Estimating the strength and elasticity of rocks in the Dagi formation on the Sakhalin shelf

Zhukov, Vladislav; Ltd, «Gazprom Vniigaz»

doi:10.25018/0236-1493-2020-4-0-44-57

Cited by 4 publications

(3 citation statements)

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“…As a result, there are very few regional works in this direction. The recent work [3] involving similar studies of the Daginskaya Formation may confirm this state of the art. Actually, core material studied in [3] was too limited.…”

Section: Introductionmentioning

confidence: 59%

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Geomechanical parameters of sedimentary rocks of Southern Sakhalin

Kamenev

Богомолов

Усольцева

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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The samples of terrigenous rocks of the Sakhalin were selected for geomechanical studies: the rocks of the Nevelskaya and Kholmskaya Formations from the Petropavlovsk quarry; ones of the Kholmskaya Formation on the west coast of the south of Sakhalin, rocks of the Junonskaya Formation on the east coast. The Kholmskaya Formation N1hl is represented by siltstones and interlayers of fine-grained sandstone. The Nevelskaya Formation N1nv is represented by siltstones with inclusions of tufogenic material. The Junonskaya Formation T2-Jun is represented by variegated greyish-green jaspers. Their static and dynamic parameters (strength limits, static Young’s modulus and Poisson’s ratio, cohesion and angle of internal friction) were determined. The obtained results are characterized by a significant spread of values, which is likely explained by the significant fracturing of the initial samples and the effect of anisotropy.

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Section: Introductionmentioning

confidence: 59%

“…The recent work [3] involving similar studies of the Daginskaya Formation may confirm this state of the art. Actually, core material studied in [3] was too limited. In such situations, sampling rocks is done from outcrops located near the site of interest or from a locally outcropping stratigraphic unit.…”

Section: Introductionmentioning

confidence: 59%

Geomechanical parameters of sedimentary rocks of Southern Sakhalin

Kamenev

Богомолов

Усольцева

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…Researchers often neglect the fact that in the course of field development with the decrease in fluid pressure in the reservoir over time, the mechanical parameters of the reservoir rocks can also change [8,[29][30][31][32] and significantly affect the calculated (predicted) value of subsidence. For a more accurate prediction, when calculating subsidence, changes in the porosity coefficient (see Fig.…”

Section: Influence Of Change Of Petrophysical Parameters On Final Ass...mentioning

confidence: 99%

Assessment of ground surface subsidence during Chayanda field development with regard to changes in petrophysical parameters of oil and gas reservoirs

Kuzmin¹,

Kuzmin²,

Zhukov³

2022

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The geodynamic consequences of long-term mineral mining can involve both extensive ground surface subsidence in the mining area and local activations of fault zones. Estimates of the ground surface subsidence in Chayanda field of hydrocarbons in Eastern Siberia are considered. The nature of changes in the pore space of the Vendian-age Botuoba, Talakh and Khamakin reservoirs was studied by modeling the development of the field up to depletion at the increasing effective pressure from 37.0 to 50.0 MPa. It is revealed that the average value of the porosity coefficient will decrease from 8.976% to 8.916%, the compressibility of the pore space will decrease from 2.844 to 2.616 1/GPa by 0.228 1/GPa or by 8.0% relative to the beginning of development.Estimates of the possible subsidence values in the modeling of the field development process were made using Kuzmin's genetic model of a deformable reservoir. The parameters of the geomechanical model of productive gas-bearing layers were adopted in accordance with the geological and structural characteristics of the field. The maximum values of possible surface subsidence in the field development modeling are estimated as 33.0 cm and 33.5 cm at the decrease in the reservoir pressure by 5 MPa with and without regard to the dynamics of petrophysical parameters, respectively. When the reservoir pressure decreases by 13 MPa, the maximum subsidence is estimated as 78.0 cm and 83.0 cm with and without regard to the dynamics of petrophysical parameters.The studies have shown that taking into account the dynamics of petrophysical characteristics of reservoirs during long-term development of hydrocarbon deposits significantly diminishes the values of ground surface subsidence above the field and reduces the level of geodynamic risk of oil and gas facilities.

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Evaluating the Impact of the Development of the Chayanda Field on Surface Ground Subsidence

Zhukov,

Kuzmin

2023

Izv. Atmos. Ocean. Phys.

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Estimating the strength and elasticity of rocks in the Dagi formation on the Sakhalin shelf

Cited by 4 publications

References 0 publications

Geomechanical parameters of sedimentary rocks of Southern Sakhalin

Geomechanical parameters of sedimentary rocks of Southern Sakhalin

Assessment of ground surface subsidence during Chayanda field development with regard to changes in petrophysical parameters of oil and gas reservoirs

Evaluating the Impact of the Development of the Chayanda Field on Surface Ground Subsidence

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