测定储层饱和度指数的增水法

增水法是利用岩样自身的毛细管压力，让岩样自然吸水，分三个阶段由低含水饱和度向高含水饱和度过渡，从而获取储层岩样不同的饱和度指数。利用增水法测定了陕北油气田的低孔低渗砂岩储层饱和度指数，其结果可靠。

Incremental Water Method for Measuring Saturation Index of Reservior

An incremental water method is to make the core samples from reservoir absorb water naturally through capillary pressure in the samples themselves,and transform from lower to higher water saturation in three stages so as to get different saturation index of the samples.The method is used to obtain saturation index of sandstone reservoirs with low porosity and low permeability in Eerduosi Basin Oilfields.The results obtained are compared with that obtained with conventional methods Examples show that this method is also adaptable to cores from carbonate and other lithology reservoirs.