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Deoiling agent for oilfield binary composite displacement output sewage and preparation method thereof

A binary compound and degreasing agent technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the complex preparation and use process, high cost, poor degreasing effect, etc. problems, to achieve the effect of simple preparation process and use process, good economic and social benefits, and weak flocculation ability

Active Publication Date: 2014-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binary compound flooding uses high-concentration polymer, sulfonate and surfactant injection system, and the produced fluid contains residues of polymer and surfactant, resulting in the emulsification degree of the produced fluid compared with that of the pure polymer produced fluid. The stability and difficulty of treatment are further increased. The effect of treating sewage with conventional treatment equipment and chemical treatment agents is not ideal. The impact of binary compound flooding produced fluid on surface gathering and transportation and sewage treatment is becoming more and more obvious.
Among them, the effect of physical treatment is generally unsatisfactory
Degreasing agents are commonly used in chemical methods. Degreasing agents are generally divided into the following two categories. One type has various components and has a better degreasing effect, but there are complex preparation and use processes, high costs, and partial requirements for water quality conditions. Low; Another type of degreasing agent has a single component, simple preparation and use process, low cost, and low water quality requirements, but has the disadvantage of poor degreasing effect

Method used

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  • Deoiling agent for oilfield binary composite displacement output sewage and preparation method thereof
  • Deoiling agent for oilfield binary composite displacement output sewage and preparation method thereof
  • Deoiling agent for oilfield binary composite displacement output sewage and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Degreaser A 1 And its joint station D in Shengli Oilfield 1 Applications

[0024] (1) Degreaser A 1 The composition and components are as follows:

[0025]

[0026] (2) Degreaser A 1 The specific preparation method is as follows:

[0027] ① React 40 parts of acryloyloxyethyl dimethylamine with 10 parts of methyl chloride to form a cationic monomer.

[0028] ②Mix 80 parts of acrylamide and 2 parts of N,N'-methylenebisacrylamide, add 300 parts of deionized water in 3 times, stir while adding, add the above cationic monomer after the dissolution is complete, and then add 0.5 Ammonium persulfate and 0.5 parts of sodium sulfite solution were stirred at 30°C for 5 hours to obtain degreaser A 1 , A 1 The structural formula is as follows:

[0029]

[0030] where m=10, n=3, p=0.1

[0031] Union Station D 1 The incoming water is the produced water of binary compound flooding, and the test treatment scale is 20m 3 / d, the oil content of incoming wat...

Embodiment 2

[0032] Embodiment 2: Degreaser A 2 And its joint station D in Shengli Oilfield 2 Applications

[0033] (1) Degreaser A 2 The composition and components are as follows:

[0034]

[0035] (2) Degreaser A 2 The specific preparation method is as follows:

[0036] ①React 50 parts of acryloyloxyethyl dimethylamine with 15 parts of chlorooctane to form a cationic monomer.

[0037] ②Mix 150 parts of acrylamide and 5 parts of N,N'-methylenebisacrylamide, add 500 parts of deionized water in 3 times, stir while adding, add the above cationic monomer after the dissolution is complete, and then add 1 One part of ammonium persulfate and one part of sodium sulfite solution, stirred at 45°C for 4 hours to obtain degreaser A 2 , A 2 The structural formula is as follows:

[0038]

[0039] where m=20, n=4, p=0.3

[0040] Union Station D 2 The influent water is binary compound flooding produced water, and the test treatment scale is 50m 3 / d, the oil content of incoming water is...

Embodiment 3

[0041] Embodiment 3: Degreaser A 3 And its joint station D in Shengli Oilfield 3 Applications

[0042] (1) Degreaser A 3 The composition and components are as follows:

[0043]

[0044] (2) Degreaser A 3 The specific preparation method is as follows:

[0045] ① React 30 parts of acryloyloxyethyl dimethylamine with 12 parts of chloropentane to form cationic monomers.

[0046] ②Mix 100 parts of acrylamide and 3 parts of N,N'-methylenebisacrylamide, add 500 parts of deionized water in 3 times, stir while adding, add the above cationic monomer after the dissolution is complete, and then add 0.8 One part of ammonium persulfate and 0.8 part of sodium sulfite solution, stirred at 60°C for 3 hours to obtain degreaser A 3 , A 3 The structural formula is as follows:

[0047]

[0048] where m=14, n=2, p=0.2

[0049] Union Station D 3 The incoming water is the produced water of binary compound flooding, and the test treatment scale is 20m 3 / d, the oil content of incomin...

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Abstract

The invention discloses a deoiling agent for oilfield binary composite displacement output sewage and a preparation method thereof. The deoiling agent comprises acryloyloxy ethyldimethylamine, chloroalkane, acrylamide, N,N'-methylene-bis acrylamide, ammonium persulfate and sodium sulfite. The preparation method comprises the following steps: reacting the acryloyloxy ethyldimethylamine and chloroalkane (CnH2n+1Cln=1-12) to generate a cationic monomer; and mixing the acrylamide and N,N'-methylene-bis acrylamide, adding deionized water by three times while stirring, completely dissolving, adding the cationic monomer, respectively adding ammonium persulfate and a sodium sulfite solution, and stirring at the constant temperature of 45 DEG C to react for 3-5 hours, thereby obtaining the deoiling agent. The deoiling agent is simple to prepare and convenient to use, and has the advantages of low chemical consumption, low cost and high deoiling ratio (higher than 90%); the separated recovered oil does not influence the subsequent crude oil dehydration; and therefore, the deoiling agent can be widely used in the oilfield binary composite displacement output sewage deoiling technique.

Description

technical field [0001] The invention belongs to the technical field of oil production sewage treatment, and in particular relates to a degreasing agent used for sewage produced by binary compound flooding in oil fields. Background technique [0002] With the continuous popularization and application of binary compound flooding technology, binary compound flooding has become an important means of improving oil recovery in oilfields. Binary compound flooding uses high-concentration polymer, sulfonate and surfactant injection system, and the produced fluid contains residues of polymer and surfactant, resulting in the emulsification degree of the produced fluid compared with that of the pure polymer produced fluid. The stability and difficulty of treatment are further increased. Conventional treatment equipment and chemical treatment agents alone are not effective in treating sewage. The impact of binary compound flooding produced fluid on surface gathering and transportation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
Inventor 徐鹏王刚徐闯杜春安潘永强曹功泽李彩风宋欣段传慧张守献曹嫣镔宋永亭
Owner CHINA PETROLEUM & CHEM CORP
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