Study On The Adaptation Of Nitrogen Foam Enhance Heavy Oil Recovery

With the continuously development of the heavy oil reservoir in ShengLi Oil field, cyclicsteam stimulation as the one of the most common way to the heavy oil recovery has been atthe mid-late stage. Cyclic times of steam stimulation in oil wells are higher, and water cut ishigher in single well .The indicators, such as periodic crude output, daily production capacity ,oil/gas ratio are gradually decreased, so it become worse and worse in economic benefit andproduction effect.The reason why the effect of steam stimulation is getting down is that the inefficient orinvalid steam cross flow in the low residual oil saturated zone. It can reduce the efficient orinvalid steam cross flow through the help of the nitrogen foam profile control ,so as toincrease the oil production and reduce the water cut, and it can enhance the recovery ratio.The factors to impact the effect of the profile control by nitrogen foam are got ,after thegathering and sorting of a large amount of dynamic production data in the nitrogen foamprofile control stimulated wells in ShengLi Oil field. And a reservoir adaptive standard for themeasures of nitrogen foam stimulation is established, after the analysis of the theory and fielddata. The construction parameters of the measures are optimized, and then a set of measuresfor evaluation, decision, and prediction are formed. It has good significance guidance forincreasing the success rate and the development effect about the field application of thenitrogen foam profile control technology.