scholarly journals HYDROGEOLOGICAL CONDITIONS OF THE ZAPOLYARNOYE OIL AND GAS CONDENSATE FIELD

2017 ◽  
pp. 6-10
Author(s):  
V. A. Beshentsev ◽  
R. N. Abdrashitova ◽  
N. K. Lazutin
Keyword(s):  
Oil And Gas ◽  
Water Pressure ◽  
Gas Condensate ◽  
Pressure System ◽  
Hydrogeological Conditions

Hydrogeochemical conditions of the Zapolyarnoye oil and gas condensate field are discussed in the paper. These conditions of Mesozoic basin are important in the formation and preservation of oil and gas deposits. An explanation is given for the presence of the hydrocarbonate-sodium type of waters in the Neocomian hydrogeo-logical complex. It is shown, that the field belong to the Elysion geodynamic a water pressure system - Omsk-Gydansk structural zone, in particular to the northern part - the Yamal-Gydan lineaments.

scholarly journals GROUNDWATER OF THE MESOZOIC HYDROGEOLOGICAL BASIN IN THE TERRITORY OF THE ETY-PUROVSKY OIL AND GAS FIELD

2018 ◽  
pp. 6-11
Author(s):  
V. A. Beshentsev ◽  
R. N. Abdrashitova ◽  
N. K. Lazutin ◽  
I. G. Sabanina ◽  
A. A. Gudkova
Keyword(s):  
Oil And Gas ◽  
Water Pressure ◽  
Gas Field ◽  
Pressure System ◽  
Hydrogeological Conditions ◽  
Oil And Gas Field ◽  
Vertical Zoning

The article considers hydrogeological conditions of the Ety-Purovsky oil and gas field. The authors describe hydrogeological stratification of the field and its hydrogeochemical conditions. These conditions reveal the existence of classical vertical zoning. The research pays attention to the important role of an elution water pressure system in the formation of the hydrogeochemical and hydrogeodynamic fields structure.

scholarly journals HYDROGEOCHEMICAL CONDITIONS OF THE MESOZOIC HYDROGEOLOGICAL BASIN IN THE TERRITORY OF THE YARUDEY OIL AND GAS CONDENSATE FIELD

2018 ◽  
pp. 15-20
Author(s):  
V. A. Beshentsev ◽  
I. G. Sabanina ◽  
O. G. Beshentseva ◽  
R. N. Abdrashitova
Keyword(s):  
Oil And Gas ◽  
Water Pressure ◽  
Base Plate ◽  
Gas Condensate ◽  
Sodium Ion ◽  
Salt Composition ◽  
Pressure System ◽  
Underground Waters

Hydrogeochemical conditions of the Yarudey oil and gas condensate field are largely determined by its position within the elysion lithostatic water pressure system and the presence of a large number of faults in the base plate. In the article we explore the main features of the Neocomian and the Jurassic hydrogeological complexes of the field. Underground waters of the Mesozoic hydrogeological basin are characterized by chloride sodium ion-salt composition. They belong to the hydrocarbonate sodium type according to V. A. Sulin’s classification, mineralization is 7,0 g/l in the Neocomian complex and is 11,1 g/l in the Jurassic complex. The existence of complex hydrogeochemical conditions is confirmed by the nature of the change in the genetic sodiumchlorine coefficient (up to 1,4) and boron-bromine coefficients (up to 0,49).

scholarly journals Role of elision water exchange in formation of the Yamalo-Kara depression hydrodynamic field

2019 ◽  
pp. 248-261
Author(s):  
D. A. Novikov
Keyword(s):  
Water Exchange ◽  
Oil And Gas ◽  
Water Pressure ◽  
Hydrodynamic Characteristics ◽  
Gas Generation ◽  
Pressure System ◽  
Stage Of Development ◽  
Capacitive Properties ◽  
Unique Material

