廊东油田表面活性剂降压增注实验研究

Experimental Research on Decreasing Injection Pressure With Surfactant in Langdong Oil Field

通过实验研究了表面活性剂降压增注效果及其注入方式对其效果的影响。实验选用了3种不同类型的表面活性剂进行分析,并针对廊东区块强水敏性储层添加了不同的粘土稳定剂和KCl。通过对实验结果的对比分析得出:针对廊东区块,Rpz-1与Hgs-1复配降压增注效果显著;另外,在油田注水开发前若采用表面活性剂增注液对储层进行预处理,则其注水效果将会更好,这样不但可以改善储层的性质,同时也可以降低后续注入水对储层的伤害。

The result of decreasing injection pressure with surfactant was studied as well as effect of different injection ways on the resuit. In experiment ,three groups of surfactants were analyzed, and some different clay stabilizer and KCl were added into surfactants owing to the high water sensitivity reservoir of Langdong oil field. The results indicate that the compound surfactant of Hgs - 1 and Rpz - 1 has higher efficiency to decrease injection pressure for Langdong oil field . Finally, the injection efficiency will be more preferable if the reservoir is pretreated by suffactant before injection, because such strategy can not only improve the properties of the reservoir but also can decrease the damage by the injection water.