Oil-gas potential of marine and oceanic floors in light of theory of oil and gas sedimentary basins

1975 ◽  
Vol 17 (7) ◽  
pp. 762-766
Author(s):  
B.A. Sokolov
1980 ◽  
Vol 100 ◽  
pp. 94-98
Author(s):  
B Larsen

Project DANA 79 is a part of GGU's geophysical investigations of the East Greenland shelf with special reference to the oil and gas potential of the continental margin. The programme also includes a regional aeromagnetic survey called EASTMAR (Larsen & Thorning, this report) and the planned deep seismic investigations (Risum, this report). Project DANA 79 was designed to provide knowledge of the geology of the sea floor and the shallow (0-300 m) subsurface. Special emphasis was put on the delineation of the basement and of the sedimentary basins on the shelf. The project was mainly sponsored as an energy related research programme by the Danish Ministry of Trade, Industry and Shipping, and was also supported by the Danish Natural Science Research Council.


Author(s):  
В.Б. Свалова

Актуальность работы определяется важностью оценки и прогноза нефтегазового потенциала глубоких осадочных бассейнов, в частности, глубоких горизонтов структур, не всегда доступных глубокому бурению в поисковых и разведочных целях. Цель и методы исследования. Наряду с прикладными вопроса- ми целью исследования являются фундаментальные вопросы теоретической геодинамики формирования и эволюции осадочных бассейнов в связи с подъемом мантийных диапиров на основе методов механи- ко-математического моделирования. Прикаспийская впадина и восточный сегмент Кавказского региона, включая Каспийское море, могут рассматриваться как регионы окрестности восточной части Альпийского пояса, который в свою очередь является западной частью Альпийско-Гималайского пояса, простирающе- гося от западной оконечности Средиземного моря до Тихоокеанского побережья. Каспийское море пере- секает с севера на юг серию широтных структурных зон юго-восточной окраины древней докембрийской Восточно-Европейской платформы, молодой эпигерцинской Скифско-Туранской платформы и современ- ного Альпийско-Гималайского орогенного пояса. Прикаспийская и Южно-Каспийская впадины являются глубокими осадочными бассейнами с толщиной осадочного чехла более 20 км, обладающими высоким нефтегазовым потенциалом и большим народно-хозяйственным значением. Формирование и эволюция осадочного бассейна служат ключом для определения зон нефтегенерации осадочного чехла, что делает задачу изучения геодинамики осадочных бассейнов крайне важной и необходимой. Геодинамика релье- фа поверхности определяется глубинными мантийными движениями. Механико-математическая модель динамики литосферы дает возможность количественно связать параметры формирующегося осадочного бассейна с подъемом мантийного диапира. Анализ геофизических полей геологических структур позволя- ет оценить подъем астеносферы, а разработанная самосопряженная термогравиметрическая модель ли- тосферы делает эти оценки надежными и достоверными. Геодинамика и история развития геологических структур определяют магматизм, вулканизм, сейсмичность, геотермические характеристики, геотермаль- ную активность, нефтегазоносность, опасные природные процессы региона, что в свою очередь является обоснованием создания системы комплексного экологического мониторинга на фундаментальной научной базе, прогноза и предупреждения природных бедствий и катастроф, а также поиска полезных ископаемых, включая углеводороды. Результатом работы является количественная оценка подъема астеносферы под осадочным бассейном на примере Прикаспийской впадины The relevance of the work is determined by the importance of assessing and predicting the oil and gas potential of deep sedimentary basins, in particular, deep horizons of structures that are not always accessible to deep drilling for prospecting and exploration purposes. The aim and research methods. Along with applied questions, the aim of the study is the fundamental questions of the theoretical geodynamics of the formation and evolution of sedimentary basins in connection with the rise of mantle diapirs based on the methods of mechanical and mathematical modeling. Pre-Caspian Depression and eastern segment of Caucasus region, including Caspian Sea, can be considered as regions of area of eastern part of Alpine belt, which is western part of Alpine-Himalayan belt disposed from Mediterranean sea to Pacific Ocean. Caspian sea crosses from North to South the series of structural zones of East European platform, Scythian-Turan platform and Alpine-Himalayan belt. Pre-Caspian Depression and South Caspian Depression are deep sedimentary basins with thickness of sedimentary cover more than 20 km which have high oil-gas potential and big industrial importance. Formation and evolution of sedimentary basin is the clue for oil-gas generation zones of sedimentary cover, that makes the problem of sedimentary basins geodynamics of great importance one. Geodynamics of relief is defined by deep mantle movements. Mechanical-mathematical model of the lithosphere dynamics gives possibility to link the basin parameters with mantle diaper upwelling. Analysis of geophysical fields gives opportunity to evaluate the asthenosphere upwelling, and elaborated self-conjugated thermo-gravimetric model makes this evaluation reliable and trustworthy one. Geodynamics and evolution history of geological structures determine magmatism, volcanism, seismicity, geothermics, geothermal manifestations, oil-gas potential, natural hazards of region, that is basement for monitoring system creation and construction on fundamental scientific base, forecast and prognosis of natural catastrophes and oil-gas potential researches. The result of this work is a quantitative assessment of the rise of the asthenosphere under the sedimentary basin using the example of the Pre-Caspian Depression


2021 ◽  
Vol 132 (1) ◽  
pp. 25-29
Author(s):  
N. T. Thinh ◽  

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.


Author(s):  
A. Khuduzade ◽  
Sh. Akhundov ◽  
S. Shabanova ◽  
T. Imamalili ◽  
O. Ismaylov

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.


Neft i gaz ◽  
2020 ◽  
Vol 6 (120) ◽  
pp. 20-34
Author(s):  
О.S. TURKOV ◽  

The Caspian Basin is a unique geological object, the most notable features of which are the anomalously large thickness of the sedimentary cover and its enormous hydrocarbon potential. It is generally known that the main reserves in the identified fields and the prospects for discovering new large deposits of oil, gas and gas condensate here are associated with a subsalt complex of terrigenous and carbonate strata, submerged in the central part of the basin to depths of over 10 km. To date, this complex has been most studied in the edges of the depression at depths of 4-5 km. Confident forecasting of oil prospecting operations for deeper-lying objects is constrained by low researched of their structural, lithological, thermobaric and other parameters. In the debate about these very complex problems, one rarely recalls such a simple and at the same time crucial fact as direct signs of oil and gas potential. Indeed, every year we receive more and more new data on the “breathing of resources”, on the hydrocarbons migration from subsalt sediments into post-salt reservoirs, but we do not give them due attention. The article provides convincing, in the author's opinion, examples of the formation of post-salt deposits on salt domes due to the vertical migration of hydrocarbons. Taking this process into account, recommendations were made both НЕФТЬ И ГАЗ 2020 6 (120) 21 ГЕОЛОГИЯ on the general method of oil prospecting in subsalt deposits, and specific proposals for the search for subsalt and post-salt deposits of oil and gas.


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