Methods and compositions for enhancing proppant pack conductivity and strength

a technology of conductivity and strength, applied in the field of subterranean formation treatment, can solve the problems of high cost of cureable resins, and achieve the effect of enhancing the conductivity and strength of proppant packs

Inactive Publication Date: 2008-01-10
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0001] The present invention relates to the treatment of subterranean formations. More particularly, the present invention relates to methods and compositions for enhancing proppant pack conductivity and strength.

Problems solved by technology

However, in some instances, precured proppants may flow back from a propped fracture, especially during clean up or production in oil and gas wells, because they are mainly held in the fracture by stress.
However, curable resins may be expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Consolidation strength testing was performed using a commercially available curable resin available under the trade name “EXPEDITE 225” from Halliburton Energy Services. Sample portions of equal volumes of 20 / 40 Brady sand were each coated with 3% of the curable resin composition containing variable amounts of silica flour as the filler particles. Sample 1 was the control and did not contain any silica flour. Sample 2 contained 5% silica flour. Sample 3 contained 10% silica flour. Sample 4 contained 20% silica flour. Sample 5 contained 40% silica flour.

[0031] The resulting unconfined compressive strengths of the proppant are given below in Table 1.

TABLE 1Compressive StrengthSample% Silica Flour(psi)101664251546310121542015265401096

[0032] From Table 1, it is evident that the resin-treated proppants achieve unconfined compressive strengths.

example 2

[0033] Consolidation strength testing was performed using a commercially available curable resin available under the trade name “EXPEDITE 225” from Halliburton Energy Services. In addition to filler particulates, a silane coupling agent was added to the curable resin composition. Sample portions of equal volumes of 20 / 40 Brady sand were each coated with 3% of the curable resin composition containing 40% silica flour, and variable amounts of a silane coupling agent. Sample 1 contained 1% of the silane coupling agent. Sample 2 contained 2% of the silane coupling agent. Sample 3 contained 4% of the silane coupling agent. Sample 4 contained 6% of the silane coupling agent was added.

[0034] The resulting unconfined compressive strengths of the proppant are given below in Table 2

TABLE 2% Silane CouplingCompressive StrengthSampleAgent(psi)11109622966341886461462

[0035] From Table 2, it is evident that the resin-treated proppants achieve unconfined compressive strengths.

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PUM

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Abstract

Methods comprising providing a curable resin composition that comprises a curable resin and at least a plurality of filler particles; and coating at least a plurality of particulates with the curable resin composition on-the-fly to form curable resin coated particulates. The curable resin coated particulates may be suspended in a treatment fluid and placed into at least a portion of a subterranean formation.

Description

BACKGROUND [0001] The present invention relates to the treatment of subterranean formations. More particularly, the present invention relates to methods and compositions for enhancing proppant pack conductivity and strength. [0002] Hydrocarbon-producing wells are often stimulated by hydraulic fracturing treatments. Hydraulic fracturing operations generally involve pumping a treatment fluid (e.g., a fracturing fluid or a “pad” fluid) into a well bore that penetrates a subterranean formation at a hydraulic pressure sufficient to create or enhance at least one or more fractures in the subterranean formation. The fluid used in the treatment may comprise particulates, which are often referred to as “proppant particulates,” that are deposited in the resultant fractures. The proppant particulates are thought to prevent the fractures from fully closing upon the release of hydraulic pressure, forming conductive channels through which fluids may flow to a well bore to ultimately be produced. ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B33/138
CPCC09K8/805
Inventor RICKMAN, RICHARD D.NGUYEN, PHILIP D.
Owner HALLIBURTON ENERGY SERVICES INC
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