ON THE PROBLEM OF THE WATER DOWNWARD FILTRATION IN THE OIL-AND-GAS BEARING SEDIMENTARY BASINS

At the limit of the East-Canadian continental margin there are three oil and gas regions from north to south: Labrador Sea shelves, margins of the Great Newfoundland Bank and the continental margin of Nova Scotia. In each of these distinguishing regions are a number of sedimentary basins completely plunging under the water. At the shelf of Labrador Sea distinguishing the following large sedimentary basins: Saglek, Hopdale and Havke, at the margin of Newfoundland Bank it is known the basins: Jeanne d’Arc, Flemish Pass and Orphan. At the Nova Scotia shelf there are Nova Scotian and Sable basins. It is remarkable at the lofty latitude like of Labrador Sea region the age of the productive sediments beginning from more ancient rocks (Paleozoic), than in basins situated in law latitude (Mesozoic). In consequence of this the stratigraphy diapason of oil and gas bearing of the north latitude is considerably wide. The prospect of oil and gas bearing in all region is related principally with continental slopes and turbidites sediments in its. Late Jurassic and early Cretaceous reservoirs would be the aim for deep drilling sediments. Wide distribution of late Cretaceous and early Tertiary prospects reservoirs of oil and gas is quite really so far as they are bedded in the shallow horizons. Also the prospect of oil and gas bearing at the margin of the basin is related to late Cretaceous and Tertiary sediments, to deposits of fan and diapirs salt.

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Dynamics of lithogenesis of Phanerozoic sedimentary sequence of the Carpathian-Black Sea region in the aspect of their oil- and gas-bearing potential

Geology and Geochemistry of Combustible Minerals ◽

10.15407/ggcm2021.01-02.060 ◽

2021 ◽

Vol 1-2 (183-184) ◽

pp. 60-75

Author(s):

Nataliya Radkovets ◽

Kostyantyn Hrygorchuk ◽

Yuriy Koltun ◽

Volodymyr Hnidets ◽

Ihor Popp ◽

...

Keyword(s):

Black Sea ◽

Oil And Gas ◽

Morphological Changes ◽

Sedimentary Basins ◽

Hydrocarbon Generation ◽

Burial History ◽

Reservoir Properties ◽

Study Region ◽

Black Sea Region ◽

Gas Bearing

The objective of this work was to study the environments and processes of ancient sedimentation in the epi- and mesopelagic basins of the Carpathian-Black Sea region and to clarify the conditions of oil and gas basins formation within the study region as well as the main aspects of hydrocarbon generation. The burial history of the basins, some aspects of their fluid regime, issues of lithogenetic record, features of transformation of sedimentary basins into the rock-formation basins and the development of the latter during the Phanerozoic are considered. The spatial and temporal peculiarities of the evolution of epi-mesopelogic systems and their influence on the formation of oil- and gas-bearing strata within the Carpathian-Black Sea region have been studied. It has been established that in the sedimentary basins of the Carpathian-Black Sea continental margin of the Tethys Ocean during the long geological history the different intensity structural and morphological changes took place: changes of the subsidence rate of the basin bottom, inversion uplifts, sedimentation pauses, deformation of the sedimentary fill. This was reflected both in the peculiarities of the development of sedimentary environments and in the processes of substance differentiation with the formation of certain post-sedimentary mineral-structural parageneses. It was proved that discrete processes of differentiated compaction and defluidization of sediments cause a number of deformation phenomena, which can be reflected in the features of the morphology of the sedimentary basin bottom, influencing the nature of sediment transportation and accumulation. On the basis of the conducted investigations a number of practical results were obtained which will allow forming new approaches to criteria of hydrocarbons prospecting, in particular the lithophysical aspect which is concentrated on the reservoir properties of rocks; sedimentary reconstructions and the diversity of cyclicity of the studied sediments as a factor of the establishment of prospective areas, reconstruction of the burial history, which provides an information on the state of transformation of organic matter and hydrocarbons, and therefore the range of prospective depths for oil and gas occurrence.

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Petroleum Potential in the Center of Song Hong Basin of the Northern Continental Shelf Vietnam

Oil and Gas technologies ◽

10.32935/1815-2600-2021-132-1-25-29 ◽

2021 ◽

Vol 132 (1) ◽

pp. 25-29

Author(s):

N. T. Thinh ◽

Keyword(s):

Continental Shelf ◽

Oil And Gas ◽

Sedimentary Basin ◽

Sedimentary Basins ◽

Geological Structure ◽

Central Basin ◽

Petroleum Potential ◽

History Of ◽

Gas Potential ◽

Gas Bearing

The sedimentary basin Song Hong is one of the largest Cenozoic oil and gas bearing sedimentary basins, in which the center of the basin covers a large part. It elongates from block 105 to block 115. This article presents the geological structure, history of geological development, oil and gas potential and characteristics of reservoirs f the central basin, where the thickness of the basin deposits reaches more than 16 000 m.

