Layered double hydroxides for oil-based drilling fluids
AssigneesSaudi Arabian Oil Company, Durham University, M-I Drilling Fluids UK Limited
InventorsMusarrat Halima Mohammed, Andrew Whiting, Hugh Christopher Greenwell, Manohara Gudiyor Veerabhadrappa, John Adrian Hall, Gasan Selman Alabedi, Michael Hayward Hodder
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Abstract
A method of preparing and a composition of an oil-based drilling fluid. An oil-based drilling fluid includes a base oil continuous phase, in which the base oil continuous phase includes a base oil, an aqueous dispersed phase, and at least one rheology modifier comprising a modified magnesium/aluminum carbonate layered-double hydroxide (Mg/Al—CO3 LDH) compound.
Claims17
An oil-based drilling fluid comprising:
- a base oil continuous phase, wherein the base oil continuous phase comprises a base oil;
- an aqueous dispersed phase;
- and
- at least one rheology modifier comprising a modified magnesium/aluminum carbonate layered-double hydroxide (Mg/Al—CO3 LDH) compound.
A method for preparing an oil-based drilling fluid, the method comprising:
- mixing a base oil, at least one emulsifier, and at least one wetting agent to form a base oil continuous phase;
- and
- adding at least one rheology modifier into the base oil continuous phase to form a oil-based drilling fluid, in which the at least one rheology modifier comprises a modified magnesium/aluminum carbonate layered-double hydroxide compound.
A method of drilling a subterranean well, the method comprising:
- operating a drill in a wellbore in the presence of an oil-based drilling fluid comprising:
- a base oil;
- at least one additive chosen from an emulsifier, a weighting material, a fluid-loss additive, a viscosifiers, or an alkali compound;
- and
- from 0.1 wt. % to 1 wt. %, based on the total weight of the drilling fluid, of a magnesium/aluminum carbonate layered double hydroxide compound.
Dependencies are inferred from the claim text.