N油田裂缝性油藏调剖技术研究

Study on Profile Control Technology in Fractured Reservoir of N Oilfield

针对N油田裂缝性油藏地质特点,前期调剖效果很不理想,开展新型调剖技术研究,以改善开发效果。现通过室内实验对现场提供的调剖剂进行了评价,在目前使用配方基础上,提出了改进方案,确定了适用于该油藏新的调剖剂配方体系,通过实验确定了适合于N油藏的新型调剖剂配方为0.25%聚合物;交联剂为0.4%乌洛托品+0.2%酚+0.1%酸,并通过室内岩心模拟实验评价最优配方调剖剂的封堵性能。结果表明,该配方适于N油田应用。

In consideration of the geologic characteristics of the fractured reservoir of N Oilfield,a new profile control technology was developed to improve the effect of oil production.The profile control agent supplied from the field was evaluated in a laboratory experiment,a improvement program was presented on the basis of the currently used formulation of profile control agent,and a new formulation of profile control agent suitable for use in this reservoir was identified.The formulation of the new profile control agent suitable for the reservoir of N Oilfield identified in the experiment contains 0.25%polymer,and the crosslinker is composed of 0.4%urotropine+0.2%phenol+0.1%acid.The plugging performance of the optimum profile control agent was evaluated through laboratory core simulation experiment,and the results of core simulation experiment have shown that this profile control agent can be used in N Oilfield.