Study On The Swept Volume Of Polymer Flooding In Heterogeneous Reservoirs With High Permeability And Thick Oil Layers

Bohai SZ36-1 heavy oil reservoirs is characterized by high permeability,thick oil reservoir,well spacing and serious non-homogeneous,etc,swept volume was affected in the process of flooding,leading to the spend dgree of low-permeability layer was lOW?Under the guidance of new model for developing offshore oilfields and the limited of the offshore environment and characteristics of offshore development,however,what factors make recovery improve has not to be explored?Therefore,for improving the swept volume of offshore oilfields development and shorten the development cycle effectively,it requires further analysis of the main factors which affect the early injection.Polymer solution properties,injection method,reservoir heterogeneity and channeling are the main factors affecting the volume of polymer spreading,combined with SZ36-1 Bohai oilfield reservoir characteristics,do the study of hydrophobically associating polymers HAWP,LSRP and linear macromolecule polymer HPAM,examining their ability to establish flow resistance in the high permeability heavy oil reservoirs.The results show that there are significant differences in the ability to establish different properties of the polymer solution flow resistance;in this paper,heterogeneous reservoir simulations were desighed in the use of polymer systems with different flow characteristics,we come to the relationship between the parameters of the polymer solution and swept volume through comparing the change of recovery and the amount of liquid absorption of different layer.we design different flow resistance of flooding system,validated by experimental means different flow resistance flooding system can thus increase the local pressure gradient expanding the swept volume.The ability to establish a flow resistance of the polymer solution will change if polymer parameters are changed,through experimental study can be found that when variable is only,polymer solution with high residual resistance can cause better flooding effects and larger swept volume?According to the characteristics of high permeability,high oil viscosity and serious heterogeneity characteristics,flooding effects of heterogeneous reservoirs will be improved by flooding with polymer with high residual resistance factor,risk is reduced,development cycle is shortened.