耐高温高盐黏弹性表面活性剂入井液的性能研究  

STUDY ON THE PERFORMANCE OF AN VISCOELASTIC SURFACTANT FLUID IN HIGH TEMPERATURE, HIGH SALINITY DOWNHOLE ENVIRONMENTS

作　　者：秦文龙[1,2] 李冉[1] 杨江[1,3] 周逸凝 姬思雪 

机构地区：[1]西安石油大学博士后创新基地/石油工程学院 [2]中国石油大学(北京)石油与天然气工程博士后科研流动站 [3]中石油勘探开发研究院廊坊分院

出　　处：《钻采工艺》2015年第2期91-94,11,共4页Drilling & Production Technology

基　　金：国家自然科学基金项目"黏弹性表面活性剂用于油气增产压裂液的应用基础研究"(项目编号51174163)和"热电纳米材料与高分子材料对清洁压裂液的协同增效机理研究"(项目编号51304159)资助

摘　　要：为满足高温、高盐油气藏生产作业的需要,研究了VES-HD复合型黏弹性表面活性剂在Ca Br2和Ca Cl2高密度盐水条件下的流变性能,并对影响其流变性能的各个因素进行了全面考察。研究结果表明,VES-HD表面活性剂可在1.55 g/cm3Ca Br2和1.30 g/cm3Ca Cl2超高密度盐水中形成黏弹性液体,该体系具有抗高剪切、对地层无伤害、易于降解等性能,150℃时该体系在两种盐水中的黏度仍可保持在60 m Pa·s以上。不同极性溶剂对该体系黏度有不同的影响,油和水可降低黏度,体系也可以兼容缓蚀剂。可作为新型的完井液、井下加重压裂液、作业液及砂控携液在油气田开发中应用。In order to meet the requirements of reservoirs production operation with high temperature and high salinity,the rheological properties of VES- HD complex viscoelastic surfactant in high density Ca Br2 and Ca Cl2 brine were studied by using Haake6000 rheometer,and the factors that affect the rheological properties were investigated comprehensively. The results showed that the VES- HD surfactant could form viscoelastic fluids in high density Ca Br2 and Ca Cl2 brine. The viscoelastic surfactant is resistance to shear and has no damage for formation and easy degradation. The fluid viscosity could maintain more than 60 m Pa · s at high temperature( 150℃) in two kinds of brine. The organic solvents had effect on viscosity. Oil and water could reduce the viscosity. The VES- HD complex viscoelastic surfactant can be used as new completion fluid,high density workover fluid,fracturing fluid and gravel- packing fluid in oil and gas exploration.

关 键 词：高密度入井液 黏弹性表面活性剂 流变性 影响因素 

分 类 号：TE39[石油与天然气工程—油气田开发工程]