Clay rocks influence in the section of production formation on the liquid production decline rates in low permeability reservoirs

Kardopoltseva A.M. RN-BashNIPIneft LLC Ufa
Shtinov V.A. RN-BashNIPIneft LLC Ufa
Davletbaev A.Ya. RN-BashNIPIneft LLC, Ufa University of Science and Technology Ufa
Minibaev M.R. RN-BashNIPIneft LLC Ufa
Asalkhuzina G.F. RN-BashNIPIneft LLC Ufa
Trofimov V.E. RN-BashNIPIneft LLC Ufa
Shchutsky G.A. RN-Yuganskneftegas LLC Nefteyugansk
Miroshnichenko V.P. RN-Yuganskneftegas LLC Nefteyugansk
DOI: 10.24412/2076-6785-2023-1-56-60

Abstract
This article is devoted to the study of geomechanic and porosity clays properties influence on the processes of pressure redistribution and fluid filtration in the well drainage area, and as a result, on well productivity. Comparison of the calculation results showed a significant effect of clay interlayers in the reservoir section on the performance and productivity of the well.

Materials and methods
The study was carried out by creating synthetic hydrodynamic models with a different number of clay interlayers in the section of the productive formation, while maintaining the volume ratio between sandstone and clay in the ratio of 50:50. The Arps and Fetkovich methods were used to analyze decline curve anaysis production and calculate predicted values of cumulative production in the area of well drainage, assess and compare the rate of change in fluid production in wells.


Keywords
clay rocks, pore space compressibility, reservoir properties, reservoir modeling, decline curve analysis, Arps method, Fetkovich method
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