scholarly journals Assessment of the facial affiliation of local oil and gas objects based on geophysical data

2021 ◽  
Vol 21 (4) ◽  
pp. 241-247
Author(s):  
Boris A. Golovin ◽  
◽  
Konstantin B. Golovin ◽  
Marina V. Kalinnikova ◽  
Sergey A. Rudnev ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Facies Analysis ◽  
Geophysical Methods ◽  
Well Logging ◽  
Geophysical Data ◽  
Gas Content ◽  
Seismic Exploration ◽  
Core Material ◽  
Genetic Characteristics ◽  
Reservoir Potential

In the established practice of geological exploration for oil and gas conclusions about the facies belonging of the rocks of oil and gas basins and individual exploration areas were made mainly on the basis of the study of core material. Recently for this purpose the results of seismic exploration and well logging have been used. Geophysical methods despite their obvious progress are indirect and intermittent core sampling and incomplete coring make facies analysis difficult. Тhe study of cuttings during the well logging process makes it possible to fill this gap through direct continuous observations along the well section. The use of the whole complex of geophysical methods allows one to mutually compensate for the limitations and disadvantages of each of them and more fully and reliably assess the genetic characteristics and reservoir potential of productive deposits. Sequential accumulation, comparison and analysis of heterogeneous geophysical data make it possible to continuously refine apriori facies models and forecast oil and gas content which ultimately allows to optimize the directions and volumes of drilling.

scholarly journals Role of multiple reflections in the formationof wave field in the cretaceous successions of the Middli Kura depression in Azerbaijan

2021 ◽  
Vol 43 (3) ◽  
pp. 123-134
Author(s):  
T. R. Akhmedov ◽  
T. Kh. Niyazov
Keyword(s):  
Wave Field ◽  
Upper Cretaceous ◽  
Oil And Gas ◽  
Geophysical Methods ◽  
Geological Structure ◽  
Gas Content ◽  
Seismic Exploration ◽  
Time Interval ◽  
Multiple Reflections ◽  
Seismic Sections

The article is devoted to the elucidation of the nature of the wave field recorded below the supporting-dominant seismic horizon «P» in the Middle Kura depression of Azerbaijan. A brief overview of the work carried out here is given; it is indicated that some geologists and geophysicists of our country, in our opinion, mistakenly assume that the observed wave field below the specified horizon is formed mainly by multiple reflections. Since the introduction of the common depth point method into the practice of seismic exploration, individual areas of the Middle Kura depression in Azerbaijan, including the Yevlakh-Agjabedi trough, have been repeatedly studied with varying degrees of frequency tracking. On the basis of this, a fairly large number of promising structures have been identified and mapped. But the structure of the Mesozoic, in particular the deposits of the Upper Cretaceous, still remains insufficiently studied. The study of the geological structure of the Mesozoic sediments, which are considered promising in terms of oil and gas content, is an urgent geological task; exploration work was carried out in the studied areas of the Middle Kura depression using a complex of geophysical methods at the modern technical and methodological level and new results were obtained. The constructed seismic sections show a dynamically pronounced and well-traceable seismic horizon corresponding to the Mesozoic surface and located deeper than it, relatively weak, short, discontinuous reflective boundaries that characterize the structure within the Mesozoic deposits. The studies carried out on the basis of modeling and velocity analysis made it possible to prove that the wave field in the time interval corresponding to the Mesozoic deposits owes its origin to intermittent single reflections from volcanic-carbonate deposits of the Upper Cretaceous age.

scholarly journals PROMISING SITES FOR OIL AND GAS NADYM DEPRESSIONS

2016 ◽  
pp. 33-37
Author(s):  
R. I. Safin
Keyword(s):  
Oil And Gas ◽  
Well Logging ◽  
Geological Structure ◽  
Gas Content ◽  
Seismic Exploration ◽  
Paleozoic Basement ◽  
Well Tests ◽  
Gas Bearing

The paper describes the geological structure and oil and gas content in Nadym depression, which is almost entirely located over the oil-and-gas geological zoning in the oil and gas bearing area Yarudey of Frolovskaya petroleum bearing region. The generalization of the results of drilling, regional seismic exploration, core studies, well logging and well tests lead to identification of potential productive formations in the Jurassic-Cretaceous platform complex and in the Paleozoic basement. Some recommendations for further direction of exploration are proposed.