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Modeling of the tectonic position and prediction of the spatial distribution of hydrocarbon deposits in the Middle Kura depression (examples from the Ganja oil and gas-bearing region)

Мінеральні ресурси України ◽

10.31996/mru.2019.4.38-44 ◽

2020 ◽

pp. 38-44

Author(s):

A. Khuduzade ◽

Sh. Akhundov ◽

S. Shabanova ◽

T. Imamalili ◽

O. Ismaylov

Keyword(s):

Oil And Gas ◽

Sedimentary Cover ◽

Sedimentary Basins ◽

Petroleum Potential ◽

Tectonic Position ◽

Geochemical Factors ◽

History Of ◽

Fundamental Research ◽

Gas Potential ◽

Gas Bearing

The article continues the series of publications devoted to the forecast of oil and gas potential in the Middle Kura Depression. Systematization and analysis of published materials show that the effectiveness of prospecting and exploration for oil and gas depends on the fairness and accuracy of scientific ideas about the origin and patterns of hydrocarbon localization. The established heterogeneity of the structure of sedimentary basins and the uneven distribution of oil and gas deposits in them allows us to make a predictive assessment of territories based on historical-geological methods and a synthes analysis of criteria for assessing the prospects of oil and gas. These methods are based on fundamental research in geology, the most important of which are structural-tectonic analysis and the genesis of oil and gas-bearing structures, the study of geological and geochemical factors in the simulation model “Uniform continuous lowering”, the study of the staged conversion of organic matter in the catagenetic process and show the oil and gas windows, prediction of collector and overlying seal zones, study of organic substances dissolved in water and other hydrogeological factors contributing to the formation and prevent of oil and gas deposits. Analysis of the geological history of the first stage of research,the assessment of petroleum potential of the region. Based on the results of seismic surveys, we carried out paleotectonic reconstructions for the northwestern zone of the Ganja oil and gas-bearing region, which illustrate the maps of total thickness in the form of isopachic triangle, paleotectonic profiles and graphic of subsidence size. Modeling of structural surfaces made it possible to establish the historical development of not only local structures, but also to notice new features in the formation of chronostratigraphic surfaces, and to judge the tectonic regime of the sedimentation basin, to justify the mechanism of formation in the sedimentary cover of the Middle Kura depression, both of plicative dislocation and faulting as well as zones of oil and gas accumulation associated with them. The study can be considered as a positive argument when choosing the location of the prospecting well.

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Vertical thermobaric zoning of hydrocarbon deposits of the Eastern oil- and gas-bearing region of Ukraine

Geology and Geochemistry of Combustible Minerals ◽

10.15407/ggcm2019.03.060 ◽

2019 ◽

Vol 3 (180) ◽

pp. 60-75

Author(s):

Oleksandr Prykhodko ◽

Ihor Hrytsyk ◽

Ihor Kurovets ◽

Svitlana Melnychuk

Keyword(s):

Oil And Gas ◽

Vertical Section ◽

Sedimentary Basins ◽

Geological Structure ◽

The North ◽

Northern Edge ◽

Different Depths ◽

Hydrocarbon Deposits ◽

Gas Bearing

For the predictive appraisal of the perspective exploratory territories as well as prediction of separate producing horizons of prospecting and exploration areas for oil and gas it is necessary to establish the regularities of distribution of already explored deposits of hydrocarbons with structural-tectonic construction, lithological-stratigraphic features, hydrogeological and geothermobaric conditions of oil- and gas-bearing region taken into account. Interconnection between geothermobaric parameters and the phase state of hydrocarbons in the vertical section should be an important factor for the solution of the posed task. Within the limits of the Eastern oil- and gas-bearing area of Ukraine, the spatial zoning is established in the location of gas, oil and gas-condensate deposits. As a whole, the distribution of temperatures and pressures at different depths, average geothermal gradients, gradients of the lithological-stratigraphical horizons of the same name (sustained both as to the area and thickness) are closely connected with the deep geological structure of the studied region (area) and confirm the existing notions of the role of tectonic, lithological-stratigraphic and hydrogeological factors in the formation of the thermal regime of sedimentary basins. Vertical zoning of the distribution of hydrocarbon deposits of oil- and gas-bearing horizons was developed according to geothermobaric parameters of the north-western part of the Dnieper-Donets Depression and 8 areas from 15 ones of the Eastern oil- and gas-bearing region, namely: Monastyryshche-Sofiivka and Talalaivka-Rybalske oil- and gas-bearing areas, Glynsk-Solokha gas- and oil-bearing area, Ryabukhyne-Northern Golubivka and Mashivka-Shebelynka gas-bearing areas, Rudenky-Proletarske oil- and gas-bearing region, Krasna Rika gas-bearing area and also oil- and gas-bearing area of the Northern edge. Revealed regularities of the distribution of formation temperatures, pressures, geothermal and thermobaric coefficients with peculiarities of the tectonic structure of the Dnieper-Donets graben taken into account will make it possible to solve theoretical problems connected with hydrocarbon migration, the formation and preservation of deposits in more well-founded way that will make it possible to conduct prospecting for new fields at great depths within the studied territory more effectively.

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