Alkali-resistant film-coating propping agent suitable for ASP compound flooding

A ternary composite and proppant technology, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of non-compliance with environmental protection requirements, poor chemical stability of alkali resistance, poor alkali resistance, safety and environmental protection, etc. Enhanced mechanical strength and stability, good sand control effect, good alkali resistance

Inactive Publication Date: 2019-06-28
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the resin liquid sand consolidation system in use has poor alkali resistance and chemical stability; the curing agent hydrochloric acid is a precursor raw material, which is strictly controlled; the fracturing flowback fluid contains residual acid, which does not meet environmental protection requirements
Therefore, in order to meet the needs of fracturing and sand control in the alkaline environment of ASP flooding, it is urgent to invent an alkali-resistant film-coated proppant suitable for ASP flooding to solve the problem of alkali resistance in the fracturing process of ASP flooding. Poor performance and safety and environmental protection issues

Method used

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  • Alkali-resistant film-coating propping agent suitable for ASP compound flooding

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specific Embodiment approach

[0015] Specific embodiments: The present invention will be further described in detail below in conjunction with specific examples: it consists of the following components by weight percentage: 90%-93% quartz sand, 2.5%-5% alkali-resistant resin, 1.3%-3.6% curing agent, 0.07% silane coupling agent, 1.5% diluent, 0.5% lubricant.

[0016] The alkali-resistant resin is one or any combination of epoxy resin methyl glycidyl ether, bisphenol A diglycidyl ether, and hexanediol diglycidyl ether.

[0017] The curing agent is an aliphatic modified amine curing agent.

[0018] The silane coupling agent is 3-aminopropyltriethoxysilane.

[0019] The diluent is propylene oxide butyl ether.

[0020] The lubricant is calcium stearate.

Embodiment 1

[0021] Embodiment 1, in the present embodiment the present invention is made up of following composition by weight percentage:

[0022] Quartz sand: 90%;

[0023] Methyl glycidyl ether: 5%;

[0024] Aliphatic amine modified amine curing agent: 2.93%;

[0025] 3-Aminopropyltriethoxysilane: 0.07%;

[0026] Propylene oxide butyl ether: 1.5%;

[0027] Calcium stearate: 0.5%;

[0028] The specific preparation process is:

[0029] 1. Put the quartz sand into the sand mixer and heat it to 120°C, add 3-aminopropyltriethoxysilane under stirring condition, and stir for 2 minutes;

[0030] 2. Add methyl glycidyl ether for coating and stir for 3 minutes;

[0031] 3. Cool to 100°C while stirring, add the homogeneous solution mixed with aliphatic modified amine curing agent and propylene oxide butyl ether, and stir for 2 minutes;

[0032] 4. Add calcium stearate and stir for another 2 minutes;

[0033] 5. Gradually cool the film-coated proppant while stirring, then sort and sieve to...

Embodiment 2

[0034] Embodiment 2, in the present embodiment the present invention is made up of following composition by weight percentage:

[0035] Quartz sand: 93%;

[0036] Bisphenol A diglycidyl ether: 3.63%;

[0037] Aliphatic amine modified amine curing agent: 1.3%

[0038] 3-Aminopropyltriethoxysilane: 0.07%;

[0039] Propylene oxide butyl ether: 1.5%;

[0040] Calcium stearate: 0.5%;

[0041] The preparation method is the same as in Example 1.

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Abstract

The invention relates to the technical field of oil field oil production engineering, and particularly belongs to an alkali-resistant film-coating propping agent suitable for ASP compound flooding. The propping agent mainly solves the problems that an existing coating film propping agent is not resistant to alkali, the propping agent is transferred in the ASP compound flooding process, accordinglyfracturing cracks are closed, and fracturing measures fail. The propping agent comprises, by weight, 90-93% of quartz sand, 2.5-5% of alkali-resistant resin, 1.3-3.6% of a curing agent, 0.07% of a silane coupling agent, 1.5% of a diluent and 0.5% of a lubricant. The alkali resistance of the film-coating propping agent is improved, so that the film-coating propping agent still has relatively highcompressive strength under a strong alkali system of ASP compound flooding, and requirements of the ASP compound flooding oil-water well fracturing measures are met.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in oil fields, in particular to an alkali-resistant film-coated proppant suitable for ASP flooding. Background technique [0002] ASP flooding is one of the main techniques for enhancing oil recovery in late stage oilfields with high water cut, which can increase recovery by about 20 percentage points. At present, the resin liquid sand consolidation system in use has poor alkali resistance and chemical stability; the curing agent hydrochloric acid is a precursor raw material, which is strictly controlled; the fracturing flowback fluid contains residual acid, which does not meet environmental protection requirements. Therefore, in order to meet the needs of fracturing and sand control in the alkaline environment of ASP flooding, it is urgent to invent an alkali-resistant film-coated proppant suitable for ASP flooding to solve the problem of alkali resistance in the fracturing pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 周万富王俐超刘向斌管公帅张新月其他发明人请求不公开姓名
Owner PETROCHINA CO LTD
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