速溶胍胶压裂液的研究与应用  

Research and Application of the Fast Hydrating Guar Fracturing Fluid

作　　者：银本才[1] 张高群[1] 肖兵[1] 陈波[1] 唐艳玲[1] 

机构地区：[1]中国石化中原油田井下特种作业处,河南濮阳457164

出　　处：《油田化学》2012年第2期159-161,189,共4页Oilfield Chemistry

摘　　要：在普通胍胶中加入悬浮稳定剂、醇类助剂、表面活性剂类胶体组成了相对稳定的速溶胍胶,其含水率为3.42%,水不溶物含量为8.76%。考察了影响压裂液质量的主要因素及由速溶胍胶配制压裂液的性能。实验结果表明:基液的起黏速度随搅拌速度增大而加快,1000 r/min下搅拌5 min时,基液黏度达到最终黏度的90%;最佳配液水温在10℃左右;最佳配液pH值为6;KCl的加入减缓了胶液的起黏速度,但最终黏度随KCl加量增大而升高。与硼交联后的冻胶体系的黏弹性增加,且在较高振荡频率时,G'>G″,在频率为1 Hz时,储能模量G'和损耗模量G″分别为9.8 Pa和8.8 Pa,可满足携砂性能。该冻胶体系的滤失系数Cw=2.65×10-4m/min1/2,滤失速率Vo=0.44×10-4m/min,具有较小的滤失量;在110℃、0.10%破胶剂条件下,24 h后破胶液的黏度小于2 mPa.s;对岩心的平均伤害率为11.24%。与常规配液方式相比,单井可节约胍胶15%以上,具有广阔的应用前景。The fast hydrating guar with water cut of 3.42% and the content of water-insoluble components of 8.76% was prepared by adding suspension stabilizer, alcohol additives surfactants in ordinary guar. The influence factors of the fast hydrating guar and the performance of the fracture fluid prepared by the fast hydrating guar were investigated. The results showed that, the viscosity of the base fluid reached to 90% of the final viscosity after stirring at 1000 r/min for 5 rain; The best water temperature of manufacture was around 10~C and the best pH value of manufacture was 6 ; the addition of KC1 prolonged the time required for viscosity reached to 90% of the final viscosity, however, the final viscosity increased with the increase of the KCI amount to some degree. The viscoelasticity of the boron crosslinked gels increased compared to that of the base gels, moreover, at relatively higher frequency, the storage moduli G was bigger than loss moduli G″, in particular, G′ and G″ was 9.8 Pa and 8.8 Pa at I Hz frequency, respectively, which could meet the needs of encapsulation of fine solids. The gel systems possessed good filtration property, filtration coefficient C, was of 2.65× 10 -4m/ min＇/2and filtration rate V0 was of 0.44 × 10-4 m/min. After treated by 0.10% gel breaker at 110℃, the viscosity of the breaking gel was less than 2 mPa.s and the average damage rate of the core was 11.24%. Compared with the conventional manufacturing way, the guar amount could be saved over 15% per well. As a result, the fast hydrating guar had the broad application prospect.

关 键 词：速溶胍胶 压裂液 水合机理 伤害 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]