Composition Temperature Separation @ 10 minutes Observation Break Colour Interface Sediment Non Retarded Mud Acid+Crude (1:1) 80 °F No separation at 10 mins. Only 30% of the acid fluid Dark brown homogenous mixture was formed upon agitation Not clean Brown Not too sharp None   150 °F 100% separation at 7mins:13secs Dark brown homogenous mixture was formed upon agitation Not clean Brown Not too sharp None   190 °F 100% separation at 3mins:48secs Dark brown homogenous mixture was formed upon agitation Not clean Brown Not too sharp None

Table 6: Emulsion break analyses for non-retarded mud acid + crude (1:1) fluid systems.