纤维对压裂液携砂能力的影响  

Effects of Fiber on the Proppant Carrying Capacity of Fracturing Fluid

作　　者：刘玉婷[1] 管保山[1] 刘萍[1] 梁利[1] 程兴生[1] 邱晓慧[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院压裂酸化技术服务中心,河北廊坊065007

出　　处：《油田化学》2012年第1期75-79,共5页Oilfield Chemistry

基　　金：中国石油股份公司重大专项(纵向)项目37"煤层气完井与高效增产技术及装备研制"课题三"煤层气藏低伤害高效能压裂液"(项目编号2008X5037-003)

摘　　要：稠化剂浓度的降低会导致压裂液的携砂性能变差,进而影响压裂改造效果。而基液中加入纤维可以在降低压裂液中稠化剂浓度的前提下,保证甚至提高压裂液的携砂能力。静态携砂实验结果表明,随着纤维加量和纤维长度的增加,支撑剂的沉降速度降低。加入质量分数大于0.2%、长度大于8 mm的XW-3纤维即可有效改善压裂液的携砂能力,并且纤维对压裂液的耐温耐剪切性能没有影响。在变剪切实验中,随着纤维加量从0增至2.0%,黏度增值由335.9降为107.4 mPa.s。加入纤维后,剪切速率的降低对压裂液黏度升高的影响变小。含有纤维的压裂液中,支撑剂的沉降遵循Kynch定律。在长庆油田关X井的现场应用证实了纤维改善压裂液携砂能力的可行性。The decrease of gellant concentration would make the proppant carrying capacity of fracturing fluid become poor. Adding fiber in base fluid could reduce the concentration of gellant under the premise of ensuring the proppant pack stability. The effects of fiber to proppant pack stability were evaluated. Experiment results showed that the settling velocity of proppant decreased with increasing quantity and length of fiber. Fiber XW-3 with contem of 0. 2% and length of 8 nun could improve the proppant carrying capacity of fracturing fluid. And the addition of fiber was no influence on the temperature and shearing resistance to fracturing fluid. Rheological experiments showed that viscosity value increment reduced from 335.9 to 107.4 mPa.s when the dosage of fiber increased from 0 to 2.0%. Shear rate had smaller effect on the viscosity of fracturing fluid after adding fiber. Fracturing fluid containing fibers followed Kynch proppant sedimentation theory. The application of fracturing fluid in X well of Changqing oilfield on site indicated that fiber could improve the feasibility of fracturing fluid＇s carrying capacity.

关 键 词：纤维 压裂液 携砂能力 Kynch定律 长庆油田 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程] TE39