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Low-temperature delayed-curing sand-control proppant, preparation method of proppant as well as low-temperature delayed-curing sand-control system

A proppant and curing agent technology, applied in chemical instruments and methods, mining fluids, earthwork drilling, etc., can solve problems such as poor temperature resistance and inability to cure, and achieve stable quality, convenient operation, and improved compression resistance. the effect of strength

Active Publication Date: 2015-12-02
HENAN TIANXIANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-temperature delay curing sand control proppant to solve the problem that the existing resin-coated sand control proppant has poor temperature resistance and cannot be cured at low temperature

Method used

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  • Low-temperature delayed-curing sand-control proppant, preparation method of proppant as well as low-temperature delayed-curing sand-control system
  • Low-temperature delayed-curing sand-control proppant, preparation method of proppant as well as low-temperature delayed-curing sand-control system
  • Low-temperature delayed-curing sand-control proppant, preparation method of proppant as well as low-temperature delayed-curing sand-control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The low-temperature delayed-curing sand control proppant of this embodiment is proppant particles, the proppant particles include quartz sand and a composite resin layer coated on the surface of the quartz sand, and the composite resin layer includes a resin inner layer and a resin outer layer The resin inner layer is a thermoplastic phenolic resin layer formed by thermoplastic phenolic resin; the resin outer layer is a mixed resin layer, and the mixed resin layer is composed of the following components in parts by weight: 2.0 parts of mixed resin, resin curing 0.01 part of agent, 0.01 part of silane coupling agent, and 0.05 part of dispersant; wherein, the mixed resin is a mixture of thermoplastic phenolic resin and epoxy resin in a mass ratio of 70:30; the quartz sand, resin inner layer and resin The mass ratio of the mixed resin in the outer layer is 100:2.0:2.0. The particle size of the proppant particles is 40-70 mesh (212-425 μm).

[0040] Wherein, the thermoplas...

Embodiment 2

[0043] The low-temperature delayed curing sand control proppant of this embodiment is composed of proppant particles and polyester fibers, the mass ratio of the polyester fibers to the proppant particles is 1:100; the polyester fibers are polyester coarse fibers, The average diameter is 1.2mm, and the average length is 8mm.

[0044] The proppant particles are the proppant particles described in Example 1.

[0045] The preparation method of the low-temperature time-delayed solidification sand control proppant in this example is as follows: 10 kg of quartz sand with a particle size of 212-425 μm is placed in a sand mixer, heated to 100° C., and 200 g of thermoplastic phenolic resin is added under stirring conditions. Continue to stir for 60s for the first coating; then continue to stir and add 200g of mixed resin, 1g of resin curing agent, 1g of silane coupling agent, continue to stir for 80s, then add 5g of dispersant, continue to stir for 30s for the second coating, discharge ...

Embodiment 3

[0047] The low-temperature time-delay solidification sand control system of this embodiment is composed of a solidification liquid and the low-temperature time-delay solidification sand control proppant of Example 2, and the volume ratio of the solidification liquid to the low temperature time delay solidification sand control proppant is 5:100; The curing liquid is a sand control curing agent solution with a mass concentration of 10%; in the sand control curing agent solution, the sand control curing agent is an imidazole curing agent (2-methylimidazole); the sand control curing agent solution also contains a surfactant , the surfactant is glycerol triacetate, and the addition of surfactant is: the surfactant of every 3g sand control curing agent is correspondingly added 1ml; The used solvent of described sand control curing agent solution is the mixture of water and ethanol , The amount of ethanol is: 10ml of ethanol is added for every 3g of sand control curing agent.

[004...

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Abstract

The invention discloses a low-temperature delayed-curing sand-control proppant, a preparation method of the proppant as well as a low-temperature delayed-curing sand-control system. The sand-control proppant comprises proppant particles, wherein proppant particles comprise quartz sand and composite resin layers, and the composite resin layers comprise inner resin layers and outer resin layers; the inner resin layers are thermoplastic phenolic resin layers; the outer resin layers comprise components in parts by weight as follows: 1.0-3.5 parts of mixed resin, 0.01-0.02 parts of a resin curing agent, 0.005-0.02 parts of a silane coupling agent and 0.05-0.1 parts of a dispersant; the mixed resin is a mixture of thermoplastic phenolic resin and epoxy resin; the mass ratio of the quartz sand to the inner resin layers to the mixed resin of the outer resin layers is 100:(0.5-2.0):(1.0-3.5). The temperature resistance and the compressive strength of the sand-control proppant are improved by the aid of the composite resin layer, and the sand-control proppant can be cured at the low temperature and even the normal temperature and can be adapted to stratums at different temperatures.

Description

technical field [0001] The invention belongs to the technical field of additives for oil (gas) development, in particular to a low-temperature delayed-cured sand control proppant, and also relates to a preparation method of a low-temperature delayed-cured sand-control proppant and the use of the low-temperature delayed-cured sand-control proppant A low-temperature time-delayed solidification sand control system. Background technique [0002] During the exploitation of oil and gas wells, sand production in oil wells is very harmful. If a large amount of sand is produced, the formation will be severely deficient, and cavities will easily form outside the reservoir casing, causing formation collapse, casing rupture and deformation, and even the oil well will be scrapped. In oil field fracturing production, chemical sand control methods are mainly used to strengthen the well wall and completion treatment to prevent oil wells from sanding. The sand control proppants used in che...

Claims

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Application Information

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IPC IPC(8): C09K8/80C09K8/92C09K8/575
CPCC09K8/5755C09K8/805C09K8/92
Inventor 张天成常春丽薛建国刘现伟
Owner HENAN TIANXIANG NEW MATERIALS
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