注水井作业用压井液体系的构建及应用  

CONSTRUCTION AND APPLICATION OF WELL CONTROL FLUID SYSTEM FOR WATER INJECTION WELL OPERATIONS

作　　者：李俊成[1] 王涛[1] 高洁[1] 张玉秋[1] 朱智勇[1] Li Juncheng;Wang Tao;Gao Jie;Zhamg Yuqiu;Zhu Zhiyong(Changqing Oilfield Third Oil Production Plant,Yinchuan 750000,Ningxia,China)

机构地区：[1]长庆油田第三采油厂,宁夏银川750000

出　　处：《精细石油化工》2024年第6期11-16,共6页Speciality Petrochemicals

摘　　要：针对压井液存在易污染地层,降低储层渗透率,压井作业风险大等问题,研究了一种密度在1.3~1.7 g/cm^(3)范围内可控的压井液体系,通过对压井液中各组分的筛选,确定了压井液的基本配方为:饱和盐水(NaCl)+1.5%~2.5%VI-F+1.0%~2.0%WET+3%PG-6+0.1%HY-3+B280。压井液的综合性能评价结果表明:压井液体系防膨率>95%,损害率<8%,滤失量<10 mL,表观黏度≤100 mPa·s,15 d内无沉降分层,具有良好的稳定性;现场试验表明,该压井液体系与地层配伍性良好,可实现有效压井作业,且对储层伤害性较小。In view of the problems of easily contaminating formation,reducing reservoir permeability,and high risks of well control operations with current well control fluids,this paper studies a controllable homogeneous well control fluids system with a density in the range of 1.31.7 g/cm^(3).Through screening the components of the homogeneous well control fluid,the basic formula of the well control fluid was determined to be:saturated saline water(NaCl)+1.5%2.5%VI-F+1.0%2.0%WET+3%PG-6+0.1%HY-3+B280.The comprehensive performance of the homogeneous well control fluid was also evaluated.The results show that the anti-swelling rate of the well control fluid system is greater than 95%,the damage rate is less than 8%,the filtration loss is less than 10 mL,the apparent viscosity is less than 100 mPa·s,and there is no settling or stratification within 15 days,indicating good stability.Field tests have shown that the well control fluid system has good compatibility with the formation,can achieve effective well control operation,and has minimal damage to the reservoir,making it wide applicable.

关 键 词：压井液 注水井作业 性能评价 现场应用 

分 类 号：TE358[石油与天然气工程—油气田开发工程]