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

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, ...

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 agents dissolve too rapidly, they may not remain in the subterranean formation for a long enough period of time or may not be delivered to the desired location in the subterranean formation.