Study on the Performance of Drilling Mud Affected by High Temperature Emulsified Bitumen

Abstract

The performance of drilling mud influenced by high temperature emulsifier bitumen (HTEB) was studied in this paper. With high temperature emulsifier bitumen as mud additive, the Apparent viscosity (Av), Plastic viscosity (Pv) and Yield point (Yp) of drilling mud were increased before or after aging. The modulus particle size and average particle size of drilling mud were increased. Comparing with the particle sizes before aging, the particle sizes turn small and the rheological property change for the better after aging. The mud cake was thin, toughness and dense. The toughness of mud cake was increased, as high temperature emulsifier bitumen added. The surface of sandstone core and shale core were enwrapped tightly by high temperature emulsifier bitumen and there no crack appeared in the surface of core. The static filtration was 18.8 ml. The film could be form at the surface of debris, because of the high temperature emulsifier bitumen had adhesion.