Abstract: As for traditional fracturing process used for oil and gas fields, fracturing fluid is usually compounded in batches before fracturing operation is conducted. Therefore, some disadvantages exist, such as long preparation time, a large amount of work to be done, and environmental pollution caused by discharge of residual liquid. To solve those issues, Changqing Downhole Technology Service Company has independently developed the continuously-mixing vehicle and its related instant guar gum fracturing fluid system, forming the continuous compounding fracturing process and enabling fracturing liquid to be mixed along with fracturing operation in real time. In the operational process, instant guar gum and all the necessary chemical additives are added into the storage tank on the continuously-mixing vehicle according to the designed amount. The automatic control system is used for mixing and compounding and then the finally-pumped base liquid of fracturing fluid is in line with the designed requirements. The maximum single-unit mixing and discharging amount can reach eight cubic meters per minute at the time of real-time fracturing operation. Meanwhile, the viscosity of fracturing fluid can be tested online and the functions of fracturing fluid can be adjusted in real time to meet the need of operation, eliminating waste of fracturing fluid and reducing environmental pollution. The continuity, simple operation, and convenience in compounding fracturing fluid along with fracturing service effectively improve fracturing operational efficiency.

Key words: fracturing, continuous mixing, fracturing fluid

摘要： 传统的油气田压裂工艺多采用先批量配制压裂液再进行压裂施工作业的方式,存在着准备时间长、劳动强度大、残液排放污染环境等缺点。针对这些问题,自主研发了连续混配车及配套的速溶瓜尔胶压裂液体系,形成了连续混配压裂工艺,实现了配液与压裂施工实时进行,施工过程将速溶瓜儿胶及所有的化学添加剂按设计量加入连续混配车储藏罐,利用自动控制系统混合、配液,最后泵出符合设定要求的压裂液基液,实时进行压裂施工,最高单机混配排量可达8m3/min。同时可在线检测压裂液黏度,根据施工需要实时调整压裂液性能,消除压裂液浪费,减小环境污染。配液与压裂施工连续、紧凑,操作简单、方便,有效提高了压裂施工效率。

关键词: 压裂, 连续混配