On the example of the sedimentary section of the contact of the Paleozoic and Jurassic zone of Urmano-Archinskaya area the importance of lithogenetic step process identification is discussed for the forecast of high potential zone and of oil and gas prospects in general. Pre-Jurassicsedimentary interval of Archinskoye and Urmanskoe fields contains the supergene altered Paleozoic limestones altered by weathering and overlying redeposited laterites. The rocks have a complex composition; they are ambiguous in the genetic interpretation and prediction of reservoir properties. However, a wide range of oil and gas exploration and production problems - from hydrocarbon sources to forecast the quality of reservoirs, their irregularities and localization of traps is associated with this interval of the sedimentary section. On the basis of geological, geophysical data and detailed lithological characteristics the problems concerned to the lithogenesis of contact Paleozoic - Mesozoic zone as the basis of the forecast distribution and variability properties of the productive horizon are discussed.
References
1. Koveshnikov A.E., Nedolivko N.M., Weathering rocks of Pre-Jurassic rocks of Western Siberian geosyneclise (In Russ.), Izvestiya Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk Polytechnic University, 2012, V. 320, no. 1, pp. 77-81.
2. Koveshnikov A.E., Nedolivko N.M., Secondary catagenetic transformations
of of Pre-Jurassic rocks of Western Siberian geosyneclise (In Russ.), Izvestiya
Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk Polytechnic University, 2012, V. 320, no. 1, pp.. 82-86.
3. Ezhova A.V., Aluminous and ferriferous rocks of the productive strata in the South-East of Western Siberian oil-and-gas province (Tomsk region) (In Russ.), Izvestiya Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk Polytechnic University, 2012, V. 321, no. 1, pp. 111-121.
4. Kuzina M.A., Korzhov Yu.V., I saev V.I., Geochemical and lithological justification of «The Main Source» concept of Pre-Jurassic oil deposits in Krasnoleninsk arch (Tyumen region) (In Russ.), Izvestiya Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk Polytechnic University, 2014, V. 324, no. 1, pp. 32 – 38.
5. Shibistov B.V., Zakonomernosti formirovaniya i razmeshcheniya kontinental'nykh boksitov (Regularities of formation and distribution of continental bauxite): thesis of doctor of technical science, Tomsk, 2002.
6. Butorina M.A., Glavnova E.N., Dmitruk D.N. et al., Geological and reserve
development peculiarities of Archinskoye field (In Russ.), Neftyanoe
khozyaystvo = Oil Industry, 2014, no. 2, pp. 109-113.
7. Yudovich Ya.E., Ketris M.P., Geokhimicheskie i mineralogicheskie indikatory vulkanogennykh produktov v osadochnykh tolshchakh (Geochemical and mineralogical indicators of volcanogenic products in sedimentary sequences), Ekaterinburg: Publ. of UB RAS, 2009, 412 p.
8. Zapivalov N.P., Isaev G.D., Criteria of estimation of oil-and-gas-bearing
Palaeozoic deposits of Western Siberia (In Russ.), Vestnik Tomskogo gosudarstvennogo universiteta, 2010, V. 341, pp. 226-232.
9. Kurbala E.L., Oil and gas reservoirs in the carbonate weathering crust
(In Russ.) Geologiya nefti i gaza = The journal Oil and Gas Geology, 1990,
no. 1, pp. 29 - 32.
10. Samoylov A.G., Kopylov A.V., Lomaev V.G., Siberian bauxites and potentialities of their use for alumina production (In Russ.), Mineral'nye resursy Rossii. Ekonomika i upravlenie, 2006, no. 6, pp. 8-12.
11. Isaev G.D., Stratification and structure of rocks of the Mesozoic-Palaeozoic contact zone (In Russ.), Vestnik Tomskogo gosudarstvennogo universiteta, 2010, V. 331, pp. 203-209.
12. Bazhenov V.A., Babanskaya I.V., Bauxites of Paleozoic basement of the
West Siberian platform(In Russ.), Geologiya i geofizika = Russian Geology and Geophysics, 1991, no. 1, pp. 101-107.
13. Frolov V.T., Lithology. Part 1, Moscow: Publ. of MSU, 1992, 336 p.
14. Yudovich Ya.E., Reflections on infiltration epigenesis (In Russ.), Izvestiya
Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk Polytechnic University, 2008, V. 312, no. 1, pp. 4-10.
