| VES-18清洁压裂液性能试验与应用 |
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| 引用本文： | 王维明. VES-18清洁压裂液性能试验与应用[J]. 煤田地质与勘探, 2010, 38(3): 24-26. DOI: 10.3969/j.issn.1001-1986.2010.03.006 |
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| 作者姓名： | 王维明 |
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| 作者单位： | 中国地质大学,北京,100083;中石油长城钻探工程有限公司煤层气开发公司,辽宁,盘锦,124010 |
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| 摘 要： | 用阳离子季胺盐和有机盐等复配制备VES-18清洁压裂液,对其主要性能进行了研究,并进行了现场应用试验。结果表明：VES-18具有很好的耐低温性和时间稳定性;在常温、170s-1剪切速率下,表观粘度为11mPa·s;在200~1000s-1区间内,随着剪切速率的增大,粘度缓慢下降,且下行粘度高于上行粘度;在应力扫描范围内,粘弹曲线中弹性模量一直大于粘性模量,属于弹性流体;模拟动态沉降时间大于粘度高的胍胶基液和丙三醇,体现了很好的携砂性能;少量的原油和自制破胶剂PJJ都可使VES-18在4h内完全破胶,破胶液粘度小于3mPa·s,破胶液表面张力较低,无残渣,破胶效果好,与地层配伍性良好。
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| 关 键 词： | 清洁压裂液 低粘度特性 耐剪切 粘弹性 模拟动态沉降 |
| 收稿时间： | 2009-07-18 |
Behavior and application of VES-18 clean fracturing fluid |
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| WANG Weiming. Behavior and application of VES-18 clean fracturing fluid[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(3): 24-26. DOI: 10.3969/j.issn.1001-1986.2010.03.006 |
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| Authors: | WANG Weiming |
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| Affiliation: | 1. China University of Geosciences, Beijing 100083, China;2. Coalbed Methene Develapment Company of Greatwall Drilling Company, CNPC, Panjin 124010, China |
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| Abstract: | VES-18 clean fracturing fluid is mixed with cationic quaternary ammonium and organic salt salicylate. The main behavior of VES-18 is investigated and tested on site. The results showed that VES-18 possessed a good temperature resistance and time stability. At room temperature and high shear rate of 170 s-1, the viscosity of VES-18 is about 11 mPa·s. As the shear rate increased from 200 s-1 to 1 000 s-1, the viscosity declined slowly. And the viscosity-shear rate-decreasing curve is higher than rate-increasing curve. The curve of viscoelasticity showed that the elastic modulus was always bigger than the viscous modulus at the range of the stress scan. In the test of the simulated dynamic sedimentation, the time of VES-18 is greater than the time of the higher-viscosity guanidine and glycerol, which reflected the good carrying capacity of VES-18. Both a small amount of crude oil and gel breaker PJJ could make VES-18 broken completely within 4 hours. The breaking results are satisfactory. The viscosity of the gel-breaking liquids is reduced to less than 3 mPa·s, and the surface tension is low. The gel-breaking liquids had no residue content and had good compatibility with the formation. |
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| Keywords: | clean fracturing liquid low viscosity behavior shear resistance viscoelasticity simulated dynamic sedimentation |
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