scholarly journals Paleobasins – a new concept of modeling the history of geological development and oil and gas bearing of regions

Georesursy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 4-12
Author(s):  
Antonina V. Stoupakova ◽  
Alexander A. Pashali ◽  
Victoria V. Volyanskaya ◽  
Anna A. Suslova ◽  
Anna P. Zavyalova
Keyword(s):  
Oil And Gas ◽  
Local Level ◽  
Regional Scale ◽  
Historical Analysis ◽  
Petroleum Potential ◽  
Subsequent Transformation ◽  
Geological Processes ◽  
History Of ◽  
Gas Potential ◽  
Gas Bearing

“Paleobasin” is an area of long-term and steady subsidence of the Earth’s crust at a certain stage of geological development in the past, during which a body of sedimentary rocks of a mega-regional scale is formed, subsequently subjected to the influence of various kinds of geological processes leading to a reduction in its size, as well as changes in geometry and structure. Paleobasin is not a new concept. However, for petroleum, historical analysis was used only for those sedimentary strata that were not metamorphosed or collapsed into folds. As a result, the side zones of the basins and deep horizons were excluded from the basin modeling. The proposed approach to the analysis of paleobasins, regardless of the degree of their subsequent transformation, makes it possible to assess the petroleum potential of past eras, both primary and residual, especially in those zones and horizons that were previously derived from a general consideration of the prospects for finding oil and gas. The article shows the need for an integrated historical approach to the analysis of the oil and gas potential of the territory, both at the basin level and at the local level, including sedimentary strata and strata, which are often referred to as the “acoustic foundation”. Unfortunately, very often when modeling a promising object and assessing its resources or reserves, some of these attributes are taken for the type of work already done and do not adapt to a single model of oil and gas deposits, which reduces the reliability of the final result.

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

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.

scholarly journals 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)

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.

scholarly journals OIL AND GAS COMPLEXES OF THE ALDANO-MAY OIL AND GAS REGION

2021 ◽  
Vol 2 (1) ◽  
pp. 282-290
Author(s):  
Andrei M. Fomin ◽  
Igor A. Gubin ◽  
Sergey A. Moiseev
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Fields ◽  
History Of ◽  
Gas Fields ◽  
Gas Potential ◽  
Gas Bearing

The article discusses the history of the geological study of the Aldan-Maya oil and gas region, during which numerous signs of oil and gas potential were identified. The description of oil and gas bearing complexes of sedimentary strata is given. It is shown that the prospects for the discovery of new oil and gas fields in the Aldan-Maya oil and gas bearing area were assessed quite high.

scholarly journals Indicator signs of carbonate microbialites in black shale formations: isotopic composition and biomarkers

2021 ◽  
Vol 11 ◽  
pp. 55-61
Author(s):  
M. A. Tugarova ◽  
Keyword(s):  
Isotopic Composition ◽  
Black Shale ◽  
Oil And Gas ◽  
Source Rocks ◽  
Unconventional Reservoirs ◽  
Shale Formations ◽  
Geological Processes ◽  
History Of ◽  
Oil Source ◽  
Gas Potential

Carbonate rocks represented by nodules, lenses, layers of different morphology and length are typical for the black shale formations of different ages. They are of the greatest interest in oil source rocks as indicators of complex and not always unambiguously interpreted geological processes. A special place among these sedimentary bodies is occupied by microbialites, which indicate suppression of development of marine organic biocenoses, and often reflect emanation processes in ancient strata. Proof of these phenomena is fundamentally important for predicting and assessing the oil and gas potential of unconventional reservoirs. On the example of carbonate solids of Triassic and Jurassic black shale formations, we present a complex analytical method to determine the microbial biochemical genesis of rocks on the base of the isotopic composition of carbon and oxygen, together with the hydrocarbon molecular markers of organic matter. The geochemical features of the isolated microbialites suggest that they are resulted from a complex history of black shale formations, which reflects both background lithogenetic transformations and superimposed processes, including high-temperature hydrothermal ones.

