Neutral efficient blocking removal agent and preparation method thereof

An efficient and neutral technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of colloidal asphaltene polymer organic fouling, high acidification corrosion, environmental pollution, etc., to achieve improved stability , High plugging removal efficiency, and the effect of inhibiting water sensitivity

Pending Publication Date: 2022-05-27
陕西山秦能源技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a neutral and high-efficiency plug-removing agent and its preparation method, aiming to solve the problem that the conventional plug-removing agent in the prior art is acidification, which is easy to cause secondary pollution, acidification is highly corrosive, and will cause environmental damage. Pollution, while acidification is ineffective against colloidal bituminous polymer organic fouling technical issues

Method used

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  • Neutral efficient blocking removal agent and preparation method thereof
  • Neutral efficient blocking removal agent and preparation method thereof
  • Neutral efficient blocking removal agent and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, see figure 1 , the present invention also provides a preparation method of a neutral and high-efficiency blocking-relieving agent, comprising the following steps:

[0033] S1: by mass ratio, 5 parts of the EDTA-2Na, 1 part of the α-d-sodium glucoheptonate, 0.5 part of the β-d-sodium glucoheptonate, and 2.5 parts of the stabilizer , 2 parts of the alcohol alkyl glucamide active agent and 1 part of the monosaccharide are mixed and crushed by a grinding machine to obtain a mixed powder A;

[0034] S2: the obtained mixed powder A is screened through a 40-mesh sieve;

[0035] S3: add 0.5 part of the solubilizer and 28 parts of the water into the reaction kettle, carry out mixing and stirring at normal temperature, evenly add the mixed powder A during the stirring process, and after stirring for 50min, obtain the solution a ;

[0036] S4: filter the solution a through sterile gauze;

[0037] S5: adding 0.5 part of the enzyme to the solution a, stirring for 15 m...

Embodiment 2

[0041] Example 2, see figure 2 , the present invention also provides a preparation method of a neutral and high-efficiency blocking-relieving agent, comprising the following steps:

[0042] S1: by mass ratio, 15 parts of the EDTA-2Na, 8 parts of the α-d-sodium glucoheptonate, 5 parts of the β-d-sodium glucoheptonate, and 13 parts of the stabilizer , 10 parts of the alcohol alkyl glucamide active agent and 6 parts of the monosaccharide are mixed and crushed by a grinder to obtain mixed powder A;

[0043] S2: the obtained mixed powder A is screened through a 40-mesh sieve;

[0044] S3: add 5 parts of the solubilizer and 87.4 parts of the water into the reaction kettle, carry out mixing and stirring at normal temperature, evenly add the mixed powder A during the stirring process, and stir for 80min to obtain solution a ;

[0045] S4: filter the solution a through sterile gauze;

[0046] S5: adding 5 parts of the enzyme in solution a, stirring for 25min, and then leaving the ke...

Embodiment 3

[0050] Example 3, see image 3 , the present invention also provides a preparation method of a neutral and high-efficiency blocking-relieving agent, comprising the following steps:

[0051] S1: by mass ratio, 10 parts of the EDTA-2Na, 5 parts of the α-d-sodium glucoheptonate, 3 parts of the β-d-sodium glucoheptonate, and 7.5 parts of the stabilizer , 6 parts of the alcohol alkyl glucamide active agent and 3.5 parts of the monosaccharide are mixed and crushed by a grinding machine to obtain mixed powder A;

[0052] S2: the obtained mixed powder A is screened through a 40-mesh sieve;

[0053] S3: add 3 parts of the solubilizer and 60 parts of the water into the reaction kettle, carry out mixing and stirring at normal temperature, evenly add the mixed powder A during the stirring process, and after stirring for 70min, obtain the solution a ;

[0054] S4: filter the solution a through sterile gauze;

[0055] S5: add 3 parts of the enzyme in the solution a, stir for 20min, and ...

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Abstract

The invention relates to the technical field of unblocking agents, and particularly discloses a neutral efficient unblocking agent and a preparation method thereof, the neutral efficient unblocking agent comprises the following raw materials by mass: 5-15 parts of EDTA-2Na, 1-8 parts of alpha-d-sodium glucoheptonate, 0.5-5 parts of beta-d-sodium glucoheptonate, 2.5-13 parts of a stabilizer, 2-10 parts of an alcohol alkyl glucosamide active agent, 0.1-10 parts of an enzyme, 0.5-5 parts of a dissolution promoter, and 28-87.4 parts of water. The neutral efficient plug removal agent can effectively remove scales of barium sulfate, calcium sulfate and strontium sulfate, can also reduce viscosity, remove plug, remove part of oil dirt and improve the fluidity of crude oil, is high in plug removal efficiency, can effectively inhibit water sensitivity and eliminate water blocking, has good improvement and stabilization effects on stratum rock cores, does not damage oil reservoir skeletons, and is good in oil reservoir protection.

Description

technical field [0001] The invention relates to the technical field of blocking-relieving agents, in particular to a neutral and high-efficiency blocking-removing agent and a preparation method. Background technique [0002] At present, after long-term development of the oilfield, the scaling and precipitation of calcium, magnesium, barium and strontium metal ions in the formation, the migration of clay, the precipitation of colloidal asphaltenes in the crude oil, and the residual factors of adjusting and flooding polymers have caused various blockages, resulting in the decline of oil well production and the difficulty of water injection in water wells. Large and equipment pipelines are scaled and corroded. [0003] However, the conventional plug-removing agent is acidification, which is easy to cause secondary pollution, and is highly corrosive, which will pollute the environment, and at the same time, acidification is ineffective for the organic scale of colloidal asphalte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 陈连涛贺东旭邓校国梁新坤
Owner 陕西山秦能源技术服务有限公司
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