Acid-free neutral chelation blocking remover for oil field

An acid-free, plug-relieving technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as failure, oil production wells, and corrosion of oil pumping equipment, so as to reduce injection pressure and increase injection pressure. Water quantity, the effect of overcoming the hidden danger of insecurity

Inactive Publication Date: 2019-05-21
陕西利源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the acidizing process, the acidizing corrosion inhibitor is susceptible to failure due to the influence of formation temperature, pressure and iron ions. Once the acidizing corrosion inhibitor fails, it will cause serious corrosion of oil production wells, oil pumps and oil transportation equipment. potentially huge risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of acid-free neutral chelating plug-removing agent for oil field, it comprises each raw material of following weight parts:

[0023] Ricinoleic acid 6, lithium ion doped polymer emulsion 100, sodium dichloroisocyanurate 0.4, penetrant 1, 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt 2, chelating agent 0.8.

[0024] The penetrating agent is cetyl alcohol polyoxyethylene ether.

[0025] The chelating agent is hydroxyethylidene diphosphonic acid.

[0026] Described lithium ion-doped polymer emulsion is made up of the raw material of following weight part:

[0027] Methyl methacrylate 30, ammonium persulfate 1, lithium chloride 4, butyl acrylate 10, beeswax 2, silane coupling agent kh5500.3, hydroxyethyl cellulose 2;

[0028] The preparation method of described lithium ion-doped polymer emulsion, comprises the following steps:

[0029] (1) Take beeswax, add it to 10 times its weight in absolute ethanol, stir evenly, add silane coupling agent kh550,...

Embodiment 2

[0035] A kind of acid-free neutral chelating plug-removing agent for oil field, it comprises each raw material of following weight parts:

[0036] Ricinoleic acid 9, lithium ion doped polymer emulsion 107, sodium dichloroisocyanurate 1, penetrant 2, 1-N-hydroxyethyl-2-alkylimidazoline quaternary ammonium salt 3, chelating agent 2.

[0037] Described penetrating agent is cetearyl alcohol ether.

[0038] The chelating agent is hydroxyethylidene diphosphonic acid.

[0039] Described lithium ion-doped polymer emulsion is made up of the raw material of following weight part:

[0040] Methyl methacrylate 40, ammonium persulfate 2, lithium chloride 5, butyl acrylate 15, beeswax 3, silane coupling agent kh5500.6, hydroxyethyl cellulose 3;

[0041] The preparation method of described lithium ion-doped polymer emulsion, comprises the following steps:

[0042] (1) Take beeswax, add it to 15 times its weight in absolute ethanol, stir evenly, add silane coupling agent kh550, raise the t...

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PUM

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Abstract

The invention discloses an acid-free neutral chelation blocking remover for an oil field. The blocking remover comprises, by weight, 6-9 parts of ricinoleic acid, 100-107 parts of a lithium-ion-dopingpolymer emulsion, 0.4-1 part of dichlord isocyanurice acid, 1-2 parts of a penetrating agent, 2-3 parts of 1-N-ethoxy-2-alkyl-imidazoline-ammonium-salt and 0.8-2 parts of a chelating agent. The blocking remover has low corrosivity, no waste acid is discharged in the blocking removal technology, and the blocking remover accords with the clean production principle.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and in particular relates to an acid-free neutral chelating plug-removing agent for oilfields. Background technique [0002] Many oilfields at home and abroad are plagued by scaling damage to varying degrees during water injection production, especially in the middle and late stages of production. With the increase of oil water content, scaling problems become more common and serious. Due to oilfield water scale damage to the oil layer, the wellbore of the oil production well, the wellbore of the water injection well and the oil production pump and equipment system are blocked, which leads to premature failure of the oil well, oil production pump and equipment. These problems have greatly increased the cost of oil recovery and seriously affected the normal production of oil and gas. In order to better solve the scaling problem of oilfield formations, oil production pumps and equipment, and solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
Inventor 袁海滨武娟郭超赵飞彭国勋陈辉张斌刘亭张涛刘洋张立原赵幸东野升富苗军李静瑞张威
Owner 陕西利源科技有限公司
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