Oil and gas in Kurgan region

2021 ◽  
pp. 9-24
Author(s):  
A. A. Arsenyev ◽  
D. S. Leontiev ◽  
M. D. Zavatsky ◽  
V. V. Saltykov
Keyword(s):  
Oil And Gas ◽  
Field Work ◽  
Research Area ◽  
Petroleum Potential ◽  
Gas Recovery ◽  
History Of ◽  
And Migration ◽  
Active Processes ◽  
Geochemical Studies ◽  
High Degree

This article analyzes the prospects of petroleum potential in Kurgan region. The relevance of the work is due to the high degree of development of the traditional oil and gas recovery areas of Western Siberia, which leads to the need to organize search activities in areas with a low density of hydrocarbon resources. We have analyzed the results of exploratory drilling in the area of the Alabuga river in Kurgan region, and have studied the history of detections of onshore oil occurrences there. Based on the results of the retrospective analysis, the research area was determined, field work was performed to determine the state of search wells in the area, and a collection of geochemical soil and liquid samples was selected. The analysis of the samples revealed that all of them contain methane and its homologues up to and including pentane. The genesis of light methane homologs is related to the processes of catagenesis; their detection on the surface indicates active processes of generation and migration of petroleum hydrocarbons. Based on the analysis of archival materials and estimated ground-based geochemical studies, a conclusion is made about petroleum potential in Kurgan region.

PETROLEUM EXPLORATION IN THE PROTEROZOIC BEETALOO SUB-BASIN, NORTHERN TERRITORY

1994 ◽  
Vol 34 (1) ◽  
pp. 674 ◽  
Author(s):  
Kevin Lanigan ◽  
Shane Hibbird ◽  
Sandy Menpes ◽  
John Torkington
Keyword(s):  
Oil And Gas ◽  
Northern Territory ◽  
Petroleum Exploration ◽  
Hydrocarbon Potential ◽  
Petroleum Potential ◽  
Drill Stem ◽  
Gas Potential ◽  
Unknown Sequence

Exploration over Roper Group outcrop in the McArthur Basin prompted Pacific Oil & Gas to investigate the petroleum potential of the Beetaloo Sub-basin, a 15 000 km2 Proterozoic depression concealed beneath Phanerozoic cover. Since 1989 drilling and seismic has identified a broadly flat-lying sequence with uplifted, eroded margins. A 3 500 m composite Proterozoic section consisting of three sandstone-to-mudstone sequences has been drilled. The lower two sequences comprise conformable units of the Mesoproterozoic upper Roper Group and unconformably overlying them is a previously unknown sequence comprising the informally labelled 'Jamison Sandstone' and 'Hayfield Mudstone', probably of Neoproterozoic age.Organic-rich intervals in the Roper Group mudstones range one to three per cent TOC in the Kyalla Member, and two to seven per cent TOC in the 'Middle' Velkerri Formation. Across most of the sub-basin the oil window lies within the Kyalla Member around 900–1350 m, while the 'Middle' Velkerri Formation is around 2 500 m and well into overmaturity, but may still have potential for gas. Potential reservoirs in the Bessie Creek, Moroak and 'Jamison' Sandstones, and in sandy units within the mudstones, are compromised by diagenesis, but porosities of up to 20 per cent and permeabilities of tens and rarely hundreds of millidarcies have been measured. Encouraging shows were observed in many of these intervals, and small quantities of oil and gas have been recovered in drill stem tests. With only a few targets drilled to date, this frontier area requires more exploration before its hydrocarbon potential can be adequately assessed.

Recent geological advances in the understanding of the Torres Basin

2013 ◽  
Vol 53 (2) ◽  
pp. 459
Author(s):  
Michael Swift
Keyword(s):  
Cross Sections ◽  
Large Scale ◽  
Regional Scale ◽  
Coastal Region ◽  
Petroleum Potential ◽  
Structural Style ◽  
Time Space ◽  
Australian Plate ◽  
History Of ◽  
Geological Section

The Torres Basin is a recently discovered Mesozoic basin in the Papuan Plateau, southeast Papua New Guinea. Newly acquired deepwater offshore seismic data and older regional data have been (re)interpreted with the view of defining structural regimes in line with the onshore geological maps and conceptual cross sections. A regional time-space plot has been developed to elucidate the breakup of the northeastern Australian Plate with a focus on the geological history of the Papuan Plateau, which holds the Torres Basin geological section. This in turn has led to a re-evaluation of the structural style and history of the southern coastal region incorporating the East Australian Early Cretaceous Island Arc; it highlights that a significant horizontal structural grain needs to be considered when evaluating the petroleum potential of the region. The southern margin is characterised as a frontal thrust system, similar to the nearby Papuan Basin. A series of regional strike lines in conjunction with the dip lines is used to divide the region into prospective and non-prospective exploration play fairways. The role of transfer faults, basement-detachments faults, regional-scale thrust faults, and recent normal faulting is discussed in the compartmentalisation of the geological section. There is basement-involved anticlinal development on a large scale and a complementary smaller-scale thin-skinned anticlinal trend. These trends are characterised as having significant strike length and breadth. Anticlinal trap fairways have been defined and have similar size and distribution as that of the Papuan Basin.

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