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High-water-cut heavy oil demulsifier used for oil fields and preparation method thereof

A technology of demulsifier and heavy oil, which is applied in the field of high water content heavy oil demulsifier and its preparation in oil fields, can solve the problems of slow dehydration process of crude oil, poor demulsifier effect, high preparation cost, etc., achieve good dehydration effect, low cost, The effect of easy access to raw materials

Active Publication Date: 2014-03-19
滨州乾坤化工机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing demulsifiers for heavy oil with high water content have technical problems such as complex raw materials, high preparation costs, large product consumption, slow dehydration process of crude oil, and poor demulsifier effect. Therefore, it is difficult to synthesize a demulsifier for heavy oil with high water content more and more urgent

Method used

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  • High-water-cut heavy oil demulsifier used for oil fields and preparation method thereof
  • High-water-cut heavy oil demulsifier used for oil fields and preparation method thereof
  • High-water-cut heavy oil demulsifier used for oil fields and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of demulsifier for heavy oil with high water content for oil field, the raw materials it adopts are polyethylene polyamine, bisphenol S, formaldehyde, KOH catalyst, ethylene oxide, propylene oxide, acetic acid, xylene, triethylene diamine, 2 - Methyl crotonate, epichlorohydrin, take the following process to synthesize:

[0032] 1) Synthetic initiator: Polyethylene polyamine and bisphenol S are added dropwise to formaldehyde solution at 30-60°C, the molar ratio of polyethylene polyamine, bisphenol S and formaldehyde is 1:5:4, and then the temperature is raised to 120 ℃ for 3 hours, and the product was freeze-dried to obtain a self-made phenamine-aldehyde resin starter.

[0033] 2) Synthesis of polyether: Under KOH catalysis, according to the operating conditions for preparing alkoxylation, the dosage of KOH catalyst is 0.22%-0.27%. Propylene oxide is catalyzed and polymerized by KOH, wherein the molar ratio of ethylene oxide to propylene oxide is 1:1, the product...

Embodiment 2

[0038] A kind of preparation method of high water content heavy oil demulsifier for oil field, preparation method comprises the following process steps:

[0039] 1) Synthetic initiator: Polyethylene polyamine and bisphenol S are added dropwise to formaldehyde solution at 50°C, the molar ratio of polyethylene polyamine, bisphenol S and formaldehyde is 1:7:5, and then the temperature is raised to 150°C for reaction After 3 hours, the product was freeze-dried to obtain a self-made phenamine-aldehyde resin starter.

[0040] 2) Synthesis of polyether: Under KOH catalysis, according to the operating conditions for preparing alkoxylation, the dosage of KOH catalyst is 0.25%, and under the conditions of 110°C and 0.2MPa, the initiator and ethylene oxide and propylene oxide Polymerization is catalyzed by KOH, wherein the molar ratio of ethylene oxide to propylene oxide is 2:1, the product is neutralized with acetic acid, and desalted by suction filtration to obtain polyether.

[0041]...

Embodiment 3

[0045] The dehydration effect of heavy oil with high water content is simulated in the experiment, and the evaluation method specified in the oil and gas industry standard SY-T5281-2000 crude oil demulsifier performance test method (bottle test method) is adopted in the experiment. The high water-containing heavy oil demulsifier PRJ-001 obtained in Example 2.

[0046] The experimental temperature is 70°C, the water content in the oil is 60.4%, and the oil-water ratio is 70:30. The experimental results are as follows:

[0047] Demulsification effect of different demulsifiers in table 1

[0048]

[0049]

[0050] Among them, PRO-001--PRO-007 are demulsifiers synthesized for heavy oil with high water content.

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Abstract

The invention relates to a high-water-cut heavy oil demulsifier used for oil fields and a preparation method thereof, belonging to the technical field of crude oil dehydration. The preparation method of the high-water-cut heavy oil demulsifier used for oil fields comprises the following steps: 1. synthesizing an initiator: dropwise adding a formaldehyde solution to polyethylene polyamine and bisphenol S at 30-60 DEG C, heating the materials to 100-150 DEG C to react for 1-5 hours, and freeze-drying a product; 2. synthesizing polyether: carrying out catalytic polymerization on the initiator as well as ethylene oxide and propylene oxide with KOH, neutralizing a product with acetic acid, and carrying out suction filtration and desalination; 3. synthesizing epoxy polyether: after diluting polyether with a xylene solution, reacting polyether with epoxy chloropropane to obtain epoxy polyether A; dropwise adding 2-methyl crotonate to triethylene diamine, and then reacting with epoxy chloropropane to obtain epoxy polyether B; 4. synthesizing a demulsifier: dissolving epoxy polyether A and epoxy polyether B in xylene to obtain the high-water-cut heavy oil demulsifier. The preparation method is simple in process, is convenient to operate and is accessible in raw materials and low in cost. The obtained demulsifier has the advantages of small dosage, high dehydration speed, good demulsification effect and the like.

Description

technical field [0001] The invention belongs to the technical field of crude oil dehydration, and in particular relates to a demulsifier for heavy oil with high water content and a preparation method thereof. Background technique [0002] Heavy oil refers to heavy crude oil with high viscosity. The division of heavy crude oil and light crude oil is generally based on its density, which is greater than 0.934g / cm 3 of heavy oil. As the recoverable reserves of ordinary crude oil decrease year by year, heavy oil will become the main energy source in the 21st century, but it is difficult to exploit heavy oil, so it also increases the difficulty of heavy oil utilization. In the late 1990s, the output of oilfields gradually decreased. In order to maintain crude oil production, all oilfields adopted the method of increasing crude oil production by increasing water injection, resulting in a rapid increase in the water content of the oil well production fluid. Many oil fields are alr...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 杜晓杰
Owner 滨州乾坤化工机械有限公司
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