Fataliyev V.M., Salimova S.A., Maharramova S.D.
Institute of Oil and Gaz, Azerbaijan National Academy of Sciences, Amirov F. Str., 9, Baku, Azerbaijan, AZ1000: email@example.com
Summary. As a result of the analysis of thermodynamic experiments as well as oil field data on production wells of Azerbaijan and Russia, three formation sources of the dispersed liquid hydrocarbons (DLH) in the reservoir condition were detected in the pressure range above the retrograde condensation. Those are: presence of heavy hydrocarbons that could not be transferred into the gas phase even at high pressures; liquid phase formed as a result of condensation at pressure above the retrograde condensation; and liquid phase dropped from the system due to early condensation because of surface forces. Two types of possible positions of DLH in reservoir conditions were determined. The liquid in the formation is closely linked to the surface of the rocks. This was caused by sufficiently high surface bonds as a result of adsorption of liquid molecule to the grain surface. The high content of heavy components contributes to the weakening the surface forces, that causes the liquid phase to be in a mobile state in the formation conditions. It has been noted that the factors above are important to take into account during projecting the rational methods of the exploitation of gas-condensate reservoirs.
Keywords: liquid phase, retrograde condensation, gas condensate fields, phase transformation, gas condensate system
Abasov M.T., Abbasov Z.Ya., Fataliyev V.M. et al. About phase transition during development of gas-condensate deposits. Doklady of RAS, V.6, №427, 2009, pp. 802-805 (in Russian).
Abbasov M.T., Abbasov Z.Ya., Fataliyev V.M., Hamidov N.N., Mammadova G.G. Applied issues of thermodynamics during oil and gas production. Nafta-Press. Baku, 2013, 212 p. (in Russian).
Abbasov M.T., Jevanshir R.D., Kondrushkin Yu.M. et al. Assessment demonstration of industrial reserves of oil and gas-condensate, analysis of current conditions and recommendations on increase of gas reserves estimation in marine fields of Caspian Sea. Azerbaijan Funds of Institute of Deep Oil and Gas fields, AS of Azerbaijan. Baku, 1994, 150 p. (in Russian)
Abbasov Z.Ya., Fataliyev V.M. About the physical nature of the retrograde condensation pressure of gas-condensate systems in the porous media condition. The reports of NAS of Azerbaijan, V. LXXI, №1, 2015, pp. 60-65.
Abbasov Z.Ya., Fataliyev V.M. Study of physics-thermodynamic processes in hydrocarbonic systems during pressure above retrograde condensation pressure. Proceedings of scientific session dedicated to 90th anniversary of academician Mitat Teimur ogly Abasov: Fundamental and applied problems of oil and gas fields development. Baku, 2016, pp. 135-186 (in Russian).
Fateyev D.G. Study of phase behavior of gas condensate fluid under conditions of abnormal high reservoir pressure. PhD thesis (Engineering Sciences). Tyumen, 2014, 132 p. (in Russian).
Feizullayev Kh.A., Aliyev I.N. Influence of hydrocarbon mixture composition on condensate recovery during development of bed by pressure depletion. SOCAR Proceedings, №3, 2014, pp. 71-76 (in Russian).
Gritsenko A.I., Nikolayev V.A., Ter-Sarkisov P.M. Extraction of components of stratum during development of gas-condensate deposits. Nedra. Moscow, 1995, 264 p. (in Russian).
Krasnova Ye.I. Study of influence of geologic-physical peculiarities in deposits upon extraction of components during development of raw hydrocarbons deposits. PhD thesis (Engineering Sciences).Tyumen, 2014, 121 p. (in Russian).
Mammadova G.G. Change patterns of physics-chemical and thermodynamic properties of fluids from gas-condensate deposits along fields of Azerbaijan. PhD thesis (Engineering Sciences). Baku, 2011, 139 p. (in Russian).
Sadykh-zade E.S., Razamat M.S., Yagubov M.S. Study of separation of oil and gas-condensate system of Bakhar field.“Oil and Gas studies”, Tyumen, 10, 1979, pp. 39-42 (in Russian).
Vasilyev V.V., Kovalenko A.P., Patrakov D.P. Exploitation peculiarities of volatile oil deposits with high gas factor of 1st May group of fields in the Middle Devonian. Oil industry, 11, 2010, pp. 58-61 (in Russian).