Graphical method for determining the parameters of the skin zone based on transient temperature and pressure data in RN-VEGA

Akhmetova O.V. ov_akhmetova@bnipi.rosneft.ru RN-BashNIPIneft LLC Ufa
Urazov R.R. Ufa University of Science and Technology Ufa
Davletbaev A.Ya. Bashneft-Dobycha LLC Ufa
Mardamshin R.R. NK Rosneft PJSC Moscow
Sarapulova V.V.
Gimaev A.F.
Zyljova S.A.
YakupovR.F.
Pestrikov A.V.
DOI: 10.24412/2076-6785-2023-3-74-79

Abstract
The article describes an algorithm for determining the mobility and radius of the skin zone based on semi-log and log-log analyses of diagnostic plots of pressure and temperature transient data. The use in the analysis both of the plots of temperature change and its derivative distinguishes the work joint graphical analysis of diagnostic plots presented from other methods. To verify the method, we used temperature synthetic data in the reservoir generated by the RN-VEGA.

Materials and methods
We have presented a comparison of applying various graphic methods. It showed that producing reservoir and fluid properties in the skin zone and in the remote reservoir zone can be estimated using both transient temperature and pressure data dynamics. Analysis of two diagnostic temperature plots improves the result.
The models describing the pressure behavior in a radial composite reservoir, built taking into consideration the diagnostics results, showed good convergence with field data.

Keywords
radial composite reservoir, Thermal dynamic well test, skin-factor, graphical analysis, diagnostic plot
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