The results of laboratory studies of nearly 1,300 samples from 50 wells of reservoirs of three productive terrigenous horizons represented by sandstones and siltstones are considered. Intergranular and fractured components mainly make up the porosity structure of reservoirs and their values influence the main parameters of rocks, including filtration-capacitive properties of reservoirs, and determine the processes of hydrocarbon field development. The spatial distribution of the intergranular and fractured components of reservoir porosity affects the development and exploitation of oil and gas reservoirs and determines the relevance of this study. The values of the fracture and intergranular component of porosity were determined by the author’s method using data on open porosity and the rate of elastic wave propagation in rock samples and the mineral skeleton of these samples during the simulation of reservoir conditions.
A mosaic area distribution of fractured porosity values, caused by a long geological and tectonic history of the area development, was revealed. We identified zones of increased fractured porosity up to 0.7–0.8 % (percent absolute porosity) in the north and center of the western part of the field, and zones with minimum fractured porosity values of less than 0.2–0.3 % in the eastern part of the field. Results of laboratory core studies showed the presence of fractured porosity in reservoirs up to 1.26 %. The data on the size and distribution of fractured reservoirs across the Chayanda field area may be used to refine the field development project.
Rock, fractured porosity, intergranular porosity, longitudinal wave velocity, core, well, area distribution
- Bagrintseva, K.I. (1982). Cracking of sedimentary rocks. Moscow: Nedra, 256 с. (In Russ.)
- Bagrintseva K.I., Chilingar G.V. (2007). The role of fractures in the development of complex reservoir types and fluid seepage in natural reservoirs. Geologiya nefti i gaza = Russian Oil and Gas Geology, 5, pp. 28-37. (In Russ.)
- Boyarchuk A.F., Shnurman G.A., Bagov L.S. (1991). Method for Determination of Fractured Porosity of Rocks. Patent of the Russian Federation No. 2012021. Patent holder: Boyarchuk A.F. (In Russ.)
- Gmid L.P., Belonovskaya L.G., Shibina T.D., Oknova N.S., Ivanovskaya A.V. (2009). Methodological guide for lithologic-petrographic and petrochemical study of sedimentary reservoir rocks. Ed. A.M. Zharkov. St.Petersburg: VNIGRI, 160 с. (In Russ.)
- Kryuchkov V.E., Medvedev A.G., Izvekov I.B. (2012). Lithological-facial and geodynamic conditions of formation of Vendian deposits of the Chayanda field. Vesti gazovoy nauki, 1(9). pp. 202-207. (In Russ.)
- Kryuchkov V.E., Penzin A.A. (2016). Prospects for increasing the explored hydrocarbon reserves of the Chayanda oil and gas condensate field. Vesti gazovoy nauki, 1(25), pp. 34-39. (In Russ.)
- Kreknin S.G., Pogretsky A.V., Krylov D.N., Trukhin V.Y., Sitdikov N.R. (2016). Modern geological and geophysical model of the Chayanda oil and gas condensate field. Geologiya nefti i gaza = Russian Oil and Gas Geology, 2, pp. 44-55. (In Russ.)
- Kuzmin Yu.O. (2002). Modern anomalous geodynamics of the bowels induced by small natural-technogenic impacts. Mining informational and analytical bulletin, 9, pp. 48-54. (In Russ.)
- Kuzmin, Yu.O. (2018). Recent Geodynamics of Tensile Faults. Izvestiya. Physics of the Solid Earth, 6, pp. 886-903. DOI: 10.1134/S000233371806008X
- Kuzmin, Yu.O. (2021). Deformation consequences of oil and gas field development. Izvestiya. Atmospheric and Oceanic Physics, 57(11), pp. 1479-1497. DOI: 10.1134/S0001433821110062
- Ryzhov A.E. (2013). Types and properties of terrigenous Vendian reservoirs of the Chayanda field. Vesti gazovoy nauki, 1(12), pp. 145-160. (In Russ.)
- Shchekin A.I., Vasiliev V.A., Nikolaychenko A.S., Kolomaitsev A.V. (2021). Prospective classification of fractured reservoirs of the crystalline basement. Georesursy = Georesources, 23(3), pp. 90-98. DOI: 10.18599/grs.2021.3.12
- Zhukov V.S. (2012). Assessment of reservoir fracturing by elastic wave propagation velocity. Vesti gazovoy nauki, 1(9), pp. 148-152. (In Russ.)
- Zhukov V.S. (2014). Method of determination of fractured porosity. Patent of the Russian Federation No. 2516392. Patent holder: Gazprom VNIIGAZ LLC.
- Zhukov, V.S. Kuzmin, Yu.O. (2020). The Influence of Fracturing of the Rocks and Model Materials on P-wave Propagation Velocity: Experimental Studies. Izvestiya. Physics of the Solid Earth, 56(4), pp. 470-480. DOI 10.31857/S0002333720040109
- Zhukov V.S., Kuzmin Yu.O., Poludin G.A. (2002). Evaluation of earth surface subsidence processes during development of gas fields (by the example of the North Stavropol field). Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy, 7, pp. 54-57. (In Russ.)
- Zhukov V.S., Lyugai D.V. (2016a). Determination of filtration-capacitative and elastic properties and electrical parameters of rock samples in the simulation of reservoir conditions. Moscow: Gazprom VNIIGAZ LLC, Gubkin Russian State University of Oil and Gas, 56 p. (In Russ.)
- Zhukov V.S., Motorygin V.V. (2016b). Influence of different types of porosity on filtration-capacitative properties of reservoirs (by the example of the Chayanda field). Vesti gazovoy nauki, 1(25), pp. 63-67. (In Russ.)
- Zhukov V.S., Motorygin V.V. (2017a). Analysis of some ways to assess fractured porosity. Vesti gazovoy nauki, 3(31), pp. 207-215. (In Russ.)
- Zhukov V.S., Motorygin V.V. (2017b). Crack hollowness of rocks: definition, assessment of the impact on filtration-capacitative properties. Proc. Int. Sci. and Pract. Conf.: New ideas in oil and gas geology - 2017. Ed. A.V. Stupakova. Moscow: Pen, pp. 107-111. (In Russ.)
- Zhukov V.S., Rassokhin S.G., Motorygin V.V. (2018). Cracks: their contribution to the total void space volume and its changes with the growth of effective pressure in the formation. Nauka i tekhnika v gazovoy promyshlennosti, 3(75), pp. 49-58. (In Russ.)
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Vitaly S. Zhukov – Dr. Sci. (Engineering), Senior Researcher, Associate Professor, Chief Researcher of the Laboratory 201, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Build. 1, 10, Bolshaya Gruzinskaya st., Moscow, 123242, Russian Federation
Vladimir V. Motorygin – Researcher, Laboratory of Petrophysics, Branch «Aprelevskoe Branch of VNIGNI», VNIGNI
1, 1st Ketritsa, Aprelevka, Moscow region, 143360, Russian Federation
Zhukov V.S., Motorygin V.V. (2022) Distribution of fractured reservoirs in the Chayanda field (Eastern Siberia). Georesursy = Georesources, 24(3), pp. 84–89. DOI: https://doi.org/10.18599/grs.2022.3.7