scholarly journals ПЕРСПЕКТИВЫ НЕФТЕГАЗОНОСНОСТИ СЕВЕРО- АБШЕРОНСКОГО АРХИПЕЛАГА ЮЖНО- КАСПИЙСКОЙ ВПАДИНЫ В СВЯЗИ С ТЕКТОНИЧЕСКИМ РАЗВИТИЕМ СТРУКТУР

2019 ◽  
pp. 16-22
Author(s):  
Насибова Г. Д. ◽  
Мухтарова Х. З.
Keyword(s):  
Oil And Gas ◽  
Deep Structure ◽  
Geophysical Methods ◽  
Seismic Exploration ◽  
The South ◽  
Gas Field ◽  
Foreign Companies ◽  
Oil And Gas Resources ◽  
Hydrocarbon Fields ◽  
Exploration Drilling

Over the past decades, discovery of giant hydrocarbon fields at the depth of above 10 km in the World oceans enables the possibility of identifying oil and gas at great depths of the South Caspian depression (SCD).The main oil and gas resources in this region are associated with the Productive Series (PS) -Red Series (RS) of the Lower Pliocene. Paleogene-Miocene and Mesozoic sediments in the southern Caspian are submerged to great depths, the prospects of their oil and gas potential are associated with the most uplifted tectonic zones.The Northern Absheron, that is considered as one of the promising areas of this region, covers the uplifts zone under the same name that is the most elevated tectonic unit of the South Caspian. The zone under consideration consists of two anticlinal lines, within which about 20 structures have been identified and explored. Currently, about 10 structures are covered by prospecting and exploration drilling and 5 prospective oil and gas structures have been identified: Absheron kupesi, Western Absheron, Novkhany, Ashrafi, Garabakh.Testing of exploration wells on the structures Gilavar, Hali, Arzu, Ashrafi, Mardakan-deniz and Oguz has not been positive. It should be noted that the deep structure of these uplifts is poorly studied by seismic exploration. Detailed integrated geophysical survey at modern technological and methodological levels is necessary to examine the relation of structural plans of sediments of various ages. The prospects oil and gas field exploration are associated with the lower part of the PS, Miocene, Cretaceous and Jurassic.It should be noted that despite negative conclusions of some foreign researchers on non-productiveness of the structures above, in recent years, the data obtained from the results of new geological and geophysical methods give SOCAR the basis to resume exploration drilling without involvement of foreign companies.

scholarly journals ГЕОЛОГИЧЕСКИЕ ПРЕДПОСЫЛКИ ПОИСКОВ ЗАЛЕЖЕЙ НЕФТИ И ГАЗА В СТРАТИГРАФИЧЕСКИХ И ЛИТОЛОГИЧЕСКИХ ЛОВУШКАХ ЮГО-ЗАПАДНОГО БОРТА НИЖНЕКУРИНСКОЙ ВПАДИНЫ

2021 ◽  
Author(s):  
Мухтарова Хураман Зиядхан гызы ◽  
Насибова Гюльтар Джумшуд гызы ◽  
Микаилова Гюляр Фамиль гызы
Keyword(s):  
Oil And Gas ◽  
Geophysical Methods ◽  
Gas Content ◽  
Surface Studies ◽  
Unconformity Surface

The Lower Kura depression is a recognized oil and gas generating basin, characterized by positive stratigraphic, lithological-facies and structural-tectonic criteria for oil and gas content. However, it is necessary to additionally assess the prospects for oil and gas content of the southwestern side of the basin, guided by the criteria for the presence of reservoirs, seals and traps, paleotectonic criteria and seismic geological indicators.According to the results obtained from a detailed study by geophysical methods of the Kyurovdag-Neftchala belt and the territories framed to it, it was found that developed lithologically limited and stratigraphic traps in the Sarkhanbeyli, Orta Mugan, Shargi Shorsulu and Babazanan areas have all the signs of oil and gas prospects. These traps are located at a depth of no more than 4.5 km between the Mesozoic paleorelief protrusions and the Pleocene sediments covering them. It was the disagreement between these rocks that played an important role in the migration and accumulation of hydrocarbons. It should be noted that the traps formed in the process of sedimentation by primary reservoirs above the unconformity surfaces are sedimentation-stratigraphic and adjacent to the unconformity surface. Studies have revealed similar traps in deeper pinching horizons, which can be considered promising in terms of the development of reservoirs, cap rocks and oil-damaging reservoirs.

