Preparation of biogum thickener and properties of recoverable fracturing fluid based on environmental protection

Abstract

AbstractA recyclable biogum thickener was developed and employed as the main agent to compound a fracturing fluid system in order to address the issue of the problematic recovery of fracturing fluid system. By using infrared (IR), nuclear magnetic resonance (NMR), X‐ray diffraction (XRD), and scanning electron microscopy (SEM), the physical characteristics and microstructure were examined. By using a rheometer, dynamic filtration loss, and an acid‐etching fracture conductivity device, respectively, the system's temperature and shear resistance, dynamic filtration loss, and fracture conductivity damage were studied. The system's gum‐breaking performance, formation water compatibility, and anti‐expansion performance were then measured in accordance with standards. As a result of shearing at 170 s−1 and 120°C for 2 h, the 4% biogum system's performance outperformed the other two systems in every way, according to the experimental findings. Its viscosity could also exceed 70 mPa · s. After breaking, the solution had a viscosity of 2.5 mPa · s, which was very compatible with the formation water. The system has a 90% anti‐swelling rate, a filtration loss coefficient of 5.14 × 10−5, strong infiltration ability, and negligible formation damage. The biogum system's recovery rate after field application is discovered to be around 50%.