Compositions for Treating a Well Penetrating a Subterranean Formation and Uses Thereof
AssigneeBJ Services Company
InventorsQi Qu, Richard F. Stevens, JR., David Alleman
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Abstract
Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of particular applicability in the displacement of oil base drilling muds and/or residues from such muds from producing wells. The water-in-oil emulsions may optionally contain a dispersing agent as well as a surfactant.
Claims20
A method of improving the permeability of a subterranean formation which comprises introducing into the formation a composition comprising a water-in-oil emulsion, wherein unwanted particulates deposited in the formation are dissolved or loosened by the outer phase and dispersed in the aqueous phase of the water-in-oil emulsion, thereby improving the permeability of the formation.
A method of improving the permeability of a subterranean formation which comprises introducing into the formation a composition comprising a water-in-oil emulsion, wherein the outer phase of the water-in-oil emulsion is a hydrophobic solvent and further wherein unwanted particulates deposited in the formation are dissolved or loosened by the outer phase of the water-in-oil emulsion, thereby improving the permeability of the formation.
A method of improving the permeability of a subterranean formation which comprises introducing into the formation a composition comprising a water-in-oil emulsion, wherein the external phase of the emulsion is a hydrophobic organic solvent and the internal phase comprises an aqueous salt solution, a mineral acid or organic acid, and further wherein particulates deposited in the formation are dissolved or loosened by the outer phase and dispersed in the aqueous phase of the water-in-oil emulsion, thereby improving the permeability of the formation.
A method of treating a well penetrating a subterranean formation comprising introducing into the well a composition comprising a water-in-oil emulsion, wherein said composition is capable of removing or inhibiting the formation of unwanted particulates within the well.
Dependencies are inferred from the claim text.