Compositions and methods for controlling the release of chemicals placed on particulates

a technology of chemical substances and subterranean formations, applied in the direction of cellulosic plastic layered products, natural mineral layered products, borehole/well accessories, etc., can solve the problems of not being able to remain in the subterranean formation for a long time, not being able to deliver, and affecting the quality of the produ

Inactive Publication Date: 2005-02-10
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0002] The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved

Problems solved by technology

However, treating agents placed on particulate material and introduced into a subterranean zone often dissolve into the fluids present in the subterranean zone too rapidly.
When the treating

Method used

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Examples

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Embodiment Construction

[0012] The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods for creating and using particulate materials having treating agents absorbed thereon and coated with a degradable coating material.

[0013] In the methods and compositions of the present invention, treating agents are adsorbed onto a particulate material, such as proppant or gravel, for introduction into a subterranean formation. In certain embodiments of the present invention, once the treating agents are adsorbed onto a particulate material, the particulate material is coated with a degradable coating material that temporarily shields the chemical from the fluids present in the subterranean formation until at least a portion of the coating degrades away, at which point the treating agent is exposed to the fluids in the subterranean formation and begins to be released. When a coated and treated particulate is mixed with a liquid such as a ...

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Abstract

The present invention relates to methods and compositions for creating and using particulate materials having treating agents absorbed thereon and coated with a degradable coating material. One embodiment of a method of the present invention provides a method treating to a subterranean formation comprising placing a coated, treated particulate into a subterranean formation wherein the coated, treated particulate comprises a particulate material having a treating agent placed thereon and a substantially complete layer of a degradable coating material coated placed thereon over the treating agent.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods for creating and using particulate materials having treating agents absorbed thereon and coated with a degradable coating material. [0003] 2. Description of the Prior Art [0004] Particulate materials are often introduced into subterranean zones in conjunction with fracturing and sand control treatments. [0005] A subterranean formation may be treated to increase its conductivity by hydraulically fracturing the formation to create one or more cracks or “fractures.” Such hydraulic fracturing is usually accomplished by injecting a viscous fracturing fluid into a subterranean formation at a rate and pressure sufficient to cause the formation to break down and produce one or more fractures. The fracture or fractures may be horizontal or vertical, with the latter usually predominating, ...

Claims

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Application Information

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IPC IPC(8): C09K8/516C09K8/536C09K8/70C09K8/80E21B43/04E21B43/267
CPCC09K8/516C09K8/536C09K8/706Y10T428/2998E21B43/04E21B43/267Y10T428/2991C09K8/80
Inventor NGUYEN, PHILIP D.
Owner HALLIBURTON ENERGY SERVICES INC
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