Overall evaluation of recovery ratio at high water cut of water-drive reservoir

Over nearly 30 years of exploitation , Jin-16 block, the main totally water flooding fault block reservoir in Liaohe oilfield, now has been situated in development-decreasing condition characterized by high water cut and high recovery percent of reserves, approaching a water flooding depletion-type reservoir with only 0.

Similarity theory of recovery percent and water cut in water flooding reservoir;

On the basis of obtaining solution of mathematical model,and taking into account the influence of wellbore storage and skin effect and the strength of water-drive,the paper calculated typical curves of pressure and pressure derivative for oil well in water-drive oil reservoir,analyzed the characteristic of pressure behavior,these works provided theory basis for well test.