Delivery system for oil-soluble well treatment agents and methods of using the same
AssigneeBaker Hughes Holdings LLC
InventorsSumit Bhaduri, Frances H. Debenedictis, D. V. Satyanarayana Gupta
Life of this patent
Estimating the term…
Abstract
A system for slowly releasing an oil-soluble well treatment agent into a well or a subterranean formation includes a composite of the oil-soluble well treatment agent associated with a second component. The amount of the oil-soluble well treatment agent in the composite is from 20 to 35 weight percent and the average particle size of the oil-soluble well treatment agent in the composite is less than or equal to 1 micrometer. The composite may further contain a water-soluble well treatment agent.
Claims20
A method of treating a well or a subterranean formation penetrated by a well which comprises pumping into the well an aqueous treatment fluid comprising at least one oil-soluble well treatment agent which, when pumped into the well, is a first component of a composite, the composite comprising the first component associated with a second component, the amount of the at least one oil-soluble well treatment agent in the composite being between from about 20 to about 35 weight percent based on the total weight of the composite and wherein the second component is a water-insoluble adsorbent or a calcined metal oxide and wherein the composite is prepared by contacting the second component with an aqueous dispersion composition, the aqueous dispersion comprising (i) the at least one oil-soluble well treatment agent dispersed in water;
- and (ii) a dispersing agent.
A method of treating a well or a subterranean formation penetrated by a well which comprises:
- (a) pumping into the well at least one oil-soluble well treatment agent selected from the group consisting of scale inhibitors, paraffin inhibitors, corrosion inhibitors, asphaltene inhibitors and mixtures thereof wherein the at least one oil-soluble well treatment agent, when pumped into the well, is a first component of a water-insoluble, oil-insoluble composite wherein the first component is associated with a second component and wherein (i) the composite is formed by contacting the second component with an aqueous dispersion comprising a dispersing agent and an oil-in-water dispersion having the at least one oil-soluble well treatment agent as the oil phase;
- (ii) the water-insoluble, oil-insoluble composite further comprises at least one water-soluble well treatment agent, (iii) the second component is a water-insoluble adsorbent or a calcined metal oxide;
- and (iv) the amount of the at least one oil-soluble well treatment agent in the composite is between from about 20 to about 35 weight percent based on the total weight of the composite;
- (b) solubilizing the at least one oil-soluble well treatment agent into produced fluid or hydrocarbons in the subterranean formation and/or well;
- and
- (c) solubilizing the at least one water-soluble well treatment agent in an aqueous fluid in the well or subterranean formation.
A method of treating a well or a subterranean formation penetrated by a well which comprises:
- (a) pumping into the well an oil-insoluble, water-insoluble well treatment composite comprising an oil-soluble first component immobilized by or within a second component wherein the composite is prepared by contacting the second component with an aqueous dispersion composition containing a dispersant and an oil-in-water dispersion having the oil-soluble first component as the oil phase wherein (i) the oil-soluble first component is selected from the group consisting of paraffin inhibitors, corrosion inhibitors, asphaltene inhibitors, scale inhibitors and mixtures thereof;
- (ii) the amount of the oil-soluble first component in the composite is between from about 20 to about 35 weight percent;
- and (iii) the second component is a water-insoluble adsorbent or a calcined metal oxide;
- and
- (b) solubilizing the oil-soluble first component into produced fluid or hydrocarbons in the subterranean formation.
Dependencies are inferred from the claim text.