|
| Research on retained polymer distribution laws by three-dimension network model |
| Revised:September 13, 2004 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20064085 |
| KeyWord:polymer flooding,microscopic simulation,retention,network model,oil recovery |
| HOU Jian LI Zhen-quan CHEN Yue-ming |
|
| Hits: 1518 |
| Download times: 20 |
| Abstract: |
| Re-use of retained polymer underground is a new method of enhanced oil recovery(EOR) after polymer flooding.Based on oil-water two phases network simulation model,the microscopic simulation model for polymer flooding was provided together with polymer seepage mechanism.Laws of retained polymer distribution and its influence factors were studied by microscopic numerical simulation,which can provide necessary information for EOR after polymer and proper re-use of retained polymer underground.Simulation results indicate that retained polymer occupies 61.7% of injected polymer because of polymer retention in pore/throat due to absorption and(or) entrapment.The amount of retained polymer in larger pores is larger while with smaller polymer concentration.Pore/throat radius and shape factor are main factors that can influence polymer's retention.The concentration of retained polymer located in pore /throat presents inverse ratio to the product of pore/throat radius and shape factor's square root. |