Karev Vladimir, Doctor of Engineering. His research interests are geomechanics, theory of filtration, and fracture of geomaterials. Belgian Award "Merite de L'invention» for merits in invention. V.Karev is a member of the Presidium of the National Committee of Theoretical and Applied Mechanics, Scientific Secretary of it. He is the author of more than 150 works, including in the journals Q1, Q2 and 10 patents.Kovalenko Yuri, Doctor of Physics and Mathematics, a prominent specialist in the field of geomechanics. His research interests are geophysics, geomechanics, theory of filtration, and fracture of geomaterials. Yu. Kovalenko is an expert in the field of mechanics of solids, the author of more than 150 scientific publications, including in the journals Q1, Q2.

• Chapter 1: Analysis of existing approaches to solving the problem of sand production during the operation of UGS wells.- Chapter 2: Experimental facilities for studying the deformation and strength properties of rocks and geomechanical modelling.- Chapter 3: Methodology for performing TILTS experiments to study the deformation, strength and filtration properties of rocks.- Chapter 4: Results of TILTS testing of the deformation, strength and filtration characteristics of reservoir rocks at uderground gas storage facilities based on triaxial tests.- Chapter 5: Geomechanical modelling of the stress-strain state in UGS reservoirs during cyclic changes in reservoir pressure and downhole pressure.- Chapter 6: Physical modelling programs of rock deformation and fracture in the near-wellbore zone of USG during gas injection and extraction.- Chapter 7: Results of physical modelling of deformation and filtration processes in the bottomhole zone of ugs wells during gas extraction and injection.- Chapter 8: Rationale for the possibility of using the directed unload reservoir method (DUR method) to increase rock permeability in the bottomhole zone of UGS wells.- Chapter 9: Justification of predictive recommendations for maximum and minimum allowable drawdowns, well flow rates and prevention of sand production.

Karev Vladimir, Doctor of Engineering. His research interests are geomechanics, theory of filtration, and fracture of geomaterials. Belgian Award "Merite de L'invention» for merits in invention. V.Karev is a member of the Presidium of the National Committee of Theoretical and Applied Mechanics, Scientific Secretary of it. He is the author of more than 150 works, including in the journals Q1, Q2 and 10 patents.Kovalenko Yuri, Doctor of Physics and Mathematics, a prominent specialist in the field of geomechanics. His research interests are geophysics, geomechanics, theory of filtration, and fracture of geomaterials. Yu. Kovalenko is an expert in the field of mechanics of solids, the author of more than 150 scientific publications, including in the journals Q1, Q2.

• Chapter 1: Analysis of existing approaches to solving the problem of sand production during the operation of UGS wells.- Chapter 2: Experimental facilities for studying the deformation and strength properties of rocks and geomechanical modelling.- Chapter 3: Methodology for performing TILTS experiments to study the deformation, strength and filtration properties of rocks.- Chapter 4: Results of TILTS testing of the deformation, strength and filtration characteristics of reservoir rocks at uderground gas storage facilities based on triaxial tests.- Chapter 5: Geomechanical modelling of the stress-strain state in UGS reservoirs during cyclic changes in reservoir pressure and downhole pressure.- Chapter 6: Physical modelling programs of rock deformation and fracture in the near-wellbore zone of USG during gas injection and extraction.- Chapter 7: Results of physical modelling of deformation and filtration processes in the bottomhole zone of ugs wells during gas extraction and injection.- Chapter 8: Rationale for the possibility of using the directed unload reservoir method (DUR method) to increase rock permeability in the bottomhole zone of UGS wells.- Chapter 9: Justification of predictive recommendations for maximum and minimum allowable drawdowns, well flow rates and prevention of sand production.