Emulsion paraffin remover for oil well as well as preparation method and application thereof

A technology of wax remover and emulsion, which is applied in the field of oil well emulsion wax remover and its preparation, can solve the problem of less wax remover products, and achieve the effect of effectively reducing viscosity by surface tension and remarkable effect of wax removal

Inactive Publication Date: 2018-08-03
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of wax removers currently used in oil fields, there are few w

Method used

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  • Emulsion paraffin remover for oil well as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] This embodiment provides an emulsion wax remover for oil wells, comprising the following components in parts by weight: 25-45 parts of diesel oil, 3-6 parts of gemini quaternary ammonium salt, 3-7 parts of fatty alcohol polyoxyethylene ether, lost 1.5-2.5 parts of sorbitan oleate, 2-5 parts of mutual solvent, 1-3 parts of sodium hydroxide, 35-60 parts of water.

[0023] The principle of the invention: Gemini quaternary ammonium salt, fatty alcohol polyoxyethylene ether, and sorbitan oleate three surfactants can play the role of wetting reversal, so that the surface of the wax deposition is reversed from the lipophilic surface to the hydrophilic surface. The water surface is conducive to the shedding of wax; the penetration of these substances can weaken the cohesion between the wax molecules and the pipe wall, so that it can be easily removed from the pipe wall, and the three surfactants play a synergistic effect to produce The effect of extremely low surface tension en...

Embodiment 2

[0026] On the basis of Example 1, this example provides an emulsion wax remover for oil wells, comprising the following components in parts by weight: 30 parts of diesel oil, 3 parts of Gemini quaternary ammonium salt, 5 parts of fatty alcohol polyoxyethylene ether , 1.5 parts of sorbitan oleate, 2 parts of mutual solvent, 1.5 parts of sodium hydroxide, and 57 parts of water.

[0027] Preparation process: Step 1) sequentially add the formula quantity of Gemini quaternary ammonium salt, fatty alcohol polyoxyethylene ether, and sorbitan oleate into the formula quantity of water, and stir evenly to obtain the mixture A;

[0028] Step 2) Add the formulated amount of mutual solvent and sodium hydroxide to the mixture A in sequence, and stir evenly to obtain the mixture B;

[0029] Step 3) Add the formulated amount of diesel oil into the mixture B and stir well to obtain the emulsion wax remover.

[0030] In this example, the diesel is 35 # For diesel oil, the gemini quaternary am...

Embodiment 3

[0032] On the basis of Example 1, this example provides an emulsion wax remover for oil wells, comprising the following components in parts by weight: 35 parts of diesel oil, 4 parts of Gemini quaternary ammonium salt, 4.5 parts of fatty alcohol polyoxyethylene ether , 2 parts of sorbitan oleate, 3 parts of mutual solvent, 2 parts of sodium hydroxide, 49.5 parts of water.

[0033] Preparation process: Step 1) sequentially add the formula quantity of Gemini quaternary ammonium salt, fatty alcohol polyoxyethylene ether, and sorbitan oleate into the formula quantity of water, and stir evenly to obtain the mixture A;

[0034] Step 2) Add the formulated amount of mutual solvent and sodium hydroxide to the mixture A in sequence, and stir evenly to obtain the mixture B;

[0035] Step 3) Add the formulated amount of diesel oil into the mixture B and stir well to obtain the emulsion wax remover.

[0036] In this example, the diesel is 35 # Diesel oil, the gemini quaternary ammonium s...

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Abstract

The invention provides an emulsion paraffin remover for an oil well as well as a preparation method and application thereof. The emulsion paraffin remover is prepared from the following ingredients inparts by weight: 25 to 45 parts of diesel, 3 to 6 parts of gemini quaternary ammonium salt, 3 to 7 parts of fatty alcohol-polyoxyethylene ether, 1.5 to 2.5 parts of sorbitan monooleate, 2 to 5 partsof mutual solvents, 1 to 3 parts of sodium hydroxide and 35 to 60 parts of water. Three kinds of surfactants can achieve the moisturizing and conversion effects, so that the paraffin forming surface is converted into the hydrophilic surface; the paraffin falling is facilitated; in addition, the three kinds of surfactants achieve the cooperated effects, the ultra-low surface tension effect is generated; the effective viscosity reduction can be realized. The emulsion paraffin remover has the advantages of oil-based paraffin removers and water-based paraffin removers; the defect of high toxicityof the oil-based paraffin remover and the defect of great temperature sensitivity of the water-based paraffin remover are avoided; in addition, no injury is caused on the environment and bodies of workers; the paraffin removing effect is obvious; the paraffin remover conforms to the development trend of the paraffin remover for the oil well in future.

Description

technical field [0001] The invention belongs to the technical field of wax removal for oil wells, and in particular relates to an emulsion wax remover for oil wells and a preparation method and application thereof. Background technique [0002] The wax content of crude oil in most oilfields in my country is relatively high, and some even reach as high as 40%. The wax in crude oil usually exists in liquid form under formation conditions. When the crude oil is pumped from the ground to the ground during the mining process, as the temperature and pressure drop, the crude oil’s ability to dissolve wax decreases, and the wax crystallizes from the crude oil in order of molecular weight. It precipitates and then settles around the well wall and in the production casing, causing damage to the reservoir. The wax deposition in the oil well seriously affects the normal production of the oil well, resulting in a decrease in oil well production or shutdown of oil well. Therefore, the re...

Claims

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Application Information

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IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 王祖文张冕李泽锋高燕王松兰建平邵秀丽王改红宇文昔涵安子轩陈建林姬随波李行朱著
Owner BC P INC CHINA NAT PETROLEUM CORP
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