939 ISSN 1028-334X, Doklady Earth Sciences, 2009, Vol. 427A, No. 6, pp. 939–942. © Pleiades Publishing, Ltd., 2009. Original Russian Text © M.T. Abasov, Z.Ya. Abbasov, V.M. Fataliev, N.N. Hamidov, G.G. Mammadova, 2009, published in Doklady Akademii Nauk, 2009, Vol. 427, No. 6, pp. 802–805. It is known that phase transformations and con- nected processes deﬁne the component output of a con- densate pool to a great degree. Amongst the numerous factors inﬂuencing this process, the presence of porous media becomes of greater importance under certain conditions. To put it another way, the important things are an assessment of the porosity inﬂuence on the amount of the extracting condensate pools, determina- tion of the developmental and operational strategy, and the option of a method to inﬂuence the pool. Investigations on the inﬂuence of porous media on the parameters of the process of differential condensa- tion, in particular, on the amount of the extracted con- densate, were carried out in the past by leading special- ists in the Soviet Union and outside [1–7, 9, 10, etc.]. Most of them concluded that the inﬂuence of porous media on the parameters of the differential condensa- tion process is within experimental error, and thus, the results obtained in a PVT bomb without porous media are suitable for using in the development of the conden- sate pool. A serious inﬂuence of the presence of porous media on the parameters of condensate pool development was pointed out recently [1, 2, 4, 6]. The new results show how the forming condensate micronuclei inﬂuence the adsorption and desorption processes in porous media. It was shown for the ﬁrst time in [3] with the formation of condensate micronuclei at the initial stage of conden- sate pool development. It is obvious that processes taking place in porous media among the surface of rocks, its constituent grains, and the ﬂuid condensate (in different forms) are the main factors having an inﬂuence on the amount of extracted ﬂuid hydrocarbons and on some other param- eters of condensate pool development. In the present paper, the process of differential con- densation of a gas-condensate system with the presence and absence of porous media is considered; how the surface of rocks and the constituent grains inﬂuence the amount of extracted condensate and change the physi- cal–chemical and thermodynamic properties of ﬂuids is studied as well. Special experiments were carried out, both with the presence of porous media and without it. The necessary number of experiments was deﬁned using the rational planning method [6], with ﬁve values for each factor: porosity, amount of water left, condensate, and layer temperature. In the end, 25 experiments were sufﬁcient. On the basis of analysis of the results, the inﬂuence of porous media on the amount of extracted condensate and gas and on the change in their hydrocarbon compo- sition as well was determined. In Table 1, we provide the data on one of 25 experi- ments conducted with porous media and a PVT bomb, where the porosity was 0.24, the amount of water left was 20%, the condensate density was 737.9 kg/m 3 , and the layer temperature was 110°C. As is seen in Table 1, at the initial stage of the dif- ferential condensation process, i.e., with a pressure decrease from 30 to 24 MPa, the difference in the amount of extracted condensate in the PVT-bomb and porous media is 31.2%; with a pressure decrease from 18 to 6 MPa, this difference is 16.7%. This evidences that condensate release from the system begins as pres- Phase Transformations in Condensate Pool Development Corresponding Member of the RAS M. T. Abasov, Z. Ya. Abbasov, V. M. Fataliev, N. N. Hamidov, and G. G. Mammadova Received March 24, 2009 Abstract—The phase behavior of a gas-condensate mixture in the pool depletion process and the inﬂuence of porosity on the amount of extracted concentrate and gas and on the gas phase composition have been studied experimentally. A possible approach to the differential condensation process has been determined. The substan- tial inﬂuence of the zone of condensate micronuclei formation in a porous medium on the parameters of phase condensation and on the technological parameters of condensate pool development have been established for the ﬁrst time. DOI: 10.1134/S1028334X09060117 Geology Institute of the Azerbaijan National Academy of Sciences, Baku, Azerbaijan GEOLOGY