| Popis: |
ASP flooding is an important EOR technique currently. five pilot tests have been conducted in Daqing oil field, obtaining good results whose incremental recovery is over 20%OOIP higher than water flooding[1,2], strong alkaline system is mostly adopted which is harmful to oil formation, leading to severe scaling and difficulty in treating produced fluid[3]. Taking advantage of weak alkaline ASP system that is developed newly in laboratory, small well space and fast effect show in pilot area, the representative SII12 formation was selected for weak alkaline ASP flooding pilot test in 2004, and evident result has been obtained. In this paper, the dynamic varying regularity of oil and water wells was analyzed systematically, the result and understanding were introduced, and some technical problems were discussed. |
