关键词: 压裂, 连续混配

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