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Composite sterilization corrosion inhibitor for oil field and preparation method of composite sterilization corrosion inhibitor

A composite corrosion inhibitor technology, applied in the fields of botanical equipment and methods, biocides, chemical instruments and methods, etc., can solve the problems of decreased efficacy, unsatisfactory, and heavy operation workload, and achieves a high level of quality. Capacitive permeability, convenient on-site dosing, and simple preparation method

Pending Publication Date: 2019-09-20
山东东方盛嘉石油科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The fungicides and corrosion inhibitors currently added in oilfields are often added separately as two kinds of chemicals. After the two kinds of chemicals are mixed, there are often compatibility problems such as flocs and flocs, resulting in a serious drop in efficacy
In addition, separate dosing requires additional dosing equipment and a large operating workload
The current corrosion inhibitors in oilfield sewage are generally oleic acid imidazoline quaternary ammonium salt, pyridine quaternary ammonium salt, etc., and the fungicides are 1227 / 1427 quaternary ammonium salt or organic quaternary phosphorus salt, etc. Composite bactericidal corrosion inhibitor, even if it is effective, it is difficult to satisfy people, and it is difficult to meet the requirements of oilfield quality standards

Method used

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  • Composite sterilization corrosion inhibitor for oil field and preparation method of composite sterilization corrosion inhibitor
  • Composite sterilization corrosion inhibitor for oil field and preparation method of composite sterilization corrosion inhibitor
  • Composite sterilization corrosion inhibitor for oil field and preparation method of composite sterilization corrosion inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of oil field compound type bactericidal corrosion inhibitor, concrete steps are as follows:

[0020] Step 1: Put 25kg of oleic acid, 10kg of naphthenic acid and 18kg of diethylenetriamine into the reactor, raise the temperature to 160 degrees Celsius, turn on the condenser to cool the water, react for 2 hours, observe the water out, during which water should be formed and condensed take over;

[0021] In step 2, the reaction kettle is heated to 190 degrees Celsius, reacted for 2 hours, and then heated to 230 degrees Celsius, and after 4 hours of reaction, there should be basically no more water at this time, and the temperature is lowered to 50 degrees Celsius;

[0022] Step 3, add methanol 30kg again in the reactor, and the reactor was reacted at 42 degrees centigrade for 0.5 hour;

[0023] Step 4, pump 17kg of glacial acetic acid into the dripping tank, slowly drop it, the reaction is an exothermic reaction, control the speed of the dropp...

Embodiment 2

[0032] A kind of preparation method of oil field compound type bactericidal corrosion inhibitor, concrete steps are as follows:

[0033] Step 1: Put 30kg of oleic acid, 5kg of naphthenic acid and 18kg of diethylenetriamine into the reaction kettle, raise the temperature to 160 degrees Celsius, turn on the condenser to cool the water, and react for 2 hours, observe the water out, during which there should be water formed and condensed take over;

[0034] In step 2, the reaction kettle is heated to 190 degrees Celsius, reacted for 2 hours, and then heated to 230 degrees Celsius, and after 4 hours of reaction, there should be basically no more water at this time, and the temperature is lowered to 50 degrees Celsius;

[0035] Step 3, add methanol 30kg again in the reactor, and the reactor was reacted at 42 degrees centigrade for 0.5 hour;

[0036] Step 4, pump 17kg of glacial acetic acid into the dripping tank, slowly drop it, the reaction is an exothermic reaction, control the s...

Embodiment 3

[0045] A kind of preparation method of oil field compound type bactericidal corrosion inhibitor, concrete steps are as follows:

[0046] Step 1, put 22kg of oleic acid, 15kg of naphthenic acid and 20kg of diethylenetriamine into the reaction kettle, raise the temperature to 160 degrees Celsius, turn on the condenser to cool the water, and react for 2 hours, observe the water out, during which there should be water formed and condensed take over;

[0047] In step 2, the temperature of the reactor is raised to 190 degrees Celsius, reacted for 2 hours, and then heated to 230 degrees Celsius, and after 4 hours of reaction, there should be basically no more water at this time, and the temperature is lowered to 50 degrees Celsius;

[0048] Step 3, add methanol 25kg again in the reactor, and the reactor was reacted at 42 degrees centigrade for 0.5 hour;

[0049] Step 4: Pump 18 kg of glacial acetic acid into the dripping tank and add slowly, the reaction is an exothermic reaction, the...

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Abstract

The invention discloses a composite sterilization corrosion inhibitor for an oil field and a preparation method of the composite sterilization corrosion inhibitor and aims to solve the problem that a composite sterilization corrosion inhibitor which has a good sterilization effect and a corrosion inhibition effect as well is not available for an oil field. The product comprises the following raw materials in parts by weight: 18-35% of an intermediate, 10-20% of glutaraldehyde, 2-8% of thiourea, 5-10% of an alcohol solvent and the balance of water. The product is prepared by introducing naphthenic acid imidazoline acetate on the basis of an oleic acid imidazoline quaternary ammonium salt, and due to introduction of imidazoline of a cyclic hydrocarbon structure, not only are sterilization and corrosion inhibition coordinated, but also the compatibility and the permeability of a chemical upon raw oil can be improved, and together with the thiourea, the glutaraldehyde and the like, the composite sterilization corrosion inhibitor has good effects of sterilization and corrosion inhibition, has good specificity for oil-containing sewage of the oil field, has remarkable killing and inhibition functions on sulfate reducing bacteria, iron bacteria, saprophytic bacteria and the like in the oil-containing sewage, and has a good inhibition function on corrosion caused by sulfides, carbon dioxide, dissolved oxygen, saline ions and the like in the oil-containing sewage.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a composite bactericidal corrosion inhibitor for oil fields. Background technique [0002] Petroleum is one of the main objects of geological exploration. It is a viscous, dark brown liquid called "industrial blood". Petroleum is mainly used as fuel oil and gasoline, and is also a product of many chemical industries, such as solutions, fertilizers , pesticides and plastics, etc. [0003] Oil is usually extracted from oil fields, but domestic oil fields have caused great difficulties to oil extraction due to sewage corrosion problems, and replacement of pipelines and equipment will cause production stoppage and material loss. Sewage corrosion in oil fields is generally caused by harmful media in water such as Cl - 、HCO 2- other salt ions, and CO 2 、H 2 S, O 2 , Bacteria (sulfate-reducing bacteria, iron bacteria, saprophytic bacteria, etc., mainly sulfate-reducing bacter...

Claims

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Application Information

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IPC IPC(8): A01N47/28A01N35/02A01P1/00C02F1/50C23F11/08C02F103/36
CPCA01N35/02A01N47/28C02F1/50C02F2103/365C02F2303/08C23F11/08
Inventor 刘建芳杨礼刘堂辉付宝兵张锐杨丽史源清刘涛杨注学
Owner 山东东方盛嘉石油科技有限责任公司
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