耐高温低伤害VES-HT01压裂液的性能  

Properties of High Temperature Fracturing Fluids VES-HT01 with Low Formation Damage

作　　者：杨冠科 杨江[2,3] 管保山[2] 秦文龙[3] 

机构地区：[1]中国石油长城钻探工程公司,辽宁盘锦124010 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]西安石油大学石油工程学院,陕西西安710065

出　　处：《油田化学》2014年第1期29-32,共4页Oilfield Chemistry

基　　金：国家自然科学基金"粘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);"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)

摘　　要：用具有超分子结构的阴离子型表面活性剂VES-HT01与6%KCl复配,得到新型耐高温低伤害的阴离子VES压裂液。压裂液性能评价结果表明,在100 s-1剪切速率下,随温度升高,压裂液黏度先增加后降低,在100℃左右达到最高值180 mPa·s,150oC时的黏度为55 mPa·s。在140℃、170 s-1下剪切60 min,黏度基本保持不变。黏弹性较好。25℃、100℃下陶粒在压裂液中的沉降速率分别为5、33 mm/min,悬砂性较好。在50℃、100℃下分别加入2%、1%柴油静置120 min后,压裂液黏度为3 mPa·s,无残渣,破胶液表面张力为23.5 mN/m。抗菌性良好。成本与常规瓜尔胶压裂液相当。A high temperature fracturing fluid with low formation damage was developed by mixing supramolecular anionic surfactant （VES-HT01） and 6% KCl. Fracturing fluid evaluating experiment results showed that the viscosity of fracturing fluid increased first and then decreased with increasing temperature when the sheafing rate was 100 s-1. The maximum viscosity was 180 mPa. s at 100℃ and the viscosity was 55 mPa. s at 150℃. The fluid viscosity was unchanged after sheafing 60 min at 140℃ and 170 s-~, which showed good viscoelasticity. The settlement rate of ceramic proppant in fracturing fluid was 5 and 33 mm/min at 25℃ and 100℃, respectively. The VES gel could be broken with no residue by contacting with 2%, 1% diesel after 120 min at 50℃ and 100℃. The viscosity of broken-gel fluid was 3 mPa . s and surface tension was 23.5 mN/m. The fracturing fluid had good anti-microbial properties. The cost of fluid was comparable to that of conventional guar fracturing fluid.

关 键 词：压裂液 阴离子 黏弹性表面活性剂 高温 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程] TE39