通过室内实验及同位素测井技术评价高分子聚合物驱油效果

TO EVALUATE THE DISPLACEMENT EFFECT OF THE HIGH MOLECULAR POLYMER THROUGH IN-DOOR EXPERIMENT AND ISOTOPIC ELEMENT LOGGING TECHNOLOGY

2500万超高分聚合物室内驱油实验研究了聚合物分子量、浓度、粘度、聚用量、段塞组合等各项性能指标对驱油效果的影响。本文根据室内实验结果，在北一区断西注聚后期开展矿场试验，取得了较好的开发效果。试验前后对比，注入粘度明显增大，月含水上升速度得到有效控制，吸入剖面有了新的动用，有63．1%的油井出现了明显的二次受效特征，取得了显著的经济效益。同时对驱油效果进行系统分析。驱油效果表明：应用2500万超高分聚合物是进一步提高聚驱采收率的有效途径。

The displacement effect of the polymer with 25 million ultra-high molecules is studied in polymerieular weight,concentration,viscosity, dosage of polymer and slug combination through an in-door experiment.According to the result of the experiment,a field test was carried out in north No.1 area of Duanxi in the later period of polymer injection.It has gained good effect in oil development.Comparing the re- suits before and after the test,the injection viscosity is increased in evidence;monthly water containing speed is eontrolled effectly;the in- jection profile is used again;obvious secondary effect appears in 63.1% of oil wells,which can bring remarkable economic benefit. Through systematical analysis of the displacement effect,it shows that application of the 25-million-high-molecule polymer is an effective way to improve the recovery rate of polymer displacement.