Abstract: Boron neutron lifetime log developed from neutron lifetime is a new technology of dynamic monitoring suitable for low salinity formations. It is generally used in cased hole for deter-mining remaining oil salutation of formation with salinity by in-jecting borohidrade with high capture section into formations.
The technology can acquire the information of remaining oil in formation using“log-injection-log”technique by changing the properties of formation water near wellbore temporarily. It can guide potential tapping of measures in single wells effectively. Obvious effectiveness of oil increment is achieved in well Tong
61-Geng40 and well He68-24 by implemented measures on the basis of boron neutron lifetime log data.

Key words: boron neutron, lifetime log, remaining oil sat-uration, boron deviation, capture section