Methods and compositons for forming subterranean fractures containing resilient proppant packs

a technology of resilient proppant and fractures, applied in the direction of sealing/packing, separation process, borehole/well accessories, etc., can solve the problems of affecting the back of proppant particles with formation fluid, affecting the production of metal goods, affecting the production of instruments and other production equipment,

Inactive Publication Date: 2004-03-04
HALLIBURTON ENERGY SERVICES INC
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  • Summary
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AI Technical Summary

Problems solved by technology

The flow-back of the proppant particles with formation fluids is very detrimental in that it erodes metal goods, plugs piping and vessels and causes damage to valves, instruments and other production equipment.

Method used

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Examples

Experimental program
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Effect test

example

[0040] A resin composition was prepared by mixing 8.2 milliliters of liquid hardenable resin component, 5.3 milliliters of liquid hardening agent component, and 3.4 milliliters of liquid latex agent. These components were mixed well to form a homogeneous mixture. A volume of 9.0 milliliters of this mixture was dry coated onto 250 grams of 20 / 40-mesh bauxite proppant. The treated proppant was then added to 300 milliliters of 35 lb per 1,000-gal carboxymethylhydroxypropyl guar fracturing fluid while the fluid was stirring with a stirrer. The slurry was placed in a heat bath at 180.degree. F. and continued to be stirred for 15 minutes to simulate the proppant slurry when it is being pumped downhole. After stirring, the treated proppant was packed in the flow chambers and placed in oven for 3-hour cure at 325.degree. F. without applying closure stress.

[0041] After curing, consolidated cores were obtained for unconfined compressive strength measurements and stress cycling testing. An ave...

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Abstract

Improved methods of forming fractures containing resilient proppant particle packs which prevent the production of sand and fines with produced fluids and prevent proppant flow-back in a subterranean zone penetrated by a well bore are provided. As the fractures are formed, a liquid hardenable resin component is mixed with a liquid hardening agent component and a liquid rubber component to form a hardenable resin composition. The hardenable resin composition is coated onto dry proppant particles which are suspended in the fracturing fluid and placed in the fractures. The hardenable resin composition on the resin composition coated proppant particles is allowed to harden and consolidate the proppant particles into high strength resilient permeable packs.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to improved methods of forming fractures containing resilient proppant particle packs which prevent proppant flow-back in subterranean zones penetrated by well bores.[0003] 2. Description of the Prior 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 proppant particles, e.g., graded sand for propping the fractures are suspended in a portion of the fracturing fluid so that the proppant particles are deposited in the fractures when the fracturing fluid is broken. That is, a breaker is included in the fracturing fluid whereby the fracturing fluid reverts to a thin fluid which is returned to the surface. The proppant particle packs forme...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K8/68C09K8/80
CPCC09K8/685Y10S507/924Y10S507/922C09K8/805
Inventor NGUYEN, PHILIP D.BARTON, JOHNNY A.
Owner HALLIBURTON ENERGY SERVICES INC
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