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.

scholarly journals KEROGEN TYPES OF BAZHENOV FORMATION BASED ON PYROLYSIS DATA AND THEIR COMPARISON WITH OIL PARAMETERS

2017 ◽  
pp. 34-43
Author(s):  
E. E. Oksenoyd ◽  
V. A. Volkov ◽  
E. V. Oleynik ◽  
G. P. Myasnikova
Keyword(s):  
Organic Matter ◽  
Lower Cretaceous ◽  
Alternative Model ◽  
Oil And Gas ◽  
Upper Jurassic ◽  
Gas Content ◽  
Basin Modeling ◽  
Bazhenov Formation ◽  
Gas Bearing

Based on pyrolytic data (3 995 samples from 208 wells) organic matter types of Bazhenov Formation are identified in the central part of Western Siberian basin. Zones of kerogen types I, II, III and mixed I-II and II-III are mapped. Content of sulfur, paraffins, resins and asphaltenes, viscosity, density, temperature and gas content in oils from Upper Jurassic and Lower Cretaceous sediments (3 806 oil pools) are mapped. Oil gradations are identified and distributed. The alternative model of zones of kerogen II and IIS types is presented. The established distributions of organic matter types can be used in basin modeling and in assessment of oil-and-gas bearing prospects.

scholarly journals Improve The Efficiency Of The Study Of Complex Reservoirs And Hydrocarbon Deposits - East Baghdad Field

2020 ◽  
Author(s):  
Sudad H Al-Obaidi
Keyword(s):  
Oil And Gas ◽  
Water Saturation ◽  
Well Logging ◽  
Well Testing ◽  
Petrophysical Parameters ◽  
Oil And Gas Fields ◽  
Hydrocarbon Fields ◽  
Gas Fields ◽  
Hydrocarbon Deposits

Practical value of this work consists in increasing the efficiency of exploration for oil and gas fields in Eastern Baghdad by optimizing and reducing the complex of well logging, coring, sampling and well testing of the formation beds and computerizing the data of interpretation to ensure the required accuracy and reliability of the determination of petrophysical parameters that will clarify and increase proven reserves of hydrocarbon fields in Eastern Baghdad. In order to calculate the most accurate water saturation values for each interval of Zubair formation, a specific modified form of Archie equation corresponding to this formation was developed.

scholarly journals Conditions of formation and forecast of natural reservoirs in clinoform complex of the Lower Cretaceous of the Barents-Kara shelf

Georesursy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 63-79
Author(s):  
Alina V. Mordasova ◽  
Antonina V. Stoupakova ◽  
Anna A. Suslova ◽  
Daria K. Ershova ◽  
Svetlana A. Sidorenko
Keyword(s):  
Detailed Analysis ◽  
Lower Cretaceous ◽  
Oil And Gas ◽  
Barents Sea ◽  
Kara Sea ◽  
Distribution Area ◽  
Geological Model ◽  
The Barents Sea ◽  
Gas Potential ◽  
Cretaceous Deposits

Unique Leningradsky and Rusanovsky gascondensate fields in the Barrem-Cenomanian layer are discovered in the Kara Sea. Non-industrial accumulations of oil and gas have been discovered in the Lower Cretaceous sediments of the western part of the Barents Sea shelf. However, the structure and oil and gas potential of the Lower Cretaceous sediments of the Barents-Kara shelf remain unexplored. Based on the seismic-stratigraphic and cyclostratigraphic analysis, a regional geological model of the Lower Cretaceous deposits of the Barents-Kara shelf was created, the distribution area and the main stages of the accumulation of clinoforms were identified. As a result of a detailed analysis of the morphology of clinoform bodies, paleogeographic conditions were restored in the Early Cretaceous and a forecast of the distribution of sandy reservoirs was given

scholarly journals Construction of a 3d geomechanical model and its influence on the dynamic indicators of a carbonate reservoir model

2021 ◽  
Vol 3 (1) ◽  
pp. 43-55
Author(s):  
D. B. Abishev ◽  
V. V. Shishkin ◽  
I. G. Alekhin ◽  
A. Z. Nasibullin
Keyword(s):  
Hydrodynamic Model ◽  
Oil And Gas ◽  
Three Dimensional ◽  
Carbonate Reservoir ◽  
Oil Field ◽  
Gas Content ◽  
Property A ◽  
Geomechanical Model ◽  
History Match ◽  
3D Geomechanical Model

