石油磺酸盐在高温高矿化度低渗油藏中的应用

Application of petroleum sulfonate salts in high temperature high salinity and low permeability reservoir

针对腰西区块油藏岩石渗透率低、温度高和注水矿化度高等特点,筛选胜利油田生产的石油磺酸盐类系列产品作为三采驱油剂,以解决腰西区块开采过程中出现的驱油困难等问题。利用仪器检测和实验室物理模拟方法,对适合腰西区块流体性质和油藏特点的配方体系进行优化。通过对该类油藏体系研究,确定最佳配方,对配方体系的界面张力、浓度窗口、热稳定性和洗油能力进行评价,结果表明胜利石油磺酸盐对此类油藏的三采驱油具有较好的评价效果。

Aiming at the character of high temperature high salinity and low permeability of Yaoxi reservoir,this paper screens Shengli petroleum sulfonate salts series products as flood- ing agent for eor,to solve th-e production of oil displacement problem in Yaoxi block.Equip- ment testing and physical simulation are used to optimize the formulation system.By testing interfacial tension, concentration window,thermal stability and wash oil capacity,the results show that Shengli petroleum sulfonate salts have a better evaluation results to this type of reservoir.