Performance Evaluation of Oil-based High-performance Water-based Drilling Fluids in Horizontal Wells
Shale oil and gas horizontal well drilling is difficult,facing the problems of borehole instability,friction,wellbore cleaning difficulty,conventional water-based drilling fluid operation is difficult,usually use oil-based drilling fluid operation,but the cost of oil-based drilling fluid is high,waste mud and drill cuttings treatment environmental protection pressure is high,research and development can replace oil-based drilling fluid strong inhibition oil-based high-performance water-based drilling fluid is imminent.According to the characteristics of shale horizontal wells,a set of oil-based high-performance water-based drilling fluids was constructed,and a full set of performance evaluations were carried out,which showed that the system had good anti-collapse,lubrication and rock-carrying properties,and had broad application prospects in shale oil and gas.
shale oil and gashorizontal wellshigh-performance drilling fluidsoil-like bases
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