Calculation of PVT-properties of reservoir fluids by modified correlations based on the results of laboratory studies of samples of oil, oil and gas and oil and gas condensate deposits in the territory of activity of «RN-Purneftegaz» LLC

Ishmuratov T.A. ishmuratovta@bnipi.rosneft.ru “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Islamov R.R. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Sharipova G.F. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Abdulmyanov A.R. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Khamidullina A.I. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Khisamov A.A. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Andreev A.E. “RN-Purneftegaz” LLC Gubkinskiy
Opritov I.G. “RN-Purneftegaz” LLC Gubkinskiy
DOI: 10.24412/2076-6785-2024-2-42-48

Abstract
The paper shows that the correlations used in calculating reserves or forecasting oil and gas production volumes can be modified based on laboratory samples, which increases the accuracy of their PVT properties. This made it possible to identify “problematic” objects in which the gas content values were underestimated or the volume coefficients were overestimated, as well as to exclude from the selection program layers whose PVT properties coincided with the values determined by modified correlations.

Materials and methods
Materials: results of laboratory examination of deep samples.
Methods: calculation of PVT properties of the formation by author’s correlations, estimation of the average deviation of experimental data from calculated PVT properties of formations, optimization of correlation parameters by the Newton method based on laboratory sample data.

Keywords
PVT-properties, correlation, modified correlation, oil and gas, correlation applicability matrix
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