Though not as common as overbalanced drilling, underbalanced drilling is achieved when the pressure exerted on the well is less than or equal to that of the reservoir. Performed with a light-weight ...
Occidental Petroleum Corp. successfully performed post-fracturing cleanouts in Midland basin using aphron fluids in depleted reservoirs requiring light fluids with low leakoff properties. Comparison ...
Considerable research has been devoted to wellbore instability in shale formations, but wellbore stability in brittle shale is still not resolved. Oil-based drilling fluids (OBDF) provide outstanding ...
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