Investigation on Invasion Depth of Fracturing Fluid during Horizontal Fracturing in Low-Permeability Oil Reservoirs with Experiments and Mathematical Models

Multistage fracturing in horizontal well has become one of the important techniques for efficient development low-permeability sandstone reservoirs. In multistage hydraulic fractured wells (MHFHWs), depth fluid invasion into formation is a key parameter evaluating imbibition enhancement after fracturing. However, few studies have been conducted on fluids combining experiments and mathematical models under high-pressure differences MHFHWs. Therefore, this work, model with experimental validation proposed high pressure. We first series displacement different pressure to obtain breakthrough time velocity. All core samples are taken from block X Xinjiang oilfield. A injection was then established, considering two-dimensional filtration fluid. Then, calculated velocity validated against data. Afterward, volume were determined typical well. Results show that at end 72 min, reaches 1.516 m when measured by 1.434 model. The total all stages estimated as 21,560.05 m3 actual injected 24,019.6 m3. paper formed scientific reasonable evaluation method during wells, which provides solid theoretical support effective improve oil recovery.