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Method of slickwater fracturing

a technology of hydraulic fracturing and slickwater, which is applied in the direction of fluid removal, chemistry apparatus and processes, and wellbore/well accessories, etc., can solve the problems of easy shear degradation of polyethylene oxide, and achieve the effect of effective proppant carrying capacity, efficient pumping and high viscosity

Inactive Publication Date: 2013-01-31
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a way to use a special fluid called slickwater to fracture shale formations. The fluid contains a substance called polyethylene oxide (PEO) which reduces the friction of the fluid so it can flow more easily. However, PEO can get damaged when the fluid is pumped too quickly. To prevent this, a special polymer is included in the fluid to absorb the forces that damage PEO and keep it protected. This polymer also helps to thicken the fluid and carry the proppant (a substance used to keep the fracture open after the pumping is complete) effectively.

Problems solved by technology

However, polyethylene oxide is prone to shear degradation, which commonly occurs under turbulent flow conditions arising from high pressure pumping.

Method used

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Embodiment Construction

[0023]Illustrative embodiments of the invention are described below as they might be employed in the operation and in the treatment of oilfield applications. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. Further aspects and advantages of the various embodiments of the invention will become apparent from consideration of the following description.

[0024]The present invention is directed to a method of slickwater fracturing comprising introducing into a wellbore an ...

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Abstract

The present invention relates to a method of slickwater hydraulic fracturing of a subterranean formation comprising introducing into a wellbore an aqueous fracturing fluid comprising a nonionic polymer and polyethylene oxide.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a new method for hydraulic fracturing of a subterranean formation penetrated by a wellbore.BACKGROUND OF THE INVENTION[0002]Hydraulic fracturing techniques are widely used to stimulate oil and gas production from low-permeability reservoirs. During hydraulic fracturing, a fluid is injected into a wellbore under high pressure causing fractures to open around the wellbore and into the subterranean formation. Often a proppant, such as sand, is included in the fracturing fluid to keep the fractures open when the treatment is complete. Ideally, hydraulic fracturing creates high-conductivity communication with a large area of the formation allowing for an increased rate of oil or gas production.[0003]Slickwater fracturing is a type of hydraulic fracturing that uses a low viscosity aqueous fluid to induce the subterranean fracture. Slickwater fluids are basically fresh water or brine having sufficient friction reducing agent to m...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B43/26
CPCC09K8/68C09K2208/28F17D1/17C09K8/80C09K8/885C09K8/90E21B43/267
Inventor SUN, HONGQU, QISTEVENS, RICHARD
Owner BAKER HUGHES INC
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