Distribution ◽

Carbon Isotopic ◽

Hydrocarbon Biomarkers ◽

Humus Type ◽

Hydrocarbon Deposits

Based on analyzes of carbon isotopic composition, distribution and composition of hydrocarbon biomarkers of oils and bitumoids from source rocks of the Mesozoic sediments in the western part of the Yenisei-Khatanga oil and gas region and the northeast of the West-Siberian plate, two groups of oils and bitumoids are identified, genetically associated with organic matter, mainly sapropel type (I group) and mainly humus type (II group). The genetic correlation of oils and bitumoids has been made. Possible foci of generation, which participated in the formation of hydrocarbon deposits, have been determined.

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HYDROCARBON GENERATION IN THE AMADEUS BASIN, CENTRAL AUSTRALIA

The APPEA Journal ◽

10.1071/aj83003 ◽

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.

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