Improvement of approaches for calculating the PVT properties of reservoir fluids of oil and gas, oil-gas-condensate and gas-condensate deposits on the territory of the activity of RN-Purneftegas LLC

UDK: 622.
DOI: 10.24887/0028-2448-2021-12-92-96
Key words: PVT-properties, correlation dependencies, oil and gas, field, properties of oil and gas
Authors: T.A. Ishmuratov (RN-BashNIPIneft LLC, RF, Ufa), A.I. Khamidullina (RN-BashNIPIneft LLC, RF, Ufa), R.R. Islamov (RN-BashNIPIneft LLC, RF, Ufa), A.A. Khisamov (RN-BashNIPIneft LLC, RF, Ufa), A.R. Abdulmyanov (RN-BashNIPIneft LLC, RF, Ufa), A.A. Senina (RN-BashNIPIneft LLC, RF, Ufa), A.E. Andreev (RN-Purneftegas LLC, RF, Gubkinsky), I.G. Opritov (RN-Purneftegas LLC, RF, Gubkinsky), A.F. Abdullin (RN-Purneftegas LLC, RF, Gubkinsky), A.M. Logashin (RN-Purneftegas LLC, RF, Gubkinsky)

The paper considers the known correlations and conditions of their applicability for calculating the PVT properties of reservoir oil, gas and water for fields located on the territory of the activities of RN-Purneftegas LLC. For correlations that meet the conditions of applicability for the deposits of RN-Purneftegaz LLC, the results of laboratory determination of PVT properties were compared with the results of calculation by correlations. Correlations have been determined for strata or groups of strata of each deposit, which give minimal mismatch with laboratory data when calculating PVT properties. A matrix of applicability of various correlations has been developed, in which correlations are given for each PVT property for deposits or groups of deposits of each deposit, allowing the most accurate determination of PVT properties. Correlations were found to determine the gas content, volume coefficient, compressibility, viscosity of oil at given values of pressure, temperature, saturation pressure, relative density of oil in water and relative density of gas in air. Correlations are selected to determine the z-factor and the viscosity of the gas for a given pressure, temperature and relative density of the gas through the air. Correlations are selected to determine the solubility of gas, density, compressibility and viscosity of water depending on pressure, temperature and mineralization. Based on the obtained results, an audit and correction of the album of PVT properties was carried out. Corrected PVT properties of reservoir fluids will be used in forming of technological regime of wells, in planning of dissolved gas production, well tests interpretation and in reservoir development projecting. 


1. Khabibullin R.A., Khasanov M.M., Brusilovskiy A.I. et al., New approach to PVT correlation selection (In Russ.), SPE-171241-RU, 2014, DOI:10.2118/171241-MS

2. KhabibullinR.A., KhasanovM.M., Odegov A.I. et al., Analysis of Black Oil correlations for PVT properties estimation (In Russ.), SPE-176596-RU, 2015, DOI:10.2118/176596-RU

3. McCain W.D., Spivey J.P., Lenn C.P., Petroleum reservoir property correlations, Tulsa: PennWell, 2011, 219 p.

4. Larry W.L., Petroleum engineering handbook, 2006, 864 p.

5. Al-Marhoun M.A., Evaluation of empirically derived PVT properties for Middle East crude oils, Journal of Petroleum Science and Engineering, 2004, V. 42, pp. 209–221.

6. Dindoruk B., Christman P.G., PVT properties and viscosity correlations for Gulf of Mexico oils, SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 2001.

7. Ghetto G., Paone F., Villa M., Reliability analysis on PVT correlation, SPE-28904-MS, 1994, DOI: 10.2118/28904-ms

8. Lee S.T., Chien M.C.H., A new multicomponent surface tension correlation based on scaling theory, SPE-12643-MS, 1984, , DOI: 10.2118/12643-MS

9. Yarborough L., Hall K.R., How to solve equations of state for z-factors, Oil and Gas J., 1974, no. 18, pp. 86–88.

10. Sutton R.P., Fundamental PVT calculations for associated and gas/condensate natural gas systems, SPE-97099-PA, 2005, DOI:10.2118/97099-PA

11. STO 51.00.021-84. Raschet sostava i svoystv nefti, gaza i vody neftyanykh mestorozhdeniy Glavtyumenneftegaza (Calculation of the composition and properties of oil, gas and water of oil fields of Glavtyumenneftegaz), 1985.

12. Al-Shammasi A.A., A review of bubblepoint pressure and oil formation volume factor correlations, SPE-71302-PA, 2001, DOI:10.2118/71302-PA

13. Dariy S.D., IslamovR.R., Khaydarshin R.R. et al., Methodical bases of differntiation of associated petroleum gas production to free gas and dissolved gas (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 5, pp. 86–90, DOI:10.24887/0028-2448-2019-5-86-90

14. Zor'kin L.M., Vody neftyanykh i gazovykh mestorozhdeniy SSSR (Waters of oil and gas fields of the USSR), Moscow: Nedra Publ., 1989, 382 p.

To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases