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Resin compositions and methods of using resin compositions to control proppant flow-back

a technology of resin composition and flow-back, which is applied in the direction of drilling composition, chemistry apparatus and processes, and well accessories, etc., can solve the problems of inability to hardenable resin composition, inability to control the flow-back of proppant or formation fluid, and inability to harden resin composition, etc., to achieve the effect of improving the conductivity of subterranean formations, improving resin compositions and resin-coated proppants, and improving the conductivity of subterran

Inactive Publication Date: 2005-08-11
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] The present invention relates to enhancing the conductivity of subterranean formations while controlling proppant flowback. More particularly, the present invention relates to improved resin compositions and resin-coated proppants and their use in controlling proppant flowback.

Problems solved by technology

Flowback of the proppant or formation fines with formation fluids is undesirable as it may erode metal equipment, plug piping and vessels, and cause damage to valves, instruments, and other production equipment.
Using heretofore known hardenable resin compositions has been disadvantageous because they have short shelf lives.
When such pre-cured resin completes curing once placed in the subterranean formation, the resulting consolidated proppant pack often does not have enough strength to prevent deterioration of the proppant pack and proppant flowback.

Method used

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Examples

Experimental program
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Effect test

example 1

[0025] A resin of the present invention was prepared by mixing 0.75 mL of phenol, 6.1 mL of phenol formaldehyde, 2.55 mL of furfuryl alcohol, 0.1 mL of silane coupling agent n-beta-(aminoethyl)-gamma-aminopropyl trimethoxysilane, and 0.5 mL of an alkyl phosphonate surfactant. A volume of 7.5 mL of the resin mixture was then coated onto 250 grams of 20 / 40-mesh bauxite proppant. The coated proppant was then mixed with 300 mL of a fracturing fluid using carboxymethylhydroxypropyl guar as the gelling base. That gelled fluid was cross-linked with a zirconium cross-linker. The resulting viscous fracturing fluid comprising resin-coated proppant was stirred in a heated bath for 1 hour at 175° F. before being packed in brass flow cells. No closure stress was exerted on the cells and they were allowed to cure in an oven at various temperatures and for various lengths of time. Consolidated cores were obtained from the proppant packs to determine the unconsolidated compressive strength (UCS). T...

example 2

[0027] A modified API conductivity flow cell was used to perform proppant flowback testing to determine the effectiveness of the resin of the present invention in controlling proppant flowback. The conductivity flow cell was modified in that a 0.5-inch hole was installed a one end of the flow cell to simulate a perforation and a wire-mesh screen was initially inserted in the perforation to prevent production of the proppant. Ceramic proppant of 20 / 40-mesh was coated with 3% resin by weight of the proppant. The resin composition used was identical to that described in Example 1. The resin-coated proppant was then slurried into a viscous fracturing fluid as described in Example 1. The proppant slurry was packed into the modified conductivity cell to a loading of 2 lb / ft2 and set at an initial closure stress of 2,000 psi and a temperature of 150° F. After 2 hours, the temperature of the cell was increased to 300° F. and after 6 hours the closure stress was increased to 6,000 psi. The c...

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PUM

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Abstract

The present invention described a resin composition comprising from about 5% to about 30% phenol, from about 40% to about 70% phenol formaldehyde, from about 10 to about 40% furfuryl alcohol, from about 0.1% to about 3% of a silane coupling agent, and from about 1% to about 15% of a surfactant and methods of using of that resin in controlling particulate flowback from a subterranean formation.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to enhancing the conductivity of subterranean formations while controlling proppant flowback. More particularly, the present invention relates to improved resin compositions and resin-coated proppants and their use in controlling proppant flowback. [0003] 2. Description of Related Art [0004] Hydrocarbon-producing wells are often stimulated by hydraulic fracturing treatments. In hydraulic fracturing treatments, a viscous fracturing fluid, which also functions as a carrier fluid, is pumped into a producing zone to be fractured at a rate and pressure such that one or more fractures are formed in the zone. Particulate solids for propping the fractures, commonly referred to in the art as “proppant,” are generally suspended in at least a portion of the fracturing fluid so that the particulate solids are deposited in the fractures when the fracturing fluid reverts to a thin fluid to be returne...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/80
CPCC09K8/805C09K8/68
Inventor NGUYEN, PHILIP D.BARTON, JOHNNY A.ISENBERG, O. MARLENE
Owner HALLIBURTON ENERGY SERVICES INC
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