Software for Determining Residual Oil Reserves in Oil Deposit Development

Mirzaev, Sayibdjan; Tukhtanazarov, D.; Karimova, Khabiba; Samadov, N.

doi:10.1088/1757-899x/883/1/012119

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Let us substitute the approximations of the differentials of the function in time and coordinate (11) and (12) and the displacement function (13) into the differential equation (8), obtaining:…”

Section: Solution Methodsmentioning

confidence: 99%

“…Rashidov's dynamic theory [7,11]. G. De Martino et al [12] and V. Corrado et al [13][14][15] developed models of the pipe-soil interaction, taking into account the finite length of the pipeline. Assuming a linear elastic model of soil motion and ignoring the slip at the pipe-soil contact interface, the model analyzes the dynamic behavior of a finite-length pipeline taking into account the boundary conditions at the ends.…”

Section: Introductionmentioning

confidence: 99%

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Numerical solution of problem of longitudinal vibration of underground pipeline by the method of finite differences

et al. 2023

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This paper analyzes the dynamic response of a wave propagating to the soil horizontally through a pipe. That is, the state considers a linear viscoelastic model of the interaction of the "pipe-soil" system. This problem is solved using the numerical method of differential equations. The longitudinal wave in the ground is taken as a sinusoid. And also, in the article, we will compare the comparative analysis of the results for some values of the coefficients of elasticity and viscosity of taste, propagation velocity, and pulse duration. In the current flow of the "pipe-soil" system, reflections of waves propagating in an underground pipeline at the boundaries of the pipeline, usually propagating in soils. This leads to a change in the shape of the underground pipeline, the value of which can double. The viscosity coefficient of interaction at the "pipe-soil" system contact leads to attenuation of the wave front in the underground pipeline. For soils with values of viscous interaction coefficient more than 100 kN·s/m2, this may lead to complete attenuation of the bursts at the wave front in the pipeline. The ratio of steps along the coordinate and time equal to the propagation of waves in the pipeline, obtaining results that coincide with the exact nature.

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Section: Solution Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical solution of problem of longitudinal vibration of underground pipeline by the method of finite differences

et al. 2023

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“…They are defined by attributes, procedures, and rules that reflect the general properties of the structure of algorithmic banks. Therefore, it is called the structure model of algorithmic banks [12][13][14][15][16][17].…”

Section: Methodsmentioning

confidence: 99%

Generalized models of a production system of fuzzy conclusion

et al. 2023

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The aim of the research is to study the models, rules, and fuzzy inference engines, which occupy the main place in the knowledgebase, and models of the logic inference engines and simulation modeling, focused on supporting the adoption of semi-structured decisions under uncertainty. This implies the relevance of the task of developing theoretical and methodological tools that provide automation of the processes of fuzzy inference systems. Research methods are the theory of fuzzy sets and fuzzy logic. New scientific results are the design and formation of a set of production rules from a given set of admissible ones, with specific values of conditions and conclusions for describing three types of fuzzy models of the processes and tasks under study. Using modules of standard algorithms and programs, algorithms and a program for solving problems of fuzzy inference systems and making semi-structured decisions based on the constructed fuzzy logic model were developed. This problem is solved by formalization methods based on the theory of algorithmization, fuzzy sets, and fuzzy inference.

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“…T.R. Rashidov [7,11], G. De Martino et al [12] and V. Corrado et al [13,14] developed models of the pipe interaction with soil, taking into account the limited length of the pipeline. Assuming a linear elastic model of soil motion and ignoring slippage at the pipe-soil contact, the model analyzes the dynamic behavior of a finite-length pipeline taking into account the boundary conditions at the ends.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal vibrations of underground pipelines of finite length with account for the node weight on the ends

Shadmanova

Karimova²,

Khusainov³

et al. 2022

J. Phys.: Conf. Ser.

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The paper presents an analysis of the dynamic response of an underground main pipe under the action of longitudinal wave, propagating in soil along the pipe. The outer surface of the pipeline is in contact with soil along the pipeline axis according to the elastic- viscous law, and the ends of the pipeline are connected to massive nodes by elastic elements. Using the Fourier method, an analytical solution to the problem of longitudinal vibration of an underground pipeline, pliantly fixed by nodes at its ends, is obtained. The problem of longitudinal vibration of an underground pipeline with visco-elastically fixed nodes at the ends is solved numerically. Longitudinal wave in soil is taken as a traveling sine wave. The paper presents a comparative analysis of the results for some values of seismic wavelengths, the ratio of the wave propagation velocity in soil and in the pipeline, the coefficients of elastic and viscous interaction. The viscosity coefficient of interaction at the "pipe-soil" system contact leads to attenuation of the wave front in the underground pipeline. For soils, the values of the viscous interaction coefficient of more than 100 kN⋅s/m2, may lead to complete attenuation of the bursts at the wave front in the pipeline.

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Software for Determining Residual Oil Reserves in Oil Deposit Development

Cited by 7 publications

References 7 publications

Numerical solution of problem of longitudinal vibration of underground pipeline by the method of finite differences

Numerical solution of problem of longitudinal vibration of underground pipeline by the method of finite differences

Generalized models of a production system of fuzzy conclusion

Longitudinal vibrations of underground pipelines of finite length with account for the node weight on the ends

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