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LITHOLOGICAL FACTORS OF FORMATION OF THE VENDIAN TERRIGENIOUS RESERVOIRS IN THE SOUTHERN SIBERIAN PLATFORM

AUTHOR/S: I. VARAKSINA, E. KHABAROV, M. KROTOVA
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 1, 83-88 pp

ABSTRACT

The greatest reserves of hydrocarbons on the territory of the Siberian platform confine
to the Vendian terrigenous collectors. The paper is dedicated to the analysis of the
lithological factors, influenced the formation of these reservoirs. The void space of the
sandstones was examined on the basis of the detailed petrographic and electron
microscopic studies. The analysis of dependencies of the filtration-capacity properties
and the structural and material characteristics carried out.

Established that the sedimentary factors (the composition of the debris, the dimension
and degree of sorting of grains) set conditions for primary high porosity, but the
postsedimentary changes had played the ultimate role in the formation of the collector.
Compaction, regeneration of grains of quartz and anhydrite-dolomite cementation
worsened the reservoir properties. Heightened content of the feldspars and fragments of
clay rocks impeded the development of the quartz regeneration and, in conjunction with
the dissolution of the grains, provided the highest values of filtration-capacity
properties.

Keywords: Siberian platform, Vendian terrigenous reservoirs, postsedimentary changes, filtration-capacity properties

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