Improving the controllability and effectiveness of the chemical-technological process of the technology for hydrogen thermobaric chemical stimulation of hydrocarbon recovery

Kravchenko, Oleg; Veligotskyi, Dmytro; Bashtovyi, Artem; Veligotska, Y.

doi:10.15587/1729-4061.2019.188615

Cited by 4 publications

References 11 publications

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Development of a Methodology for Calculating the Stress State and Resource of a Hydrogen Generator Using the Finite Element Method

Hontarovskyi¹,

Smetankina²,

Garmash³

et al. 2022

J. of Mech. Eng.

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An experimental stand was created to study the thermobaric and chemical influence of hydrogen on the identification of hydrocarbon production. The said stand allows to reproduce chemical-technological processes as close as possible to real formation ones. This stand makes it possible to study the kinetics of not only hydrogen, thermobaric and chemical effects, but also other thermal gas chemical processes, including hydrogen generation. The main element of the experimental stand is a hydrogen generator, the components of which work at high pressures and temperatures under conditions of hydrogen embrittlement of mechanical properties and an aggressive environment that causes corrosion of its inner surface. Based on this, the development of a methodology for calculating the thermal stress state of the generator, its strength under hydrogen embrittlement conditions, and its resource becomes relevant. Based on the finite element method, a methodology for calculating non-stationary temperature fields and the thermal stress state that occur in the hydrogen generator during thermobaric and chemical processes of varying intensity is proposed. The methodology allows to take into account the features of the geometry of the structure, the time-varying temperature and pressure distributions of the reaction products, the temperature dependence of the thermophysical and mechanical properties of the hydrogen generator material. Thanks to the application of the developed software, a study of the hydrogen generator thermal stress state during two real thermobaric and chemical processes of different intensity was carried out. Graphs of temperature and pressure changes of the reaction products of hydroreactive substances in the generator over time, which were registered during the experiment conduction, were used. The distribution of non-stationary temperature fields and stresses in the hydrogen generator elements was obtained. Areas of maximum load of generator elements are defined. It was established that during the flow of the studied thermobaric and chemical processes, pressure makes a greater contribution to the thermal stress state. The obtained results and the developed theory and software can be used in the study of generators of other designs with other thermobaric and chemical processes occurring in them.

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Development of a Methodology for Calculating the Stress State and Resource of a Hydrogen Generator Using the Finite Element Method

Hontarovskyi¹,

Smetankina²,

Garmash³

et al. 2022

J. of Mech. Eng.

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Increasing the Effectiveness of the Complex Hydrogen Thermobaric Chemical Effect Technology for Stimulation of the Production of Hydrocarbons by Using Polymer Paracyanogen

Kravchenko

Veligotskyi

Homan

et al. 2023

Inter J Ener Clean Env

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The research is focused on increasing the manageability and effectiveness of the technology of complex hydrogen thermobaric chemical effect (CHTBCE) to increase the production of hydrocarbons from oil and gas wells. It is demonstrated that the basic chemical-technological process of this technology is ineffective because both the temperature level and the duration of its high-temperature stage are insufficient for generating hydrogen and effecting partial hydrocracking of heavy hydrocarbons. This limiting stage of the process can be overcome by using the physico-chemical activation technique. Experiments have demonstrated that these problems can be solved by adding polymer paracyanogen to the composition of basic process fluids as a combustion activator. The dispersing and the mechanochemical activation of paracyanogen into a particle size range of 1-5 μm, combined with simultaneous homogenization of the "activator-liquid suspension medium" system, were conducted using the hydrocavitation activation method. Experiments have shown that the optimal amount of 0.7% to 0.95% mass of paracyanogen as a combustion activator in process fluids can increase and sustain the temperature level during the high-temperature stage of the process. This can be sufficient for generating hydrogen from hydroreactive agents to effect the process of hydrocracking heavy hydrocarbons.

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Improving the Technology of Complex Hydrogen Thermobarochemical Treatment CHTBCE for Effective Use in Oil Wells With Weakly Consolidated Sandy Reservoirs

Kravchenko,

Veligotskyi,

Agaev

2023

Day 1 Tue, November 21, 2023

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Today, it is common practice to produce oil from failure-prone, weakly cemented reservoirs. The operators’ desire to increase production requires operating wells at their maximum capacity, and therefore leads to more aggressive drainage of the reservoirs with high oil flow from the pay zone to the well bore. At the same time, the oil filtration rate increases significantly, especially in the near well bore zone. This promotes the active movement of rock particles together with the production from the bottomhole formation zone to the well bore. Sand movement to the well bore and removal into the well itself leads to many unfavourable consequences, such as reservoir disintegration, up to the collapse of the reservoir roof, blocking of filtration channels in the bottomhole formation zone (BFZ), accumulation in the well bore with an overlap of the productive interval. All this prevents the product from entering the well, leading to abrasive wear, pumping equipment failure, etc. These factors affect the quality of the filtration properties of the bottomhole formation zone, disrupt the hydrodynamic link between the productive formation and the well bore, resulting in its productivity drop. To date, there are several technologies aimed at consolidating the bottomhole formation zone and preventing sand removal. They are used depending on the design of the bottomhole, the time of operation, the geological and temperature parameters, the mechanical, and the chemical and combined methods of securing the formation rocks in the bottomhole zone of the wells. As a rule, the use of these technologies leads to a decrease in the filtration-capacitance properties (FCP) of the reservoir. These technologies fail to solve other common problems of well flow rate reduction, such as colmatization, asphalt-resin-paraffin deposition (ARPD), FCP reduction by oil-water emulsions, etc. At the same time, the methods of complex impact on the reservoir are now widespread to increase well productivity. Their application during one technological treatment exertsa multifactor physical and chemical effect on the rock and its saturating fluids, with several flow rate reduction factors being eliminated simultaneously. The controllability of the physicochemical processes employed in the oil production enhancement methods (OPEM) opens up prospects for their use to improve FCP with simultaneous reservoir consolidation.

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Improving the controllability and effectiveness of the chemical-technological process of the technology for hydrogen thermobaric chemical stimulation of hydrocarbon recovery

Cited by 4 publications

References 11 publications

Development of a Methodology for Calculating the Stress State and Resource of a Hydrogen Generator Using the Finite Element Method

Development of a Methodology for Calculating the Stress State and Resource of a Hydrogen Generator Using the Finite Element Method

Increasing the Effectiveness of the Complex Hydrogen Thermobaric Chemical Effect Technology for Stimulation of the Production of Hydrocarbons by Using Polymer Paracyanogen

Improving the Technology of Complex Hydrogen Thermobarochemical Treatment CHTBCE for Effective Use in Oil Wells With Weakly Consolidated Sandy Reservoirs

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