The unique material has been compiled on the hydrodynamics of oil and gas deposits of the Yamalo-Kara Depression for the first time in the last 30 years. The main feature of the region is the wide development of abnormally high formation pressures (Ka to 2.21) in both Jurassic and Lower Cretaceous horizons. Studying the filtration-capacitive properties and hydrodynamic characteristics of the Jurassic-Cretaceous reservoirs allows to established the predominate role of the elision water exchange in the formation of the modern hydrodynamic structure. At the depth of about 2–2.5 km elisional lithostatic system begins to acquire the features of elisional thermo-dehydration system. The extensive zones of piezomaxima (Bolshekhetskaya and Karskaya megasyneclise) at the present stage of development of the water-pressure basin system became internal areas of water pressure (supply) with a maximum degree of hydrogeological closeness. The vast zones of piezomaxima (the Bolshekhetskaya and Karskaya megasyneclises) became the inner regions of water pressuring (feeding) with the maximal degree of hydrogeological closeness of the interior at the current stage of the development of the water-pressure system in the basin. The areas of piezominima extending along the main sites of oil and gas generation are related to the largest zones of oil and gas accumulation (Vankoro-Suzunskaya, Bovanenkovskaya, Urengoyskaya and others). Currently, two types of natural water-pressure systems has been established in the region under investigation: elision in the inner regions (dominating within the Yamalo-Kara depression) and infiltration — in the basin margins of the West Siberian sedimentary basin.

scholarly journals Hydrogeological characteristics of the Lower Cretaceous terrigenous complex of the Karkinit-Northern Crimean deep in the aspect of its potential for oil and gas presence

2018 ◽  
Keyword(s):  
Chemical Composition ◽  
Lower Cretaceous ◽  
Oil And Gas ◽  
Water Pressure ◽  
Joint Stock Company ◽  
Formation Pressure ◽  
Pressure System ◽  
Composition Formation ◽  
Hydrogeological Characteristics ◽  
Clay Rocks

Purpose. To substantiate the prospects for oil and gas presence in the Lower Cretaceous sediments of the Karkinit-Northern Crimean deep based on hydrogeological (hydrogeochemical, gas-hydrogeochemical and geobaric) features. Methodology. Investigations of formation waters and water-dissolved gases were based on the methods of chemical, elementary spectral and gas chromatographic analyses executed at the laboratories of subsidiary joint-stock company "Chornomornaftogaz", subsidiary "Crimean Geology" and the Institute of Geology and Geochemistry of Combustible Minerals of NASU. For the comparison of formation pressure we applied the hydrostatic coefficient (Ch). Ch is the ratio of measured formation pressure to conditionally hydrostatic at the depth of the measuring with γ=1.000 (Рf/Рch), which eliminates the influence of uneven depths of measurement and different water densities, that is, to get the reduced value. For processing materials Excell, Corell Draw and Surfer are used. Results. Regional features of formation waters in the Lower Cretaceous complex as well as their chemical composition formation conditions are established. According to retrospective data analysis on the Crimean Plains, using the information received on the Black Sea shelf, we come to a conclusion that formation waters of the Lower Cretaceous complex are mainly sedimentogenic. The sulfate-natrium (S.Na) waters of the basal horizon and the Lower Cretaceous aquiferous complex most likely are infiltrative. This is evidenced by the decrease in the indicators of metamorphism of rCa/rMg, r(Cl-Na)/rMg and the increase in Cl/Br to over 1000, the lowered content of iodine (J) and bromine (Br). Infiltrative (paleoinfiltrative) waters mixed with primary sedimentogenic waters. This was accompanied by the decrease in their mineralization and thalassogenic trace elements contents in them. Modern infiltration from the land of meteoric waters at depths of more than 2000–3000 meters through the hydrodynamic barriers of the elision water drive system is impossible, but it could be realized at the continental infiltration stages of the foreground development and before the late Cretaceous time. This is evidenced by the continuous continental conditions marked by denudation of rocks. The main processes in the chemical composition formation of formation waters of Cretaceous and Lower Cretaceous complexes could have been: leaching rocks, mixing of infiltrative fresh or saline waters with thalassogenic waters; mixing of these waters with waters of the high temperature (>2000C) dehydration of clay rocks with formation of non-infiltrative (S.Na) and (Hyd.Car.Na) waters. Based on the analysis of the hydrostatic coeficient distribution (Ch) in the basal and Lower Cretaceous aquiferous complexes the existence of the elision water pressure system within the Karkinit-Northern Crimean deep is confirmed. The cause of overhydrostatic pressures is most likely to be the dehydration of clay rocks and the intrusion of deep gases. Geobaric conditions and filtration parameters suggest that the water flows of the elision water pressure system can move from the deepest parts of the Karkinit-Northern Crimean deep towards its sides. Originality and practical significance. The nature and forming conditions of formation waters have been substantiated. According to gas-hydrogeochemical and geobaric features it was possible to distinguish localities promising for hydrocarbon prospecting in the Lower Cretaceous deposits.

