Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof

A technology of injection booster and water injection well, which is applied in chemical instruments and methods, wellbore/well components, and production fluids, etc. It can solve the problems of oil production rate reduction, water injection efficiency reduction, and poor injection water quality in oilfields, and achieve excellent resistance. Scaling performance, high chelating and dispersing performance, good effect

Active Publication Date: 2012-01-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the development of the oilfield, the quality of the injected water is poor, with many suspended particles, and there are sulfate-reducing bacteria (SRB), iron bacteria, saprophytic bacteria, etc. After this type of oilfield is put into development, due to the incompatibility of the injected water and the formation water, precipitation occurs At the same time, it will aggravate the corrosion of the system, provide a place for bacteria to grow and reproduce, bring about corrosion and clogging problems, cause the water injection pressure to rise, the water injection efficiency will de

Method used

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  • Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof
  • Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1:

[0033] Add a certain amount of water to a steel reaction kettle with a capacity of 1000 liters, add cetyltrimethylammonium bromide with a weight content of 0.03%, stir evenly, and add MY / IMC-80BHH with a weight content of 0.05%. Etching agent, stir to dissolve completely, add 0.02% polyamino polyether methylene phosphonic acid by weight, stir to dissolve completely, and then add 0.01 polyquaternary ammonium salt, 0.05% citric acid, 0.1% hydrochloric acid, and the balance If it is water, stir evenly to obtain the product.

[0034] Use method and effect: Wuqi water injection station, in the water distribution room of the water injection station, use a dosing pump to pump the chemical depressurization enhancer into the high-pressure pipeline at the rate of 0.1% of the water injected into the station well. As the injected water is injected into the formation, measures The previous single well water injection pressure was 5.8MPa, after the measures, the single well ...

Example Embodiment

[0035] Example 2:

[0036] Add a certain amount of water to a steel reaction kettle with a capacity of 1000 liters, add 0.3% by weight cetyltrimethylammonium bromide, stir evenly, and add 0.1% by weight MY / IMC-80BHH slow Etching agent, stir to dissolve completely, add 0.01% polyamino polyether methylene phosphonic acid by weight, stir to dissolve completely, and then add 0.03% polyquaternary ammonium salt, 0.05% citric acid, 0.3% hydrochloric acid, and the rest The amount is water, stir evenly to obtain the product.

[0037] Use method and effect: Xinhua No. 1 transfer water injection station, use a dosing pump in the water distribution room of the water injection station to pump the chemical depressurization enhancer into the high-pressure pipeline according to the proportion of 0.3% of the water injected into the well. As the injected water is injected into the formation, Before and after the measure, the single well water injection pressure was 23.0MPa, and after the measure, t...

Example Embodiment

[0038] Example 3:

[0039] Add a certain amount of water into a steel reaction kettle with a capacity of 1000 liters, add 0.2% by weight cetyltrimethylammonium bromide, stir evenly, and add 0.2% by weight MY / IMC-80BHH slowly Etching agent, stir and dissolve completely, add 0.2% polyamino polyether methylene phosphonic acid by weight, stir and dissolve completely, and then add 0.02% polyquaternary ammonium salt, 0.03% citric acid, 0.3% hydrochloric acid and the rest The amount is water, stir evenly to obtain the product.

[0040] Use method and effect: Wangyao water injection station, in the water distribution room of the water injection station, use a dosing pump to pump the chemical depressurization enhancer into the high-pressure pipeline at the rate of 0.2% of the injected water volume of the well. As the injected water is injected into the formation, measures The previous single well water injection pressure was 18.6MPa, and after the measures, the single well water injection ...

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Abstract

The invention relates to a chemical pressure-reducing injection-increasing agent for an injection well and preparation and use thereof. The chemical pressure-reducing injection-increasing agent comprises the following components in percentage by weight: 0.03 to 0.3 percent of hexadecyl trimethyl ammonium bromide surfactant, 0.05 to 0.5 percent of MY/IMC-80BHH corrosion inhibitor, 0.1 to 0.3 percent of polyamino polyether methylene phosphonae, 0.01 to 0.03 percent of polyquaternium, 0.05 to 0.1 percent of citric acid, 0.1 to 0.5 percent of hydrochloric acid and the balance of water. The total amount of the injected water is 100 percent. The pressure-reducing injection-increasing agent is used in an amount which is 0.1 to 0.3 percent based on the weight of injected water. The pressure-reducing injection-increasing agent is added into a medicine adding device in a water injection station, uniformly mixed, pumped into a high-pressure pipe by a high-pressure pump and is injected into stratum with injected water to achieve a chemical pressure-reducing injection-increasing effect. The single-well pressure drop is about 15 percent.

Description

technical field [0001] The invention relates to a chemical pressure-reducing and injection-increasing agent for water injection wells in oilfields and its preparation and application. Background technique [0002] During the development of the oilfield, the quality of the injected water is poor, with many suspended particles, and there are sulfate-reducing bacteria (SRB), iron bacteria, saprophytic bacteria, etc. After this type of oilfield is put into development, due to the incompatibility of the injected water and the formation water, precipitation occurs At the same time, it will aggravate the corrosion of the system, provide a place for bacteria to grow and reproduce, bring about corrosion and clogging problems, cause the water injection pressure to rise, the water injection efficiency will decrease rapidly, and the normal injection will not be performed, which will reduce the oil production rate of the oil field and become a constraint to the long-term stable production...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/52E21B43/20E21B43/22
Inventor 刘爱华杨华杨全安曾亚勤何治武刘宁杨会丽董俊王小勇唐泽玮
Owner PETROCHINA CO LTD
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