| 本文已被：浏览次 下载次 |
码上扫一扫！ |
|
|
|
| Foam capacity in tertiary oil recovery and application in pilot |
|
WANG Qi-wei1,2,ZHENG Jing-tang1,CAO Xu-long2,GUO Ping2,U Xiang-liang2
|
|
(1. College of Chemistry and Chemical Engineering in China University of Petroleum, Dongying 257061,Shandong Province, China;2. Geological Scientific Research Institute of Shengli Oilfield Branch Company, Dongying 257015, Shandong Province, China)
|
| Abstract: |
| Tlie foam capacity in pore medium was investigated on in-house lab setup. The results show that foam has high flowing resistant, and its apparent viscocity is larger than any single coponent viscocity. The apparent viscocity of foam system increases with the permeability increasing. As a result of uniform distribution of foam pressure difference，end jam can't form. The block of foam has selectivity to oil and water. With low-content remaining oil, foam has strong block capacity and low flow velocity. With high-content remaining oil, foam has poor stability and weak block capacity. The foam system can enhance oil recovery by more than 20%. The pilot test results show that the foam can increase injection pressure enormously, improve the injection profile, enhance oil production and decrease water cut. |
| Key words: foam combination foam flooding block capacity block pressure difference tertiary oil recovery |
|
|