Moscow, Russian Federation
VAK Russia 1.6.4
VAK Russia 1.6.10
VAK Russia 1.6.11
VAK Russia 1.2.2
VAK Russia 1.1.8
VAK Russia 1.6
UDC 531.731.43
UDC 539.217
UDC 539.217.1
UDC 552.08
UDC 552.12
UDC 552.2
UDC 552.5
UDC 55
UDC 550.34
UDC 550.383
CSCSTI 37.31
CSCSTI 37.01
CSCSTI 37.15
CSCSTI 37.25
CSCSTI 38.01
CSCSTI 36.00
CSCSTI 37.00
CSCSTI 38.00
CSCSTI 39.00
CSCSTI 52.00
Russian Classification of Professions by Education 05.06.01
Russian Library and Bibliographic Classification 263
Russian Library and Bibliographic Classification 260
Russian Library and Bibliographic Classification 26
Russian Trade and Bibliographic Classification 6332
Russian Trade and Bibliographic Classification 6335
Russian Trade and Bibliographic Classification 6338
Russian Trade and Bibliographic Classification 6339
Russian Trade and Bibliographic Classification 63
BISAC JNF037060 Science & Nature / Earth Sciences / Rocks & Minerals
BISAC NAT030000 Rocks & Minerals
BISAC SCI SCIENCE
The paper presents the results of non-destructive studies and digital analysis of the internal structure of reservoir rocks of the northern shelf gas condensate field. The study was carried out on the basis of X-ray microtomography methods using the Procon CT-MINI device of the Institute for Problems in Mechanics of the Russian Academy of Sciences. The results were obtained as part of a new cycle of ongoing research on Arctic deposits. Three-phase 3D models were constructed based on the obtained tomography data, on the basis of which digital twins of the reservoir were created. Quantitative porometric and granulometric analysis as well as spatial visualization of heterogeneity distribution were performed. It was determined that the studied gas reservoir is a weakly cemented sandstone with high porosity and well-connected capillary pore space. The main volume of pores is represented by open channels, pore distribution provides stable capillary filtration mode. The distribution of matrix grains is close to normal and is characterized by good sorting. The pore-to-grain size ratio of about 1 : 2 is typical for well-compacted and filtering sandstones. Metal inclusions are uniformly distributed, spatially isolated and do not affect the global filtration capacity. The identified parameters of porosity, pore and grain distribution provide a reliable basis for evaluating reservoir resistance to hydraulic fracturing, acid stimulation and other stimulation methods. It is shown that the rocks can be used as a storage medium for underground storage of gas and CO2 due to high open porosity, uniform distribution of channels and absence of pronounced caverns, which will contribute to a stable cyclic injection and withdrawal regime. Taking into account isolated and dead-end pores allows refining residual saturation calculations in fluid displacement modeling. The digital analysis technique is of particular relevance for the Arctic shelf conditions due to the difficulties in mass core extraction and lower strength characteristics of the material. In these conditions digital microtomography becomes an indispensable tool of nondestructive diagnostics, allowing researchers to save valuable core material and expand the range of obtained data on the reservoir.
digital core analysis, X-ray tomography of rocks, porosity, capacitive properties of reservoirs, porometry, granulometry, pore space structure
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