Abstract Different additives are added in the drilling mud to increase its efficiency terms of rheology and filtration properties. Recently, application ionic liquids (ILs) has been exploited by various investigators as a additive for improving rheology. The more recent studies have shown that imidazolium-based (the most used class fluids) toxic. Moreover, advancement green chemistry put big qu...

The “E” well to be drilled is a development in the “P” field located North Sumatra Basin. During drilling operation using HPWBM, HPWBM used overcome shale instability. This water-based mud because it cheaper and more economical than oil-based mud. However, this needs added with other chemicals has weakness controlling formation. system design for uses offset method, which data from nearby wells...

This research is about 1D geomechanical model for wellbore stability in Z Field, Y Well Sanga Working Area, Kutai Basin where wells have been drilled. The Purpose of this Research to analyze the well starting from knowing stress regime that occurs, predicting occurrence failure, and determining safe mud weight window next drilling. method use a numerical modelling using log data drilling has ob...