The article presents the process and results of constructing a three-dimensional geomechanical model of an oil field located in the eastern edge of the Caspian basin. Oil and gas content is established in carbonate deposits of the Lower and Middle Carboniferous. The model was based on well log data, one-dimensional geomechanical models and a 3D geological model. The result of geomechanical modeling is the obtained property of additional permeability of the critically loaded discrete fracture network, which was later used in the history match of the hydrodynamic model. In addition to the fracture property, a series of conductive faults were also identified during the history match. When carrying out geomechanical modeling, international experience was taken into account in the calculation of critically loaded fractures and their relationship with the intervals of inflow and loss in carbonate reservoirs. The updated hydrodynamic model, taking into account the geomechanical model, significantly improved the convergence of the model and historical indicators of bottomhole pressures.

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 Oil and Gas Potential in the Territory of the South-Eastern Part of the Bukhara-Khiva Region

2021 ◽  
Vol 11 (4) ◽  
pp. 4699-4708
Author(s):  
Odiljon G. Khayitov ◽  
Gulnarakhon K. Salizhanova ◽  
Marhamat A. Mutalova ◽  
Sevara I. Aminzhanova ◽  
Malika Y. Mishareva
Keyword(s):  
Oil And Gas ◽  
High Capacity ◽  
Gas Condensate ◽  
Gas Content ◽  
Southeastern Part ◽  
Promising Target ◽  
Gas Fields ◽  
Gas Potential ◽  
Filtration Properties ◽  
Hydrocarbon Deposits

The article analyzes the oil and gas content of the southeastern part of the Bukhara-Khiva region. It is shown that this territory is the main promising target for prospecting for new oil, gas and hydrocarbon deposits. It was revealed that the main productive deposits are carbonate deposits. It has been established that the most widespread and large ones are massive deposits in traps of the structural-lithological type, confined to the Callovian-Oxfordian reef deposits and distinguished by high capacity and filtration properties. It is argued that the lower part of the reservoirs is flooded in all fields of this type. The characteristic is given of 44 open oil, oil and gas condensate, gas condensate and gas fields of the specified region. Pre-Jurassic deposits contain hydrocarbons. The features of the structural plans of carbonate and salt-anhydrite formations and their influence on the location of oil and gas deposits within the southeastern part of the Bukhara-Khiva region for increasing hydrocarbon reserves have been determined. The fields under development in the stage of deep drilling have been clarified. Recommendations for deepening geological exploration are offered.

scholarly journals OIL AND GAS PROSPECTS OF LOWER CRETACEOUS DEPOSITS OF SLICE CARPATHIANS

2010 ◽  
Vol 3 (0) ◽  
pp. 312-318
Author(s):  
L.S. Monchak ◽  
B.Y. Mayevskiy ◽  
V.R. Khomyn ◽  
S.S. Kurovets ◽  
T.V. Zderka ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Cretaceous Deposits

scholarly journals Conditions of the formation and filtration-capacitive properties of the lower cretaceous deposits of the Tavdinsk mega outshot in the Iussk oil and gas bearing region

2020 ◽  
pp. 53-62
Author(s):  
E. O. Dernova ◽  
E. A. Kapranova ◽  
J. V. Shcherbina
Keyword(s):  
Grain Size ◽  
Lower Cretaceous ◽  
Oil And Gas ◽  
Asymmetry Factor ◽  
Reservoir Properties ◽  
Average Grain Size ◽  
Capacitive Properties ◽  
Authigenic Mineral ◽  
Compaction Processes ◽  
Cretaceous Deposits

In the presented work, the differences of mechanisms of the formation of the Lower Gotterivian deposits are considered based on the results of lithological-petrophysical studies of core samples on 5 wells of Leushin’s (approx. 150 samples) and Vikulov’s (approx. 150 samples) assises. The area covered by the studies is located on the border of the Khanty-Mansi Autonomous Okrug and Sverdlovsk region. The differences in the mechanisms of the formation of the Vikulov’s and Leushin’s assises with the use of core macrodescription data, biofacies, granulometric, petrographic and X-ray structure analyses are considered and compared. The Lower Cretaceous deposits of the studied area are represented by alternating aleurolites and argillites with rare interbeds of sandstones. The granulometrical factors most commonly used for the interpretation of sedimentation environments, the median grain size (Md), the average grain size (Xcp), the sort factor (S0), the asymmetry factor (As) and the excesses (Ex), reflecting the main characteristics of the grains distribution, are considered. According to the granulometric analysis, bar graphs of the distribution of mass fractions in percent by fractions were built and analysed. For genetic interpretation, the CM Passega diagram, construction of which is based on the mechanism of particle transfer and directly depends on the flow dynamics, was used. Conclusions about the conditions of the deposits formation are made. The reservoir properties of detrital rocks are often influenced by many of the factors discussed above: the median grain size, sorting of the detrital part, composition, amount and type of cement, compaction processes, recrystallisation, bore-hole mining and authigenic mineral formation. Based on the studies carried out, the influence of various factors on reservoir properties was analysed.

