一种泡沫酸体系的优选及评价

Optimization and Evaluation of a Foam Acid System

本文通过优选起泡剂、稳泡剂研制了一种泡沫酸体系,并对其性能进行了评价。筛选的HQ-03具有较强的起泡和稳泡能力,当浓度在1%时,半衰期为800 s左右。耐矿化度达40000 mg/L,加入稳泡剂后耐温达90℃。通过对不同渗透率级差的含油及含水岩心进行并联实验,研究结果表明,本文研制的泡沫酸体系对高低渗岩心有一定的选择性,能有效地实现临时封堵和导流,特别适合于非均质储层。

A foam acid system was developed by optimizing the foaming agent and the foam stabilizer,and its performance was evaluated.The selected HQ-03 has strong foaming and stabilizing abilities,with a half-life of about 800 seconds at a concentration of 1%.The mineralization resistance reaches 40000 mg/L,and the temperature resistance reaches 90℃after adding a stabilizer.The parallel experiment of oil-bearing and water bearing cores with different permeability levels shows that the developed foam acid system is selective for high and low permeability cores,and has good temporary plugging and diversion effect.The foam acid system is more suitable for heterogeneous formations.