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Novel organic zirconium cross-linking agent and preparation method thereof

A zirconium cross-linking agent and organic technology, applied in the field of new organic zirconium cross-linking agent and its preparation, can solve the problems of endangering groundwater and reservoirs, poor formation adaptability, unfavorable environmental protection, etc. Effects of personnel and construction costs

Active Publication Date: 2015-11-04
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the poor adaptability of the existing technology to the formation, prepare with clean water, consume water resources; and seriously endanger groundwater and reservoirs, which is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately weigh raw materials: 5.36 kg of zirconium oxychloride octahydrate, 1.44 kg of citric acid, 6.27 kg of sodium thiosulfate, 50 kg of deionized water, 6.72 kg of ethylenediamine, and 0.03 kg of potassium chloride.

[0027] Preparation method: prepare zirconium oxychloride octahydrate, citric acid, sodium thiosulfate and deionized water at room temperature, stir and mix at 20-50 rpm to obtain mixed transparent solution A; then add potassium chloride to solution A Stir evenly at 20 rpm to obtain solution B; pour the above solution B into a three-necked flask, stir at 100-200 rpm, heat in a water bath at 80°C, and react for 20 minutes; after 20 minutes, slowly add B Diamine, the reaction time is 5h, and the semi-finished product solution C is obtained; the reaction is stopped and the product is obtained by suction filtration.

Embodiment 2

[0029] Accurately weigh raw materials: 5.36 kg of zirconium oxychloride octahydrate, 1.44 kg of citric acid, 6.27 kg of sodium thiosulfate, 50 kg of deionized water, 7.84 kg of ethylenediamine, and 0.04 kg of potassium chloride.

[0030] Preparation method: prepare zirconium oxychloride octahydrate, citric acid, sodium thiosulfate and deionized water at room temperature, stir and mix at 20-50 rpm to obtain mixed transparent solution A; then add potassium chloride to solution A Stir evenly at 20 rpm to obtain solution B; pour the above solution B into a three-necked flask, stir at 100-200 rpm, heat in a water bath at 80°C, and react for 20 minutes; after 20 minutes, slowly add B Diamine, the reaction time is 5h, and the semi-finished product solution C is obtained; the reaction is stopped and the product is obtained by suction filtration.

Embodiment 3

[0032] Accurately weigh raw materials: 5.36 kg of zirconium oxychloride octahydrate, 1.3 kg of citric acid, 6.27 kg of sodium thiosulfate, 50 kg of deionized water, 7.84 kg of ethylenediamine, and 0.04 kg of potassium chloride.

[0033] Preparation method: prepare zirconium oxychloride octahydrate, citric acid, sodium thiosulfate and deionized water at room temperature, stir and mix at 20-50 rpm to obtain mixed transparent solution A; then add potassium chloride to solution A Stir evenly at 20 rpm to obtain solution B; pour the above solution B into a three-necked flask, stir at 100-200 rpm, heat in a water bath at 80°C, and react for 20 minutes; after 20 minutes, slowly add B Diamine, the reaction time is 5h, and the semi-finished product solution C is obtained; the reaction is stopped and the product is obtained by suction filtration.

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Abstract

The invention relates to a preparation method of a novel organic zirconium cross-linking agent used for deep profile controlling and flooding as well as an application, which belongs to the technical field of oil field chemical increasing crude oil recovery efficiency. The organic zirconium cross-linking agent is synthesized by taking zirconylchloride octahydrate, citric acid and ethene diamine as basic raw materials, crosslinking time and viscosity can be delayed with effective control, various sewage with mineralization degree being 40000mg.L<-1> and calcium and magnesium ions content being 0-600mg.L<-1> can be cooperated, and a formed crosslinking polymer system is suitable for oil reservoir at temperature of 35-70 DEG C. In a deep profile controlling and flooding system, sewage can be used for substituting clear water, and can be a green no-pollution cross-linking agent with excellent performance and no harm on a reservoir layer, and the crude oil recovery efficiency can be increased. Problems of poor stratum adaptability, poor salt resistance, only compatibility with clear water, heavy pollution and large damage on the reservoir layer of a traditional cross-linking agent can be solved. The on-site test result shows that the cross-linking agent system enables compatibility with on-site sewage, has good gelling effect, and is benefit for environmental protection.

Description

technical field [0001] The invention relates to a novel organic zirconium crosslinking agent and a preparation method thereof, and belongs to the technical field of chemical flooding enhanced oil recovery. Background technique [0002] Water plugging and profile control of oil and water wells is an important technical means to control water, stabilize oil and improve water flooding efficiency in heterogeneous reservoirs. After most oilfields in my country have entered the high water-cut or ultra-high water-cut production period, due to the large difference in water injection layers, the high-permeability layers have strong water absorption capacity, forming water flow channels and ineffective water circulation, while the low-permeability layers cannot be injected with water. Based on the swept volume and injection water displacement efficiency, the profile control agent is used to plug the high permeability layer, so as to finally achieve the purpose of balancing the water ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/5083C09K8/512
Inventor 罗跃杨欢苏高申罗霄张黄鹤
Owner YANGTZE UNIVERSITY
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