Отправлено: 29.06.07 03:36. Заголовок: Упругие свойства пород как функция их насыщенности

Упругие свойства пород как функция их насыщенности

A Saturation Law for Quantitative 4D Seismic
Analysis of a Turbidite Reservoir Undergoing
Waterflood C. MacBeth* (Heriot-Watt Institute of Petroleum Engineering) & K.D. Stephen (Heriot-Watt Institute of Petroleum Engineering)

SUMMARY
Reservoir management can be very much improved by increasing our knowledge of fluid changes within
the field. Time-lapse seismic can offer this information provided an accurate relationship between the
fluid-bulk modulus estimated from seismic and the true reservoir saturation condition is known. This
relationship is generally simplified by ignoring the interaction of fluid, heterogeneity and seismic at
various scales, thus significantly increasing errors and uncertainty in saturation estimates. To improve the
relationship, a reservoir-based saturation law is developed with specific application to a turbidite reservoir.
This geological architecture allows us to construct suitable conceptual models such that analytical
solutions can be derived. The resulting law takes into account both saturation and geological heterogeneity
when estimating saturation from seismic. Numerical tests based on flow simulation and seismic
calculation show that this law can accurately predict the true reservoir saturation to within 1 to 2 percent,
whilst laws not incorporating this reservoir information can achieve 3 to 8 percent and are strongly
dependent on porosity and saturation fluctuations. Whilst the new approach requires data gathered from
fine scale simulations and analogue outcrops, the improvement in accuracy and reduction in uncertainty
may well be advantageous.

В статье оцениваются упругие свойства пород в зависимости от степени их насыщения
Результаты зависят не только отнасыщения, но и от объемных долей и констант (видимо связанных с геометрией)
Имеется библиография в 8 наименований (в основном старые публикации - 3, публикации в Petroleum Geoscience и публикации MacBeth с соавторами - 3)