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Modelling of
operation indicators of gas storages in aquifers of massif type
O.V. Inkin1*,
N.І. Dereviahina2, Yu.V. Hriplivec2
1 Dnipro University
of Technology, Institute for Physics of Mining Processes the National
Academy Sciences of Ukraine, Dnipro, Ukraine
1* Corresponding
author: e-mail: inkin@ua.fm
2 Dnipro University
of Technology, Dnipro, Ukraine
Physical and
technical problems of mining production, 2020, (22), 31-45.
https://doi.org/10.37101/ftpgp22.01.003
full
text (pdf)
ABSTRACT
Purpose. Creation of
a mathematical model which allows calculating main hydrodynamic parameters
of a gas storage in an aquifer of a massif type considering the influence of
movement of gas-water contact along the vertical and well inflow change in
time.
Methodology. A numerical
algorithm of calculation of gas-hydrodynamic indicators of operation of
storages of gaseous hydrocarbons in dome water-bearing structures is justified
and realized. A method of asymptotic external and internal expansions is used for justification and realization.
Results. A balance
evaluation of filling of sloping aquifer of massif type of Leventsov area with natural gas is
performed. Also, the average pressure of a gas zone (7.5 – 10.5
MPa), the volume of stored gas reduced to normal condition (0.5 – 3 billion
m3), and lowering of gas-water contact during pumping in,
storing and extraction of gaseous hydrocarbons are determined.
Scientific
novelty. A numerical hydrodynamic model of underground gas storage,
created in an aquifer of a massif type is developed and verified. The model
allows considering a shape of a dome seam part and influence of restrained
gas adepter mining a position of surface of gas-water
contact. The suggested model can be used for
calculating the operation indicators of gas storage in a horizontal
aquifer.
Practical
significance. The program for calculating main hydrodynamic parameters of
underground gas storages in aquifers of dome structure is
created in Mapple software. The program
allows determining technical and economic indicators of operation of
storages at the design stage what can be used
during drawing business plans and investment offers on seasonal
accumulation of gaseous hydrocarbons in natural conditions.
Keywords: underground
gas storage; aquifer; dome structure; modeling;
gas-water contact.
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