Breaker fluids for wellbore fluids and methods of use
AssigneeM-I L.L.C.
InventorDavid P. Kippie
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Abstract
Compositions for controlling fluid loss may include an aqueous fluid, a viscosifier, a water soluble polar organic solvent, a delayed acid source, and a weighting agent. The composition may further comprise at least one selected from bridging solids, cleaning agent, dispersant, interfacial tension reducer, pH buffer, thinner, or surfactant. Such compositions may be used in producing a hydrocarbon from a formation by drilling the formation with a drill-in fluid to form a wellbore, emplacing the composition in the wellbore, and shutting the well for a predetermined time to allow the viscosity of the fluid loss composition to decrease.
Claims27
A composition comprising:
- an aqueous fluid;
- a viscosifier;
- a water soluble polar organic solvent;
- a delayed acid source;
- and
- a weighting agent.
A method of producing a hydrocarbon from a formation, the method comprising:
- drilling the formation with a drill-in fluid to form a wellbore;
- emplacing a fluid loss composition in the wellbore, wherein the fluid loss composition comprises:
- an aqueous fluid;
- a viscosifier;
- a water soluble polar organic solvent;
- a delayed acid source;
- and
- a weighting agent;
- and
- shutting the well for a predetermined time to allow the viscosity of the fluid loss composition to decrease.
Dependencies are inferred from the claim text.