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针对深层产水气井温度高(110~150℃)、矿化度高的特点,通过在普通液相泡排剂中引入合适尺寸、疏水程度的纳米粒子充当固态稳泡剂,使其吸附在气水界面形成稳定的空间壁垒,阻止气泡的聚并和歧化,从而极大地提高了普通液相泡排剂的起泡性与稳定性。为了给现场施工提供指导,利用高温高压泡沫评价仪实时评价研究了添加纳米粒子的泡排剂随浓度变化的性能,同时还考察了矿化度、温度、压力这3种外界因素对添加纳米粒子的泡排剂性能的影响。添加纳米粒子的泡排剂在矿化度为250 000mg/L下,其初始起泡体积V_0和泡沫半衰期t_(1/2)分别高达2 180mL和760s;在150℃高温下其初始起泡体积V_0与泡沫半衰期t_(1/2)分别高达1 925mL和700s;这些数据证明纳米粒子对泡排剂性能具有显著增强作用。该添加纳米粒子的泡排剂在重庆气矿现场应用效果良好。
Aiming at the high temperature (110-150 ℃) and high salinity of deep gas wells, nano-particles with proper size and hydrophobicity were introduced into the ordinary liquid-phase bubbler to act as solid foam stabilizer to make them adsorb to gas Water interface to form a stable space barrier to prevent the bubble of coalescence and disproportionation, thus greatly improving the ordinary liquid foam blowing agent foaming and stability. In order to provide guidance for on-site construction, the performance of bubble-blowing agent added with nanoparticles was studied by real-time evaluation using high-temperature and high-pressure bubble evaluation instrument. At the same time, three external factors, salinity, temperature and pressure, The effect of the performance of the foam agent. The initial bubble volume V_0 and the half-life of the foam t_ (1/2) were up to 2 180mL and 760s respectively when the salinity was 250 000mg / L with the nanoparticle-added foam bleaching agent. The initial foaming volume V_0 and foam half-life t_ (1/2), respectively, up to 1 925mL and 700s; these data demonstrate that nano-particles significantly enhance the performance of the foam agent. The nanoparticle-containing foam discharge agent applied well in Chongqing gas field.