High-Temperature-Resistant Foam Drilling Fluid System: Advanced Thermal Stability Research for Deep Well Applications
1. Introduction High-temperature and high-pressure (HTHP) drilling environments demand advanced fluid systems capable of maintaining structural integrity and operational efficiency under extreme thermal stress. Conventional drilling fluids often degrade at elevated temperatures, leading to reduced foam stability, viscosity loss, and compromised wellbore control. This research introduces a novel high-temperature-resistant foam drilling fluid system engineered to enhance thermal endurance, improve rheological stability, and ensure effective cuttings transport in deep and ultra-deep wells. 2. Thermal Stability and Rheological Performance Analysis This topic investigates the rheological behavior of foam drilling fluids under elevated temperature conditions. Laboratory testing evaluates viscosity retention, foam half-life, and shear resistance across various temperature ranges. The findings highlight the importance of polymer stabilizers and surfactant optimization in preserving fl...