Abstract
ABSTRACTThe successful application of an All Oil-Base Mud (AOBM) system improved drilling performance and hole conditions on a deep well drilled in West Texas. The unique design of the AOBM combined with proper bit selection and successful down hole motor runs achieved higher penetration rates compared to offset wells in the area. The liquid phase of this AOBM system was prepared with a low viscosity-low toxicity base oil offering unique properties. This is the first drilling application of this mud design in an area of West Texas where the conventional oil mud system used is formulated with diesel and an emulsified brine phase. This paper reviews the AOBM fluid design, bit hydraulics program, directional drilling operations and associated performance improvements achieved on this well.
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