Research of slug combination flooding in complicated fault block of jidong oilfield and its field application

The high shallow southern district is a typical block of Jidong oilfield, which is one of the complicated fault block oil fields of edge and bottom water-drive. In view of the status of the low recovery ratio, chemical flooding technology research is developed. According to the reservoir characteristics, profile and plane of inhomogeneous models are established respectively, 7 kinds of water-drive Chemical flooding numerical simulation are developed and 5 better styles are chosen out , which are in the condition with Polymer flooding , imitating physical research of formation heterogeneity. The simulation results show that slug composition flooding effect is better than a single chemical flooding and which is made of cross-linked polymer and activity polymer flooding enhances the recovery ratio to be the biggest eventually (more than 17%). Two injection wells are chosen to do field tests and experiment research, the recovery ratio of the corresponding oil well increases 14% , and good effect are achieved.