scholarly journals Investigation of the influence of the carbon dioxide (CO2) injection rate on the activity of the water pressure system during gas condensate fields development

2021 ◽  
Vol 230 ◽  
pp. 01011
Author(s):  
Serhii Matkivskyi ◽  
Oleksandr Kondrat ◽  
Oleksandr Burachok
Keyword(s):  
Carbon Dioxide ◽  
Water Pressure ◽  
Gas Production ◽  
Gas Condensate ◽  
Co2 Injection ◽  
Final Decision ◽  
Water Production ◽  
Carbon Dioxide Injection ◽  
Pressure System ◽  
Water Contact

The development of gas condensate fields under the conditions of elastic water drive is characterized by uneven movement of the gas-water. Factors of hydrocarbon recovery from producing reservoirs which are characterized by the active water pressure drive on the average make up 50-60%. To increase the efficiency of fields development, which are characterized by an elastic water drive, a study of the effect of different volumes of carbon dioxide injection at the gas-water contact on the activity of the water pressure system and the process of flooding producing wells was carried out. Using a three-dimensional model, the injection of carbon dioxide into wells located at the boundary of gas-water contact with flow rates from 20 to 500 thousand m3/day was investigated. Analyzing the simulation data, it was found that increasing the volume of carbon dioxide injection provides an increase in accumulated gas production and a significant reduction in water production. The main effect of the introduction of this technology is achieved by increasing the rate of carbon dioxide injection to 300 thousand m3/day. The set injection rates allowed us to increase gas production by 67% and reduce water production by 83.9% compared to the corresponding indicators without injection of carbon dioxide. Taking into account above- mentioned, the final decision on the introduction of carbon dioxide injection technology and optimal technological parameters of producing and injection wells operation should be made on the basis of a comprehensive technical and economic analysis using modern methods of the hydrodynamic modeling of reservoir systems.

Hydrogeological conditions of the Mesozoic hydrogeological basin within the Russkoye gas and oil field

2020 ◽  
pp. 20-35
Author(s):  
V. A. Beshentsev ◽  
Yu. I. Salnikova ◽  
S. V. Vorobjeva
Keyword(s):  
Oil And Gas ◽  
Water Pressure ◽  
Regional Distribution ◽  
Geological Structure ◽  
Oil Field ◽  
Natural Conditions ◽  
Gas Field ◽  
Pressure System ◽  
The Earth ◽  
Oil And Gas Field

The article is devoted to the hydrogeochemical conditions of the Mesozoic hydrogeological basin within the Russkoye oil and gas field. The text gives valuable information on the natural conditions, geological structure, geotemperature regime of the bowels of the Earth and the composition of groundwater of the Aptian-Albian-Cenomanian, Neocomian, and Jurassic hydrogeological complexes. The change in the composition of groundwater in the section of the AptianAlbian-Cenomanian complex has been revealed. Vertical inversion zoning that traces the underlying the Neocomian complex is established. We describe the main features of the regional distribution of reservoir pressures. Hydrodynamic schemes of the Aptian-Albian-Cenomanian, Neocomian, and Jurassic hydrogeological complexes are given in the article. These schemes show that the Russkoye gas and oil field is located in the zone of low reservoir pressures. The above vertical inversion zoning and low reservoir pressures are associated with the location of the field within the elisional hydrodynamic water pressure system of the Yamal-Gydan lineaments. The data of the block-fault model of the considered field were used in the course of the study. The block-fault structure predetermined the migration of hydrocarbons and the formation of tectonically screened deposits.

