Complexing information about different heterogeneity in the geological modeling of oil and gas deposits

UDK: 519.868:55

DOI: 10.24887/0028-2448-2020-7-82-87

Key words: inhomogeneity, reservoir, oil, gas, reservoir, productive deposits, modeling, stochastic and statistical methods

Authors: P.N. Strakhov (IGIRGI JSC, RF, Moscow), E.A. Davydova (Rosneft Oil Company, RF, Moscow), K.G. Skachek (IGIRGI JSC, RF, Moscow), Yu.G. Eremin (IGIRGI JSC, RF, Moscow)

The article presents the results of the research conducted by Rosneft Oil Company on the study of the problems of combining heterogeneous heterogeneity of oil and gas deposits, which largely determines the reliability of geological and hydrodynamic three-dimensional digital models of hydrocarbon deposits. The article is devoted to the problem of combining the results of various studies in constructing a geological model of an oil and gas deposit. Five methods of accounting for data obtained in a detailed study of smaller objects are considered. The first method involves averaging and/or coarsening of the data obtained as a result of studies of smaller objects. The second method involves the integration of multidimensional studies based on the identification and generalization of functional heterogeneity (significant functional disturbances or deviations from the revealed dependencies, trends, distributions, etc.). Its application allows in some cases to identify structural features of target objects. The third method is based on the need to take into account the general laws of development of the processes of formation of productive deposits during the integration of multi-scale studies. In this case, the general laws of development of the processes of formation of productive deposits, determined on the basis of detailed studies of smaller geological bodies, are taken into account. The fourth method is based on the use of stochastic and statistical methods. It allows you to quite successfully partially fill in the missing information on detailed studies of smaller bodies. The fifth method involves the implementation of auxiliary modeling. When studying a larger geological body, not the data of detailed studies of smaller objects are used, but the corresponding models, reduced to the corresponding scale. References 1. Strakhov P.N., Koloskov V.N., Bogdanov O.A., Sapozhnikov A.B., Issledovanie neodnorodnostey neftegazonosnykh otlozheniy (Investigation of heterogeneity of oil and gas deposits), Moscow: Publ. of Gubkin University, 2018, 189 p. 2. Dulkarnaev M.R., Skachek K.G., Belyakov E.O., Takkand G.V., New method of modelling filtration-characteristics granular reservoir rocks (on example Povhovskoe field) (In Russ.), Geoinformatika, 2011, no. 3, pp. 47–50. 3. Slavkin V.S., Strakhov P.N., Frenkel' S.M., Possibility of determining the permeability of pore-type reservoirs according to well log data (In Russ.), Geologiya, geofizika i razrabotka neftyanykh mestorozhdeniy, 1997, no. 2, pp. 17–21. 4. Levorsen A.I., Geology of petroleum, The AAPG Foundation, 2001, 724 p. 5. Bogdanov O.A., Strakhov P.N., Assessment of the filtration properties of terrigenous sediments of the Cenomanian stage of the northern part of Western Siberia during the construction of geological models of hydrocarbon deposits (In Russ.), Nauka i tekhnika v gazovoy promyshlennosti, 2017, no. 1, pp. 3–8. 6. Khanin A.A., Porody-kollektory nefti i gaza neftegazonosnykh provintsiy SSSR (Reservoir rocks of oil and gas of the USSR petroliferous provinces), Moscow: Nedra Publ., 1969, 368 p.