Discussion in calculating engineering quantity of drainage cast ironpipe and trap;

Based on experiment conducted by City University of Hongkong, a method was introduced to preserve trap water seals by supplying water from basin s drainage.

Correlative empirical equation of relative permeability of oil and water phase is introduced,and the empirical equations for plotting cumulative water storage rate,stage water consumption rate and cumulative water consumption rate is deduced.

According to the definitions of water storage rate and water drive index, combining the eater drive characteristic curve,this paper evaluated the waterflood effectiveness of H31 block using the standard curve of Water storage rate and water drive index and the curve between a ratio of total oil produced to OOIP and total water-cut, then the target of improving development effectiveness can be won.