Отправлено: 25.06.07 01:03. Заголовок: Расчет эффективной пористости для смеси песок-глина

A New Rock Physics Model for Sand-Clay
Structures with Effective Porosity
B. Gurevich (Curtin University and CSIRO Petroleum Perth) & R. Ciz* (Freie Universitaet Berlin)
SUMMARY
The distribution and amount of clay content within the sandstone has a great impact on seismic velocities.
This knowledge of clay content is also important for reservoir characterization and interpretation of
properties from well logs and seismic data. Reliable rock physics models implementing porosity, clay
content and fluid saturation are required for the inversion algorithms. Simultaneous inversion of porosity,
clay content and saturation is formally non-unique from P- and S-velocities. This difficulty can be partially
resolved for certain lithologies by the newly developed rock physics models for dispersed and laminar clay
distributions. These models implement effective porosity principles and assume constant porosity of
sandstone matrix and porous clay. Porosities and clay contents are related in these models and hence the
number of unknowns for the inversion reduces from three to two.

Расчет эффективной пористости для смеси песок-глина авторы проводят по обычной модели вложения (забыв, что существуют еще и алевритовая и алевролитовая фракции)
А ведь вроде не первый раз замужем (как говаривала моя бывшая сотрудница!)
Впрочем, само слово НОВАЯ МОДЕЛЬ неплохо маркирует глубину помыслов и рефлексии авторов