Under harsh high-temperature and high-salinity (HTHS) conditions, water-based drilling fluids (WBDFs) face a critical technical bottleneck in rheological control: the difficulty in simultaneously achieving yield point (YP) and gel strength enhancement without excessive viscosity increase while preventing the deterior...
Zhen-Hang Yuan, Xian-Bin Huang, Zhong-Yi Wang et al.· SPE Journal· 0 citations
During drilling operations, the continuous accumulation of low-gravity solids (LGSs) may progressively deteriorate the rheological properties of oil-based drilling fluids (OBDFs), thereby limiting fluid reuse. Centrifugation or dilution provides only limited rheological improvement. To identify the factors contributi...
Deep oil and gas resources have become a key strategic frontier for future reserve replacement and production growth. However, the complex downhole conditions in deep formations tend to reduce hole-cleaning efficiency and increase the risk of wellbore instability, making precise regulation of drilling fluid rheology...
Jin-Tao Weng, Jian-Long Wang, Ren Wang et al.· SPE Journal· 0 citations
Under high-temperature and high-pressure conditions, drilling fluids with long-term stability and low formation damage are one of the key technologies for ensuring safe and efficient drilling in deep reservoirs and achieving higher oil and gas production. In this study, a zwitterionic polymer (SPG) with high-temperat...
Tai-Feng Zhang, Jin-Sheng Sun, Kai-He Lv et al.· Energy & Fuels· 0 citations
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