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
Conventional fluid-loss reducers lack thermal and salt resistance and exhibit a pronounced viscosity-enhancing effect in bentonite-based drilling fluids. These issues will cause severe problems during drilling operations. Herein, a branched fluid-loss reducer, BPJ, was synthesized using BPEI1800 as the branching core a...
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
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