Oilfield sewage treatment method

A technology of oilfield sewage and treatment methods, which is applied in the field of water treatment, can solve the problems of large dosage of chemicals, high investment, and large land occupation, and achieve the effects of high oil removal rate, small dosage, and high charge density

Inactive Publication Date: 2015-11-04
张哲夫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are that it occupies a large area, consumes a large amount

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Embodiment one:

[0058] A multifunctional treatment agent for oilfield sewage, which is composed of a demulsifier, a flocculant, a corrosion inhibitor, a surfactant and a bactericide; the mass parts of each component are 15-25 parts of demulsifier, 10-20 parts of flocculant, 20-25 parts of corrosion inhibitor, 5-10 parts of surfactant, 5-8 parts of fungicide;

[0059] Wherein, the demulsifier is made from the following raw materials in parts by weight:

[0060] Etherified starch 15

[0061] Cetyl ethoxylate 2

[0062] Pentaerythritol 5

[0063] Lauryl polyoxyethylene ether 12;

[0064] Wherein, flocculant is made from the raw material of following parts by weight:

[0065] Polyacrylamide 11

[0066] Triethanolamine 1;

[0067] Wherein, the corrosion inhibitor is made from the following raw materials in parts by weight:

[0068] Tetradecyldimethylbenzylammonium chloride 8

[0069] 1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole 9

[0070] Dioctyl phthalate 2

[007...

Example Embodiment

[0082] Embodiment two:

[0083] A multifunctional treatment agent for oilfield sewage, which is composed of a demulsifier, a flocculant, a corrosion inhibitor, a surfactant and a bactericide; the mass parts of each component are 15-25 parts of demulsifier, 10-20 parts of flocculant, 20-25 parts of corrosion inhibitor, 5-10 parts of surfactant, 5-8 parts of fungicide;

[0084] Wherein, the demulsifier is made from the following raw materials in parts by weight:

[0085] Etherified starch 18

[0086] Cetyl alcohol ethoxylate 5

[0087] Pentaerythritol 7

[0088] Lauryl polyoxyethylene ether 15;

[0089] Wherein, flocculant is made from the raw material of following parts by weight:

[0090] Polyacrylamide 15

[0091] Triethanolamine 4;

[0092] Wherein, the corrosion inhibitor is made from the following raw materials in parts by weight:

[0093] Tetradecyldimethylbenzylammonium chloride 15

[0094] 1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole 14

[0095] Dioctyl phthala...

Example Embodiment

[0107] Embodiment three:

[0108] A multifunctional treatment agent for oilfield sewage, which is composed of a demulsifier, a flocculant, a corrosion inhibitor, a surfactant and a bactericide; the mass parts of each component are 15-25 parts of demulsifier, 10-20 parts of flocculant, 20-25 parts of corrosion inhibitor, 5-10 parts of surfactant, 5-8 parts of fungicide;

[0109] Wherein, the demulsifier is made from the following raw materials in parts by weight:

[0110] Etherified starch 16

[0111] Cetyl alcohol ethoxylate 4

[0112] Pentaerythritol 6

[0113] Polyoxyethylene lauryl ether 13

[0114] Wherein, flocculant is made from the raw material of following parts by weight:

[0115] Polyacrylamide 13

[0116] Triethanolamine 2

[0117] Wherein, the corrosion inhibitor is made from the following raw materials in parts by weight:

[0118] Tetradecyldimethylbenzylammonium chloride 12

[0119] 1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole 13

[0120] Dioctyl phthala...

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Abstract

The invention relates to an oilfield sewage treatment method. 8-10 mg/L of an oilfield sewage treatment agent is added to oilfield sewage with the oil content ranging from 900 mg/L to 1200 mg/L, and the mixture is stirred for 20-40 min and then is left to stand for separation; the oilfield sewage treatment agent comprises components in parts by mass as follows: 15-25 parts of a demulsifier, 10-20 parts of a flocculating agent, 20-25 parts of a corrosion inhibitor, 5-10 parts of a surfactant and 5-8 parts of a bactericide. With the adoption of the method, effects of demulsification, flocculation, bridging, foaming, corrosion and scale inhibition and sterilization can be realized simultaneously, the usage amount of the oilfield sewage treatment agent is small, the oil removal rate is high, the corrosion and scale inhibition effect is obvious, and the method is particularly applicable to treatment of high-concentration oilfield sewage.

Description

technical field [0001] The invention relates to a treatment method for oilfield sewage, which belongs to the field of water treatment. Background technique [0002] In oilfields exploited by water injection, most of the water injected into the oil layer from the water injection well returns to the ground through the oil production well, and this part of the water must be removed before the crude oil is transported and exported, and the extracted sewage contains crude oil , so it is called oilfield produced water. With the increase of oilfield exploitation years, the water content of water production fluid has been rising, and some blocks have reached more than 90%. These oily sewage have become the main water injection water source of oilfields. With the continuous development of low-permeability oilfields and off-surface reservoirs around oilfields, the requirements for water quality of oilfield injection are more stringent. [0003] The composition of drilling wastewater...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/14C02F103/10
Inventor 张哲夫
Owner 张哲夫
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