scholarly journals Aspects of wastewater disposal at the Yamsovey oil and gas condensate field

2019 ◽  
pp. 19-29 ◽  
Author(s):  
Yulia I. Salnikova ◽  
Vladimir A. Beshentsev ◽  
Rimma N. Abdrashitova
Keyword(s):  
Thermodynamic Modeling ◽  
Oil And Gas ◽  
Chemical Processes ◽  
Gas Condensate ◽  
Treated Wastewater ◽  
Formation Water ◽  
Geochemical Composition ◽  
Wastewater Disposal ◽  
Hydrogeological Conditions ◽  
Physical And Chemical

The article is devoted to the ecological and hydrogeological conditions of the Aptian-Albian-Cenomanian hydrogeological complex. This complex is targeted for pumping wastewater at the Yamsovey oil and gas condensate field. We have studied the geochemical composition of groundwater of the Mesozoic hydrogeological basin and injected fluids at the field. In the article we compare the results of chemical analyzes of wastewater with limited components according to the regulatory documentation. Also, we have performed the thermodynamic modeling of physical and chemical processes when mixing treated wastewater and formation water from the absorbing horizon in order to assess their compatibility. The obtained results are presented in the article.

scholarly journals Prospects of long-term development of Shebelynka gas-condensate deposit in conditions of stocks recovery

2019 ◽  
Keyword(s):  
Water Pressure ◽  
Gas Production ◽  
Gas Condensate ◽  
Water Flooding ◽  
Reservoir Pressure ◽  
Pressure System ◽  
Gas Recovery ◽  
Slowing Down ◽  
The Earth

The work is aimed to study the gas recovery stabilization prospects in Ukraine on the existing deposits due to renewable processes concerning gas reserves. The article reviews and analyzes the main results in the Shebelynka gas condensate field (GCF) development from the point of view of its water flooding.It is possible to restore the gas reserves in the assumption that they are being developed due to the gas flow from deep horizons. In detail, all factors are taken into consideration, which influences the formation pressure in the process of deposits development. The work presents analysis of the water pressure system in the Shebelinka GCF, the results of the calculation of reserves of edge water (water pressure system of the field is limited), investigates the dynamics of water flooding (intrusion of water in gas deposits) and the role of capillary forces in slowing down the advance of the water front. It was shown that water flooding practically does not affect the development of gas depletion, and the reservoir pressure-decline rate is slowing down both under the influence of known factors and due to the flow of gas through tectonic disruptions, especially in the core deposit. It is proved that when the annual gas consumption is reduced to 1800-1900 million 3, it will be fully compensated by the crossflow of gas. The graphic forecast of gas recovery till 2040 is presented in variants without compressor and compressor opening since 2019, taking into consideration the reserves stock. It has been calculated that with introduction of the planned new compressor station at Shebelinka GCF annual gas production in the period of 2020-2040 will be maintained at 2.4-2.1 billion cubic meters and additional gas extraction for the period 2019-2036 is - 6.5 billion m3. During the development of the field, depression between the main reservoir and the deep horizons of carbon will increase, that might increase the volume of gas crossflow and accelerate the degassing of the Earth, taking into account presence of macro- and micro-tectonic faults. Considering the possibility of a long-term development in the Shebelinka GCF, it is necessary to pay special attention to the fund of wells, its updating, repair or use as a means for receiving the heat from the Earth. The phenomenon of restoration of gas reserves at the Shebelinka GCF, which was established by researches, is promising for other deposits of Ukraine and needs further special researches, on separate objects. Object of research: Shebelinka gas condensate field. Gas extraction and processes for maintaining reservoir pressure, including through the gas crossflow of gas from the deep horizons of tectonic disturbances. Subject of the study: Analysis and forecast of gas production in the future for various options for development, both compressor and non-compressor exploitation of the deposit, taking into consideration maintenance of reservoir pressure and stock reserves.

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