scholarly journals THE ROLE OF MOLECULAR PHYSICS IN THE FORMATION AND PLACEMENT OF HYDROCARBON DEPOSITS IN OROGENIC FORMATIONS

2018 ◽  
pp. 23-29
Author(s):  
Yu. Ya. Bolshakov ◽  
E. Yu. Neyolova
Keyword(s):  
Porous Media ◽  
Oil And Gas ◽  
Capillary Forces ◽  
Gas Content ◽  
Hydrocarbon Accumulation ◽  
Molecular Physics ◽  
Water Saturated ◽  
Gas Fields ◽  
Hydrocarbon Deposits

The article considers the large gas fields geology aspects of which are totally in conflict with the principles of anticline theory of hydrocarbon accumulation. These fields are situated in orogenic formations and associated with large synclinal structures. Any seals and lateral screens are absent. Gas saturated reservoirs are surrounded by relatively large-porous water-saturated sandstones and retained in pools due to the capillary forces. The nature of these fields is determined by the molecular physics laws, which effect in oil-wet porous media. These areas are abundant within the geosynclinal systems where synclinal structures can be considered as perspective for oil-and-gas content.

OFFSHORE GIPPSLAND BASIN FIELDS

1971 ◽  
Vol 11 (1) ◽  
pp. 85 ◽  
Author(s):  
B. R. Griffith ◽  
E. A. Hodgson
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Oil Field ◽  
Gas Field ◽  
Field Development ◽  
Oil And Gas Field ◽  
Cumulative Production ◽  
Gippsland Basin ◽  
Offshore Field ◽  
Unconformity Surface

The offshore Gippsland Basin, underlies the continental shelf and slope between eastern Victoria and Tasmania.The basin is filled with up to 25,000' of sediment, varying in age from Lower Cretaceous to Recent. The Lower Cretaceous section is represented by at least 10,000' of nonmarine greywackes of the Strzelecki Group. The overlying sediments of Upper Cretaceous to Eocene age comprise the interbedded sandstones, siltstones, shales and coals of the Latrobe Group, with a cumulative thickness of about 15,000'. Offshore, the Latrobe Group is overlain unconformably by up to 1500' of calcareous mudstones of the Lakes Entrance Formation and up to 5000' of Gippsland Limestone carbonates. Pliocene to Recent carbonates, reaching a maximum thickness of about 1000', complete the sedimentary section of the basin.Australia's first commercial offshore field, the Barracouta oil and gas field, was discovered in the Gippsland Basin in February 1965. Further exploratory drilling over the following two and a half years led to the discovery of the Marlin gas field and the Kingfish and Halibut oil fields.The principal hydrocarbon accumulations are reservoired by sediments of the Latrobe Group within closed structural highs on the Latrobe unconformity surface. Seal is provided by the mudstones and marls of the Lakes Entrance Formation and Gippsland Limestone.A field development programme was initiated immediately after Barracouta had been confirmed as a commercial gas reservoir. By the end of 1967, the Barracouta 'A' platform had been erected. Construction and positioning of the Marlin, Halibut and the two Kingfish platforms followed.To date development drilling has been completed on the Barracouta and Halibut fields, while development of the Marlin field has been temporarily suspended following completion of four wells. Development of the Kingfish oil field which commenced in March 1970, is still in a relatively early stage.The Barracouta field has been producing gas and oil since March and October, 1969 respectively. The Marlin gas field was put on stream in November, 1969 and the Halibut oil field in March 1970. As yet no wells drilled in the Kingfish oil field have been completed for production.The four fields provide a major source of hydrocarbons for the Australian market. By the end of September, 1970 cumulative production of sales quality gas from the Barracouta and Marlin fields was almost 23 BCF. Cumulative production of stabilised oil from Barracouta was 2 million barrels and over 26 million barrels from Halibut.

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