Invert emulsion based completion and displacement fluid and method of use

A method of producing a hydrocarbon from a formation, the method comprising:

• drilling the formation with an invert emulsion drilling mud;
• performing at least one completion operation in the wellbore;
• emplacing a breaker fluid in the wellbore, the breaker fluid comprising:
• a non-oleaginous internal phase;
• and
• an oleaginous external phase,
• wherein the non-oleaginous phase comprises:
• a water soluble polar organic solvent;
• a hydrolysable ester of a carboxylic acid;
• and
• a weighting agent;
• and
• wherein the oleaginous external phase comprises:
• an oleaginous fluid;
• and
• an emulsifier;
• and
• shutting the well for a predetermined time to allow the hydrolysis of the ester and the breaking of the invert emulsion of the filter cake.

A solution, comprising:

• a non-oleaginous internal phase;
• and
• an oleaginous external phase,
• wherein the non-oleaginous phase comprises:
• a water soluble polar organic solvent;
• a hydrolysable ester of a carboxylic acid;
• and
• a weighting agent;
• and
• wherein the oleaginous external phase comprises:
• an oleaginous fluid;
• and
• an emulsifier.