Methods of Using Delayed Release Well Treatment Composititions
AssigneeBaker Hughes Holdings LLC
InventorsSumit Bhaduri, D.V. Satyanarayana Gupta, Shawn Shipman
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Abstract
A composite for controlling the release of a well treatment agent or for inhibiting or preventing the formation of contaminants into a fluid or a surface within a reservoir contains a well treatment agent adsorbed onto a water-insoluble or oil-insoluble adsorbent, the adsorbent having a surface area between from about 110 m2/g to about 700 m2/g. The composite may be also used to monitor the production of fluids from the reservoir or the flow of fluids in the reservoir.
Claims15
A method of controlling the release of a well treatment agent into a well or onto the surface of a subterranean formation penetrated a well, the method comprising pumping into the well a composite comprising the well treatment agent adsorbed onto a water-insoluble adsorbent wherein the well treatment agent inhibits or controls the formation of contaminants within the well by slowly releasing the well treatment agent into the well, wherein the surface area of the adsorbent is between from about 110 m2/g to about 700 m2/g.
A method of fracturing multiple subterranean zones surrounded by a wellbore which comprises:
- (a) pumping into each zone to be fractured a fracturing fluid, wherein the fracturing fluid pumped into each zone comprises a composite comprising a hydrocarbon soluble, water soluble or both hydrocarbon and water soluble tracer adsorbed onto a water-insoluble adsorbent, wherein the surface area of the adsorbent is between from about 110 m2/g to about 700 m2/g and further wherein the tracer introduced into each zone is qualitatively and quantitatively distinguishable;
- (b) solubilizing the tracer into fluids produced from the zone into which the composite comprising the composite is pumped;
- and
- (c) identifying the zone within the subterranean formation from which the recovered fluid was produced by identifying the tracer in the recovered fluid.
A method of increasing hydrocarbon production from a production well penetrating a hydrocarbon-bearing reservoir, wherein more than one injection well is associated with the production well, the method comprising:
- (a) injecting into the more than one injection well an aqueous fluid having a hydrocarbon soluble, water soluble or both hydrocarbon and water soluble tracer adsorbed onto a water-insoluble and oil-insoluble adsorbent, wherein the surface area of the adsorbent is between from about 110 m2/g to about 700 m2/g and maintaining pressure in the hydrocarbon-bearing reservoir;
- (b) identifying from hydrocarbons recovered from the production well, upon water breakthrough in the production well, the injection well into which the breakthrough water was injected by qualitatively determining the presence of the tracer in the recovered hydrocarbons;
- and
- (c) shutting off the injection well identified in step (b).
Dependencies are inferred from the claim text.