Characterizing the Seismic Response of Naturally Fractured Basement Reservoir in Sumatra Area: Towards an Efficient Seismic Exploration Strategy

2021 ◽  
Author(s):  
P. D. Wardaya
Keyword(s):  
Oil And Gas ◽  
Graphics Processing Unit ◽  
Geophysical Methods ◽  
Computing System ◽  
Gas Production ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Fracture Plane ◽  
Processing Unit ◽  
Fracture Properties

Although only contributes few to the total oil and gas production, fractured basement reservoir is one of the important unconventional reservoirs in Indonesia. It was estimated that the gas reserve in basement in South Sumatra is about 6 TCF (trillion cubic feet). Most of the existing geophysical methods is not intended to explore events within the basement. In fact, majority of basement reservoir discovery was coincident. Despite its significant contribution to Indonesia’s gas production, the exploration success story in the fractured basement play is still poorly documented. The challenges and difficulties in their characterization are higher than the conventional reservoir. This study presents an integrated geological and geophysical approach to improve the outcome of seismic imaging of the fractured basement reservoir. A comprehensive geological study and geophysical modelling were conducted to provide an efficient strategy for designing an optimum seismic survey in imaging the fractures within the basement. Both surface and subsurface data were thoroughly analyzed to yield a reliable representation of the subsurface fracture model at basement level. Outcrop sample analysis combined with aerial remote sensing analysis were performed as input to digital outcrop modelling. The modelling was intended to provide information about fracture orientation, length, and density. This will provide a fracture property in the surface which is related to the fracture properties in subsurface. The resulting fracture properties was then used as an input to evaluate the seismic wave response during its propagation in the reservoir. Seismic modelling has been done using a 2D finite-difference full wavefield approach in a Graphics Processing Unit (GPU) accelerated computing system. We observe how fracture properties affect the propagating seismic wavefield. Wave scattering is observed more prominently around the fracture tip when the fracture plane is orthogonal to wavefield direction.

scholarly journals Using magnetotellurgic sounding for estimation of oil and gas content of mesozoic era in of Western Kazakhstan

2016 ◽  
pp. 52-58
Author(s):  
G. K. Umirova ◽  
S. A. Istekova ◽  
I. N. Modin
Keyword(s):  
Oil And Gas ◽  
Well Logging ◽  
Geological Structure ◽  
Gas Content ◽  
Geoelectric Model ◽  
Sedimentary Deposits ◽  
Western Kazakhstan

The article shows results of test electrical surveys conducted on one of deposits of Western Kazakhstan. Digital geoelectric model and test sections of the area were constructed by the results of processing and interpretation of electrometric data. Effective using of MT sounding with complex of seismic and well- logging data for classification of a geological structure and allocation of prospective oil and gas areas ofterrigeneusly-sedimentary deposits of Mesozoic period is also shown in the article.

scholarly journals New methods for isolation and mapping of natural reservoirs for underground hydrogen storage in depleted hydrocarbon deposits

2020 ◽  
pp. 3-12
Author(s):  
I.V. Kolokolova ◽  
I.N. Konovalova
Keyword(s):  
Oil And Gas ◽  
Layer Structure ◽  
Geophysical Methods ◽  
Seismic Exploration ◽  
Gas Reservoirs ◽  
Water Contact ◽  
New Methods ◽  
Natural Oil ◽  
Hydrocarbon Deposits ◽  
Underground Hydrogen Storage

The article proposes new methodological techniques for identifying and mapping true and false seals based on the data of geophysical methods, according to the main provisions of the theory of the three-layer structure of natural oil and gas reservoirs. Seismic exploration in combination with well logging makes it possible to control the storage volumes, determine the gas-water contact contour and obtain detailed models of the natural reservoir.

scholarly journals Development of Zone Forecast probability Models for Oil and Gas Potential in the Central Part of the Permian Uplift by Structural and Capacity Criteria

2021 ◽  
Vol 21 (1) ◽  
pp. 2-8
Author(s):  
Konstantin A. Koshkin ◽  
◽  
Ilya A. Tatarinov ◽  
Keyword(s):  
Probabilistic Models ◽  
Oil And Gas ◽  
Gas Content ◽  
Seismic Exploration ◽  
Probability Models ◽  
Deep Drilling ◽  
Structural Problems ◽  
Use Of Data ◽  
Deep Wells ◽  
Gas Potential

