Status and problems of the of pre-Jurassic basement petrophysical study by the example of Shaim region in Western Siberia

Authors: R.A. Rezvanov (Oil and Gas Research Institute of RAS, RF, Moscow), O.A. Smirnov (Pangaea Inc., RF, Moscow)

Key words: pre-Jurassic complex, study of the core, the description of thin sections, shales, reservoir, reservoir properties.

The descriptions of core samples and Paleozoic rocks thin sections of the four wells , the results of quantitative determinations of permeability indexes, porosity, water saturation, density and electrical resistivity , as well as relations between pairs of the most important characteristics are analyzed, factors that impede the use of well survey data for selection and evaluation of the reservoirs are identified. It is pointed to the lack of the experimental data on a number of characteristics of rocks that are important from the point of view of the evaluation of the effectiveness of the well survey methods and the development of the interpretation of their results applied to the study of the pre-Jurassic part of section. Weak relation between permeability and porosity index eliminates the possibility of reservoirs selection by the boundary value of the porosity index. It is necessary to create conditions for the manifestation of reservoirs direct signs (filter cake, radial resistance gradient) with verification by testing at least in the first wells.
References
1. Zubkov M.Yu., Shelepov V.V., Pecherkin M.F. Vasil'ev V.E., Proceedings of
2nd scientific and technical conference “Puti realizatsii neftegazovogo potentsiala
Khanty-Mansiyskogo avtonomnogo okruga” (Ways to implement
the oil and gas potential of the Khanty-Mansiysk Autonomous Okrug), 1999,
V. 2, pp. 173-186.
2. Zalevskiy O.A., Valeev G.Z, Tsvetkova I.V., 11th scientific and practical conference “ Puti realizatsii neftegazovogo potentsiala Khanty-Mansiyskogo
avtonomnogo okruga” (Ways to implement the oil and gas potential of the
Khanty-Mansiysk Autonomous Okrug), 2008, V. 2, pp. 109-114
3. Mosunov A.Yu., Efimov V.A., Proceedings of 8th scientific and practical
conference “ Puti realizatsii neftegazovogo potentsiala Khanty-Mansiyskogo
avtonomnogo okruga” (Ways to implement the oil and gas potential of the
Khanty-Mansiysk Autonomous Okrug), 2005, V. 2, pp. 219-226.

Key words: pre-Jurassic complex, study of the core, the description of thin sections, shales, reservoir, reservoir properties.

The descriptions of core samples and Paleozoic rocks thin sections of the four wells , the results of quantitative determinations of permeability indexes, porosity, water saturation, density and electrical resistivity , as well as relations between pairs of the most important characteristics are analyzed, factors that impede the use of well survey data for selection and evaluation of the reservoirs are identified. It is pointed to the lack of the experimental data on a number of characteristics of rocks that are important from the point of view of the evaluation of the effectiveness of the well survey methods and the development of the interpretation of their results applied to the study of the pre-Jurassic part of section. Weak relation between permeability and porosity index eliminates the possibility of reservoirs selection by the boundary value of the porosity index. It is necessary to create conditions for the manifestation of reservoirs direct signs (filter cake, radial resistance gradient) with verification by testing at least in the first wells.
References
1. Zubkov M.Yu., Shelepov V.V., Pecherkin M.F. Vasil'ev V.E., Proceedings of
2nd scientific and technical conference “Puti realizatsii neftegazovogo potentsiala
Khanty-Mansiyskogo avtonomnogo okruga” (Ways to implement
the oil and gas potential of the Khanty-Mansiysk Autonomous Okrug), 1999,
V. 2, pp. 173-186.
2. Zalevskiy O.A., Valeev G.Z, Tsvetkova I.V., 11th scientific and practical conference “ Puti realizatsii neftegazovogo potentsiala Khanty-Mansiyskogo
avtonomnogo okruga” (Ways to implement the oil and gas potential of the
Khanty-Mansiysk Autonomous Okrug), 2008, V. 2, pp. 109-114
3. Mosunov A.Yu., Efimov V.A., Proceedings of 8th scientific and practical
conference “ Puti realizatsii neftegazovogo potentsiala Khanty-Mansiyskogo
avtonomnogo okruga” (Ways to implement the oil and gas potential of the
Khanty-Mansiysk Autonomous Okrug), 2005, V. 2, pp. 219-226.


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