Measuring of rocks residual water saturation by laboratory methods
Petrophysic laboratory methods were developed several decades ago. Up-to-date micro-level investigations have shown that methods of rocks residual water saturation measuring are first not enough theoretically founded, secondly in need of advances for accuracy enhancement. In this article a new samples centrifugation method is proposed for residual water saturation measuring. The method is founded on changing of sample position relative to centrifugal force direction during centrifugation. This allows to displace free water out of complicated configuration pores and as a result to raise residual water saturation measuring accuracy significantly.