High efficiency in-situ CO
            <sub>2</sub>
            generation technology: the method for improving oil recovery factor

Shakhverdiev, A. Kh.; Panahov, Geylani M.; Jiang, Renqi; Abbasov, Eldar M.

doi:10.1080/10916466.2022.2157010

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…the question of the presence of a gas agent is a factor limiting the scope of the water-gas method. Given these factors, the innovative technology of CO 2 generation in reservoir conditions is of particular interest [8][9][10], its essence is the use of chemical reagent solutions that will start a chemical reaction in reservoir conditions. The product of the reaction will be the generated CO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Of course, such a wide and successful application of the waterflooding technology is due to its own manufacturability during implementation, as well as the low cost and availability of large volumes of the agent injected into the reservoir -water. Along with high efficiency, non-stationary waterflooding technology creates serious problems in the development and operation of oil fields [1][2][3][4][5][6][7][8][9][10]. The problems are of both natural and technogenic origin, leading to premature breakthrough of injected or IOP Publishing doi:10.1088/1755-1315/1212/1/012038 2 formation water to production wells with subsequent watering of their production, which in turn provokes the formation of stagnant and poorly drained zones.…”

Section: Introductionmentioning

confidence: 99%

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Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Gorelkina,

Mugisho,

Kouadio

2023

IOP Conf. Ser.: Earth Environ. Sci.

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This article discusses reservoir pressure maintenance methods: flooding and SWAG technology. The accumulated experience of waterflooding technology introduction described in literature sources is analyzed. Identified such disadvantages of waterflooding as reservoir watering due to significantly low viscosity compared to the viscosity of reservoir oils and low oil recovery factor. A method for detecting and preventing the instability of the front of displacement of residual reserves by injected water is indicated. Particular attention is paid to the innovative method of reservoir stimulation, which consists in the generation of carbon dioxide in reservoir conditions. The essence of the technology, method of implementation, advantages compared to gas injection through injection wells are described. Water-gas methods are investigated. The advantage of SWAG technology with the use of pump-ejector systems in comparison with other modifications is proved and the results of the latest research are presented, which cover data on the characteristics of pump-ejector systems, the topical issue of the technology for obtaining water-gas mixtures and the processes of interaction of gas bubbles when pumping mixtures through wells into the reservoir, as well as ways to implement the technology, taking into account the geological and field conditions of potential targets for implementation. This analysis will allow you to correctly choose the method of stimulation of the reservoir and operate the facilities as efficiently as possible. It should be noted that the considered gas and water-gas methods involve the injection of carbon dioxide, associated, exhaust, flue gases into the reservoir, which makes these technologies the most attractive from an environmental point of view.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Gorelkina,

Mugisho,

Kouadio

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…8. ную фазовую проницаемость (а) и на нефтеотдачу (б) при вытеснении нефти водой [34]. Опыт показывает, что предотвратить или хотя бы прекратить увеличение роста гистерезисных явлений можно не только регулированием процесса заводнения, но активным применением химических технологий повышения нефтеотдачи и интенсификации добычи нефти [3,4,6,7,9,18,20,21,23,25,26,27,28,29,33,30,39,40].…”

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Negative impact of hysteresis phenomena on the oil and gas field development process

Shakhverdiev,

Arefiev

2024

BRANS

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It is known that irreversibilities of hysteresis nature of global or local scale, lead to the necessity to revise the methods of solving the main problems of hydrodynamic modelling and analysis of dynamic systems, as they can radically affect the traditional conclusions and practical recommendations. It is assumed that in the steady-state mode of motion or filtration, phase displacements make all sorts of oscillations in the vicinity of the unstable position, due primarily to irreversible hysteresis phenomena and jumps arising from the instability of the front of oil displacement by water, the manifestation of capillary effects, hysteresis of phase transitions, irreversibility of deformations under excessive load at large pressure drops, including hydraulic fracturing. With this purpose in the theory of catastrophes the dynamic models of growth are investigated and control parameters are selected with the calculation and the possibility to predict the expected local irreversibilities and instabilities before the onset of bifurcation. Hysteresis behaviour in the filtration process is generated by lithological differences of geofluidodynamic medium and its geological and physical characteristics and properties of saturating fluids. And as a rule, it is provoked by not always adequate, excessive external load on the tested medium. The proposed solutions are part of a new concept of unsteady waterflooding, which provides for early prediction and taking measures in case of instability of the displacement front and, as a consequence, water breakthrough into production wells. It is of great interest to prevent the consequences of these negative effects on the quantitative components of technological and economic indicators, in the case of oil field development we are talking about the final recovery factor of oil, gas and condensate. System optimisation of oil field development is designed for a certain technological and economic effect, including additional oil production, effective mobilisation and saving of injected and withdrawn water and gas.

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Technology for the development of residual reserves by water-gas methods in conditions of associated petroleum gas shortage

Drozdov,

Gorelkina

2024

E3S Web Conf.

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A method for injecting a water-gas mixture is proposed, which takes into account the distribution of reserves in a formation anisotropic in permeability. A schematic diagram of a device for pumping a mixture into a formation is presented. The proposed technology is based on obtaining a water-gas mixture with maximum gas content. This requires a device consisting of several pump-ejector systems. Booster pump-ejector systems pump a water-gas mixture saturated with oil gas into selected wells that open up significant volumes of residual reserves. In areas with small volumes of reserves, it is proposed to inject solutions of chemical reagents to release carbon dioxide in the formation. This solution will increase oil recovery by implementing the injection of the mixture in the most rational way and reduce damage from associated gas flaring. For greater efficiency of water-gas mixture injection, it is necessary to select the composition of the water-gas mixture (the composition of water and the injected gas), which helps to suppress the coalescence of gas bubbles in the conditions of the selected field. In order to clarify the injection parameters, it is recommended to conduct mineralization studies and studies of the settling rate of the water-gas mixture column depending on the composition of the injected gas.

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High efficiency in-situ CO ₂ generation technology: the method for improving oil recovery factor

Cited by 3 publications

References 21 publications

Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Negative impact of hysteresis phenomena on the oil and gas field development process

Technology for the development of residual reserves by water-gas methods in conditions of associated petroleum gas shortage

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High efficiency in-situ CO 2 generation technology: the method for improving oil recovery factor

Cited by 3 publications

References 21 publications

Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Waterflooding, water-gas method and generation of carbon dioxide in the reservoir – methods of enhanced oil recovery and technology development

Negative impact of hysteresis phenomena on the oil and gas field development process

Technology for the development of residual reserves by water-gas methods in conditions of associated petroleum gas shortage

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High efficiency in-situ CO ₂ generation technology: the method for improving oil recovery factor