Results of its appli-cation in typical reservoirs showed that economic limit water cut is 92%for the lst-classresetvoirs, and 90%for the 2nd-and 3rd-class reservoirs.

• 选择了部分典型层块进行测算，确定一类油藏的经济极限含水率为92%25，二、三类油藏经济极限含水率为90%25。