Abstract: Abstract：ThemajorityofLiaohesandstonereservoirshavethefeatureoffaultblocks，whichhavecomplexreservoircondition.
And that leads to many development problems in water flooding sandstone reservoirs and parts of the reservoirs are difficult
to develop after water-flooding adjustments. Based on the lab and in-situ data，this paper aims to analyze the degree and
factor regulation of major factors which affects the water flooding performance. After that，the key factors are optimized
from different aspects and the water-flooding development potential comprehensive evaluation system for Liaohe sandstone
reservoirs are established with meticulous study on water-flooding potential evaluation by Grey System Theory，which lays the
foundations for enhance oil recovery for Liaohe sandstone reservoirs.

Key words: Key words：sandstone reservoirs, water-flooding criteria, evaluation method, water-flooding potential