靖边采油厂水敏性油藏粘土稳定剂研究

靖边采油厂长2储层粘土矿物质含量较高，属强水敏性地层，在注水过程中引起的储层伤害问题严重，水敏伤害高达72．5％，因此，对其进行储层保护意义重大。本文通过粘土防膨实验和岩心流动实验对NH4Cl、PCD,PDADMAC有机小阳离子化合物4种粘土稳定剂进行评价，在此基础上综合考察pH值变化对粘土稳定剂防膨效果影响。实验结果表明：粘土稳定剂配方为2％NH4Cl＋2％PDADMAC时，渗透率保持率高达95．20％，当注入水pH值在6-8之间时，该配方渗透率保持率为90．61％～95．20％，防膨性能稳定，对储层保护较好。

Study of clay stabilizers on water sensitive formation of Chang 2 oil-bearing sand bodies in Jingbian Oil-Field

The content of clay mineral is high in Chang 2 oil-bearing sand bodies of Jingbian Oil-Field, which made the formation has the characteristic of water sensitivity, and the formation damage caused by injection water is 72.5%, so it's important to take reservoir protection in this oil-field. The evaluation of some clay stabilizers on clay expanding is described in this paper, and also the affect of pH for lay stabilizers on clay expanding is shown. Based on the results of the experiments it can conclude that ...