Calculation of permeability and productivity coefficients as well as skin-factor using formula of indicator lines obtained in laboratory conditions
UDC: 622.323
DOI: 10.33285/0130-3872-2023-6(366)-68-72
Authors:
LEONOV EVGENIY G.
1,
UBUSHAEV UBUSH B.1,
KOSTYUCHENKO ANDREY N.1
1 National University of Oil and Gas "Gubkin University", Moscow, Russia
Keywords: reservoir penetration quality assessment, filtration, indicator line, permeability factor, skin-factor, productivity factor
Annotation:
The article considers the assessment of the impact on the near-wellbore zone of the reservoir, based on the indicator curves. The relevance of the article is caused by the increased requirements for the quality of the opening and ensuring the potential productivity of the reservoir. New formulas for calculating the productivity factor in case of a non-linear filtration law are derived as well as formulas for calculating the generalized value of the skin factor in case of linear and non-linear filtration, based on the integral coefficients of indicator lines. It is shown that when calculating the skin-factor using the generalized formulas represented by the coefficients of the indicator curves, it is not necessary to determine their components (radius of the feed contour, fluid viscosity, reservoir effective thickness, etc.), which are often taken with an unknown error when calculating the permeability coefficients according to the generally accepted formula. The resulting linear formulas have been successfully applied to process five series of measurements of indicator lines on a filtration laboratory unit. The considered approach to the use of indicator lines can also be used in the field conditions.
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