【摘要】 针对胜利油田牛35块油藏孔喉半径小、泥质含量高、微孔隙发育等储层特点,以商品酸、不同浓度盐酸和不同浓度土酸进行酸化效果实验,中等浓度盐酸或中等浓度土酸酸液综合效果最好。并通过实验筛选出以1.5%XFZ-1为铁离子稳定剂、4%CHG为互溶助排剂、1%-2%NH4Cl为防膨添加剂。确定的酸液配方表面张力小、腐蚀速度低,综合性能好。结合液态CO2助排工艺,现场试验取得了理想的酸化效果。更多还原

【Abstract】 Considering the characteristics of small pore throat radius, high mud content and tiny hole development in Niu 35 Block of Shengli Oilfield, the acidizing experiments in lab have been conducted by use of several kinds of acidizing fluids, including merchandise acid, hydrochloric acids and mud acid fluids with different concentrations. Results have shown that medium - concentration hydrochloric acids and mud acid fluid have a good comprehensive acidizing effects, 1.5% XFZ-1 is used as iron -ion stabilizer, 4% CHG as mutual solvent and 1%-2% NH4Cl as clay stabilizer. The determined acidizing fluid formulation has better properties, such as low surface tension and corrosion rate. In oilfield treatment, ideal acidizing effects have been made by combining artificial lift technology with liquid CO2.更多还原