SECONDARY PROFILE CONTROL BY COMBINATION FLOODING IN BLOCK LIU 62,DA WANG ZHUANG FIELD

There are many problems in Block Liu 62,such as deep burying depth,high temperature in stratum,severe inconsistency in or among layers and planes,rate of water cut increases quickly after many small dosages-profile control and one big dosage-combination flooding,so oil production effect was becoming inefficient.SDC,TC-938 as nature commixture carboxylate were optimized in the secondary whole combination flooding.After the flooding,the oil recovery was enhanced,water cut was going down,and better stimulation effect was obtained.