TY  - EJOU
AU  - Jiang, Zhiqiang 
AU  - Li, Zili 
AU  - Liang, Bin 
AU  - He, Miao 
AU  - Hu, Weishou 
AU  - Tang, Jun 
AU  - Song, Chao 
AU  - Zheng, Nanxin 

TI  - Performance Analysis of Foamed Fracturing Fluids Based on Microbial Polysaccharides and Surfactants in High-Temperature and High-Salinity Reservoirs
T2  - Fluid Dynamics \& Materials Processing

PY  - 2025
VL  - 21
IS  - 6
SN  - 1555-2578

AB  - Microbial polysaccharides, due to their unique physicochemical properties, have been shown to effectively enhance the stability of foam fracturing fluids. However, the combined application of microbial polysaccharides and surfactants under high-temperature and high-salinity conditions remain poorly understood. In this study, we innovatively investigate this problem with a particular focus on foam stabilization mechanisms. By employing the Waring blender method, the optimal surfactant-microbial polysaccharide blends are identified, and the foam stability, rheological properties, and decay behavior in different systems under varying conditions are systematically analyzed for the first time. The results reveal that microbial polysaccharides significantly enhance foam stability by improving the viscoelasticity of the liquid films, particularly under high-salinity and high-temperature conditions, leading to notable improvements in both foam stability and sand-carrying capacity. Additionally, scanning electron microscopy (SEM) is used to observe the microstructure of the foam liquid films, demonstrating that the network structure formed by the foam stabilizer within the liquid film effectively inhibits foam coarsening. The Lauryl betaine and Diutan gum blend (LAB+MPS04) exhibits outstanding foam stability, superior sand-carrying capacity, and minimal core damage, making it ideal for applications in enhanced production and reservoir stimulation of unconventional reservoirs.
KW  - Foam fracturing fluid; microbial polysaccharides; synergistic effect; stabilization mechanism; performance

DO  - 10.32604/fdmp.2025.062737