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Method for treating oil field ternary combination flooding extraction sewage

A three-element compound and sewage technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem that the sewage produced by the three-element compound flooding cannot be processed, and achieve the effect of overcoming environmental pollution

Active Publication Date: 2008-02-13
傅绍斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The method provided in the invention patent application with the publication number CN11757A and the application number CN01118163.X submitted by the applicant can only deal with ordinary oilfield sewage, but cannot deal with the produced sewage of ASP flooding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ASP flooding in an oilfield produced 1000ml of sewage, with salinity of 5213mg / l, polymer content of 456mg / l, surfactant content of 367mg / l, pH to 11.5, oil content of 428mg / l, and suspended solids of 103mg / l. The water temperature is 39°C.

[0023] Use method processing step of the present invention as follows:

[0024] (1) under the stirring speed of 2.5 meters / s, add 15ml concentration in the above-mentioned sewage and be the mixture of 10% aluminum chloride and hydrochloric acid, wherein the weight ratio of aluminum chloride to hydrochloric acid is 1 to 4, reacts 60 second;

[0025] (2) Then add 1 ml of cationic polyacrylamide (molecular weight: 12 million) solution with a concentration of 0.1%, and react for 30 seconds;

[0026] (3) After standing still for 3 minutes, the water treated in step (2) is subjected to solid-liquid separation treatment to remove impurities, and the water is effectively purified.

[0027] The purified water was tested for water quality...

Embodiment 2

[0031] A certain oilfield ASP flooding backwash sewage 1000ml, salinity 4658mg / l, polymer content 516mg / l, surfactant content 271mg / l, pH to 9.5, oil content 558mg / l, suspended solids 122mg / l. The water temperature is 38°C.

[0032] Use method processing step of the present invention as follows:

[0033] (1) under the stirring speed of 2.5 meters / s, add 16ml concentration to the above-mentioned sewage and be the mixture of 10% aluminum sulfate and sulfuric acid, wherein the weight ratio of aluminum sulfate to sulfuric acid is 1 to 3, and reacts for 70 seconds;

[0034] (2) Then add 0.8ml concentration of 0.1% cationic polyacrylamide (molecular weight is 14.5 million) solution, react for 40 seconds;

[0035] (3) After standing still for 3 minutes, the water treated in step (2) is subjected to solid-liquid separation treatment to remove impurities, and the water is effectively purified.

[0036] The purified water was tested for water quality, and the results are shown in Tabl...

Embodiment 3

[0040] ASP flooding in an oilfield produced 1000ml of sewage, salinity of 6103mg / l, polymer content of 368mg / l, surfactant content of 203mg / l, pH to 11.8, oil content of 318mg / l, and suspended solids of 93mg / l. The water temperature is 42°C.

[0041] Use method processing step of the present invention as follows:

[0042] (1) Under the stirring speed of 2.5 meters / s, in the above-mentioned sewage, adding 14ml concentration is the mixture of 10% aluminum chloride and sulfuric acid, wherein the weight ratio of aluminum chloride to sulfuric acid is 2 to 1, reaction 58 second;

[0043] (2) Then add 6ml concentration of 0.2% non-ionic polyacrylamide (molecular weight is 14.5 million) solution, react for 70 seconds;

[0044] (3) After standing still for 3 minutes, the water treated in step (2) is subjected to solid-liquid separation treatment to remove impurities, and the water is effectively purified.

[0045] The purified water was tested for water quality, and the results are ...

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PUM

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Abstract

The present invention relates to a sewage treatment method for treating a ternary composite in the oil field; the technical process of the present invention is that: the metal positive ion (such as aluminum or zinc), pH indicator and a macromolecule compound are added into the sewage in turn, and then to carry out the solid-liquid separation to purify the sewage. And then the sewage will reach the affusion standard. The sewage treatment method in the present invention can make the ternary composite in the sewage treatment process incapable of being treated by the general technology to realize the affusion standard so as to be used for the recycle in the oil field. The present invention can overcome the environment pollution with the discharge without needing being filtered.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a method for treating sewage produced by three-element compound flooding in an oil field. Background technique [0002] The sewage produced by ASP flooding in oilfields contains a large amount of polymers, alkalis, surfactants and petroleum. It has the characteristics of high viscosity, high pH value and good emulsification stability, and it is extremely difficult to treat. [0003] The method provided in the invention patent application with publication number CN11757A and application number CN01118163.X submitted by the applicant can only deal with common oilfield sewage, but cannot deal with the produced sewage of ASP flooding. Based on the above background, the present invention proposes a method capable of treating the produced sewage of ASP flooding. Contents of the invention [0004] The purpose of the present invention is to provide a method for treating sewage, which ca...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 傅绍斌朱业宏李杰训陈忠喜梅启太
Owner 傅绍斌
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