Отправлено: 01.07.14 01:15. Заголовок: Statistical Well Log Analysis of the Bazhenov Formation

Statistical Well Log Analysis of the Bazhenov Formation
Kulyapin P.S. and Sokolova T.F.
Jason, a CGG Company, Vyatka Business Centre, 35, Vyatskaya str., bld. 4, Moscow,
127015, Russia.

The statistical log analysis has been applied to study the multimineral composition and
porosity of the Bazhenov unconventional play. Effective and secondary porosities, as well as
net thicknesses, were evaluated using the well-log interpretation workflow designed at the
Well Logging Department of Gubkin Russian State University of Oil and Gas. The
advantages, limitations and drawbacks of the suggested approach are discussed and illustrated
with case studies for several fields located in the Krasnoleninsky and Surgut arches of the
West Siberian basin.
Secondary porosity (fractured/vuggy zones) has been analysed from shear wave splitting
effects. Additionally, the mechanical and elastic properties of the Bazhenov shale have been
analysed using well logs, in order to identify the most brittle rocks in the formation,
considered as the most favourable for fracking and completion.
Key words: Bazhenov formation, source rocks, shale play, unconventionals, TOC,
mineralogy, mineral volumes, well log analysis, petrophysics, statistical modelling, elastic
moduli, rock mechanics, brittleness.