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Oil removing agent for produced water of binary combined flooding and preparation method thereof

A binary compound, degreaser technology, applied in chemical instruments and methods, special compound water treatment, water/sewage treatment, etc. and other problems, to achieve the effect of high oil removal efficiency, low addition amount and strong adaptability

Inactive Publication Date: 2017-11-03
YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binary compound flooding can significantly increase oil recovery and has broad application prospects. However, because the produced water of binary compound flooding contains a large amount of polyacrylamide and surfactants, the viscosity of sewage becomes larger and the diameter of oil droplets in sewage becomes larger. Small, resulting in serious emulsification of sewage, and its treatment is difficult
Degreasers are roughly divided into the following two categories. One type has various ingredients and good degreasing effect, but has the disadvantages of complicated preparation process, poor salt resistance and high cost; The process is relatively simple, and the requirements for water quality are relatively low, but it has the disadvantage of poor degreasing effect

Method used

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  • Oil removing agent for produced water of binary combined flooding and preparation method thereof
  • Oil removing agent for produced water of binary combined flooding and preparation method thereof
  • Oil removing agent for produced water of binary combined flooding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: Degreaser H 1 and its preparation method

[0029] (1) Degreaser H 1 The composition and its components are as follows:

[0030]

[0031] According to existing literature, the preparation method of described imidazole-based surfactant is as follows:

[0032]

[0033] (2) Degreaser H 1 The preparation method is as follows:

[0034] ①Put 20 parts of water in a beaker in a constant temperature water bath at 50°C, and slowly add 1 part of imidazole-based surfactant at a stirring rate of 200 rpm. After complete addition, continue stirring for 30 minutes to obtain a mixed solution A.

[0035] ② Adjust the temperature of the above constant temperature water bath to 30°C. After constant temperature, add 1 part of acrylamide to the above mixture A at one time, stir at 300rpm, stir for 40min, then raise the temperature to 50°C, stir at 50rpm, constant temperature for 40min, to obtain the mixed solution B.

[0036] ③Reduce the temperature of the above mixe...

Embodiment 2

[0037] Embodiment 2: Degreaser H 2 and its preparation method

[0038] (1) Degreaser H 2 The composition and its components are as follows:

[0039]

[0040] According to existing literature, the preparation method of described imidazole-based surfactant is as follows:

[0041]

[0042] (2) Degreaser H 2 The preparation method is as follows:

[0043] ①Put 25 parts of water in a beaker in a constant temperature water bath at 60°C, and slowly add 1 part of imidazole-based surfactant at a stirring rate of 350rpm. After complete addition, continue stirring for 45 minutes to obtain a mixed solution A.

[0044] ② Adjust the temperature of the above constant temperature water bath to 32°C. After constant temperature, add 5 parts of acrylamide to the above mixture A at one time, stir at 200rpm, stir for 30min, then raise the temperature to 60°C, and stir at a rate of 100 rpm, constant temperature for 60 minutes, to obtain the mixed solution B.

[0045] ③Reduce the temperat...

Embodiment 3

[0046] Embodiment 3: Degreaser H 3 and its preparation method

[0047] (1) Degreaser H 3 The composition and its components are as follows:

[0048]

[0049] According to existing literature, the preparation method of described imidazole-based surfactant is as follows:

[0050]

[0051] (2) Degreaser H 3 The preparation method is as follows:

[0052] ①Put 30 parts of water in a beaker in a constant temperature water bath at 70°C, slowly add 1 part of imidazole-based surfactant at a stirring rate of 500 rpm, and continue stirring for 60 minutes to obtain a mixed solution A.

[0053]② Adjust the temperature of the above constant temperature water bath to 35°C. After constant temperature, add 10 parts of acrylamide to the above mixture A at one time, stir at 400rpm, stir for 20min, then raise the temperature to 75°C, and stir at 150rpm, constant temperature 80min, to obtain the mixed solution B.

[0054] ③Reduce the temperature of the above mixed liquid B to 35°C. Aft...

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PUM

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Abstract

The invention specifically relates to an oil removing agent for produced water of binary combined flooding, belonging to the technical field of treatment of oil field wastewater. The oil removing agent is prepared from an imidazole-based surfactant, magnesium sulfite, acrylamide and water through compounding, wherein the imidazole-based surfactant is an imidazole inner salt with long-carbon-chain alkyl groups, hydroxyl groups and sulfonic groups. The oil removing agent provided by the invention has the advantages of simple preparation, strong salt resistance, low dosage, low cost and high oil removal rate, wherein the oil removing agent can resist salt with a concentration of 200000 mg / L and the oil removal rate reaches 95% or above; recovered oil produced after separation has no influence to subsequent dehydration of crude oil; and thus, the oil removal agent can be extensively applied to oil removing processes for produced water of binary combined flooding.

Description

technical field [0001] The invention belongs to the technical field of oilfield sewage treatment, and in particular relates to a binary compound flooding produced water degreasing agent and a preparation method thereof. Background technique [0002] Most of the oilfields in eastern my country have entered the late stage of high water cut. In order to enhance oil recovery, polymer injection flooding technology and binary compound flooding (polymer and surfactant) new tertiary oil recovery technologies have been widely used. Binary compound flooding can significantly increase oil recovery and has broad application prospects. However, due to the large amount of polyacrylamide and surfactant in the produced water of binary compound flooding, the viscosity of sewage becomes larger and the diameter of oil droplets in sewage becomes larger. Small, resulting in serious emulsification of sewage, and its treatment is difficult. The current conventional treatment process (natural sett...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/54C02F103/10
CPCC02F1/285C02F1/547C02F2103/10C02F2305/04
Inventor 赵世芬
Owner YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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