Laboratory study of nitrogen-foam agents proile control technology at heavy oil reservoir in Jinglou Oilield

This paper provides theoretical basis for the heavy oil reservoir in Jinglou Oil ield using of steam-Nitrogen foam agents. By means of laboratory experiments, static and dynamic evaluation of the foam agents got from oilield were made. The foam agents pa- rameters including surfactant concentration and nitrogen-liquid ratio were optimized. By measuring the consistency and resistance factor of foam agents with different quality score and different nitrogen-liquid ratio, the optical quality score of foam agents is 0.4%~0.5% and the optical nitrogen-liquid ratio is 1:1. Simulating the situation of heterogeneous reservoir in Core/Sand Pack Experiment when the max/min permeability ratio is 5 and 10, the comparison of steam continuous looding and nitrogen-active agents plug steam looding are made to optimize the reasonable operating parameters, the experimental results show that the optical injection parameter of nitrogen-ac- tive agents plug steam looding is 0.05PV.