The task to which this article is devoted has not received due attention in recent years, since the preparation of structures for deep drilling is carried out using seismic exploration. At the same time, there is a huge array of data on structured drilling, unfortunately, it has not been fully used. Thus, the goal of the study is to use data on structured drilling to solve not only structural problems for marking surfaces, but also more complex ones related to zonal oil and gas potential of territories. The forecast of oil and gas content for marking and oil and gas horizons was carried out in three zones of oil and gas geological zoning. Using the data on these territories, studies were carried out to build probabilistic models for the zonal forecast of oil and gas content. To substantiate the joint use of data on marking surfaces and data on the tops of oil-bearing horizons, materials were studied for 447 deep wells. Probabilistic models of zonal forecast of oil and gas content of the central part of the Permian uplift were developed according to structural and capacity criteria. The complex use of data on the absolute marks of deep and structured wells made it possible to rank the territory of the central part of the Permian uplift by the degree of zonal oil and gas content. Severokamskoye (0.73), Krasnokamskoye (0.67), Baklanovskoye (0.67), Polaznenskoye (0.67), Rassvetnoye (0.64) and Mezhevskoye (0.63) fields were characterized by the maximum values of P COM. For the Kozubaevskoye field, the P COM was 0.57. The Gorskoye, Lobanovskoye, Talitskoye, Zorinskoye and Shemetinskoye fields were characterized by minimum values of P COM, varying in the range of 0.51–0.53. This scheme can be used when designing prospecting and exploration works in this area.

scholarly journals Differentiation of Rudov Beds based on the statistical methods on geological and geophysical data

2021 ◽  
pp. 5-10
Author(s):  
O. M. Karpenko ◽  
V. V. Ohar ◽  
I. O. Karpenko ◽  
I. M. Bezrodna
Keyword(s):  
Organic Carbon ◽  
Statistical Methods ◽  
Oil And Gas ◽  
Regional Distribution ◽  
Close Correlation ◽  
Well Logging ◽  
Geological Structure ◽  
Geophysical Data ◽  
Donets Basin ◽  
Gas Generation

Purpose. To perform the lithological-facies dismemberment of the Rudov Beds using geological and well-logging data to clarify the formation genesis of the hydrocarbon sources deposits within the Yablunivska structure of the Dnieper-Donets basin. Methodology. Cluster and factor analysis methods were used as well as Q.Passys method of well logging data interpretation for estimating the content of organic carbon (TOC). Findings. Regularities of geological structure, lithological heterogeneities, distribution of separate lithotypes and content of organic carbon in the Rudov Beds within Yablunivske oil and gas condensate field are established. The spatial distribution of separate facies types of rocks, thicknesses of their radioactivity layers and content of organic carbon (organic matter) within a single structure of the Dnieper-Donets depression is studied. Originality. For the first time according to geophysical data with the use of statistical methods, the lithological-facies dismemberment of the petroleum bearing strata, which have a regional distribution within the Dnieper-Donetsk basin, has been performed. It is found that there is no close correlation between natural radioactivity and the content of organic carbon in the Rudov Beds of the Lower Carboniferous. Certain conclusions have been made concerning the confirmation of the hypothesis about the formation of the Rudov beds in the conditions of shallow water desalinated sea gulf. Practical value. The proposed approach to lithological-facies dismemberment of the Rudov Beds by the well-logging data allows clarifying conditions for petroleum bearing stratum formation in order to assess its real oil and gas generation potential.

scholarly journals Substantiation of paleohydrodynamic sedimentation modes and identification of missed oil-and-gas saturated areas that are promising for additional exploration of the Lower Cretaceous deposits of the Albian stage of the Achikulak oil field according to geophysical well logging data

2021 ◽  
Vol 931 (1) ◽  
pp. 012018
Author(s):  
T V Ibragimova ◽  
Ye Yu Tumanova ◽  
Z V Sterlenko ◽  
N V Yeriomina ◽  
A A Rozhnova ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Scientific Research ◽  
Well Logging ◽  
Oil Field ◽  
Gas Content ◽  
Main Attention ◽  
Low Amplitude ◽  
Hydrocarbon Deposits ◽  
Cretaceous Deposits

Abstract In the development of the oil and gas complex, the improvement of methods for studying the patterns of distribution of hydrocarbon deposits is of particular importance. At the same time, scientific research can be carried out in different directions. These include increasing the resolution of various methods of borehole and areal geological and geophysical studies of lithological features and oil-and-gas content, developing new approaches to interpreting well logging results, analyzing the productivity of poorly studied regions and areas of the section, identifying low-amplitude folds and non-anticlinal deposits. The development of hydrocarbon deposits in the Stavropol Territory has been going on for many decades, which has led to reduction of deposits within medium and large anticlinal uplifts. Therefore, the main attention is now paid to the prospect for low-amplitude and small-size uplifts and traps of the non-anticlinal type, which include lithological and stratigraphic ones.

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