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Application of high-temperature corrosion inhibitor in tertiary oil recovery process

A technology of high-temperature corrosion inhibitor and foam stabilizer, which is used in earth-moving drilling, drilling composition, wellbore/well components, etc. Good compatibility, improving foaming rate and half-life, and wide application range

Inactive Publication Date: 2018-11-23
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of sewage water is relatively complex, and its salinity, hardness (Ca 2+ , Mg 2+ ), Fe 2+ , microorganisms, oxygen content, etc. all affect the use of polymer agents, pipelines, and equipment

Method used

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  • Application of high-temperature corrosion inhibitor in tertiary oil recovery process
  • Application of high-temperature corrosion inhibitor in tertiary oil recovery process
  • Application of high-temperature corrosion inhibitor in tertiary oil recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-temperature corrosion inhibitor for tertiary oil recovery, the mass parts of each component are as follows:

[0029] Alkyl imidazoline: 20 parts; Diethylene triamine: 15 parts; Rosin amine: 6 parts; Dodecyl dimethyl benzyl chloride: 0.5 parts; Trimethoprim (TMP): 0.5 parts; Dispersant : 15 parts; Vitamin C: 1 part; Water: 23 parts.

[0030] The preparation method of the above-mentioned high-temperature corrosion inhibitor for tertiary oil recovery is as follows: add the above-mentioned ratio of alkylimidazoline and diethylenetriamine into a four-necked flask, add 10% of the water that needs to be added, heat up to 78 ° C, and stir for 1 hour. Then add dodecyl dimethyl benzyl chloride, trimethoprim (TMP), dispersant, vitamin C, and rosin amine in proportion, stir for 30 minutes, add the remaining water and mix evenly to obtain high-temperature composite acidification corrosion inhibition agent.

Embodiment 2

[0032] A high-temperature corrosion inhibitor for tertiary oil recovery, the mass parts of each component are as follows:

[0033]Alkyl imidazoline: 25 parts; Diethylene triamine: 16 parts; Rosin amine: 7 parts; Dodecyl dimethyl benzyl chloride: 0.6 parts; Dimethoprim: 0.5 parts; parts; vitamin C: 0.05 parts; water: 20.85 parts.

[0034] The preparation method of the above-mentioned high-temperature corrosion inhibitor for tertiary oil recovery is as follows: add the above-mentioned ratio of alkylimidazoline and diethylenetriamine into a four-necked flask, add 10% of the water that needs to be added, heat up to 78 ° C, and stir for 1 hour. Then add dodecyl dimethyl benzyl chloride, trimethoprim (TMP), dispersant, vitamin C, and rosin amine in proportion, stir for 30 minutes, add the remaining water and mix evenly to obtain high-temperature composite acidification corrosion inhibition agent.

Embodiment 3

[0036] A high-temperature corrosion inhibitor for tertiary oil recovery, the mass parts of each component are as follows:

[0037] Alkyl imidazoline: 23 parts; Diethylene triamine: 15 parts; Rosin amine: 7 parts; Dodecyl dimethyl benzyl chloride: 0.5 parts; Dimethoprim: 0.5 parts; parts; vitamin C: 0.05 parts; water: 22.95 parts.

[0038] The preparation method of the above-mentioned high-temperature corrosion inhibitor for tertiary oil recovery is as follows: add the above-mentioned ratio of alkylimidazoline and diethylenetriamine into a four-necked flask, add 10% of the water that needs to be added, heat up to 78 ° C, and stir for 1 hour. Then add dodecyl dimethyl benzyl chloride, trimethoprim (TMP), dispersant, vitamin C, and rosin amine in proportion, stir for 30 minutes, add the remaining water and mix evenly to obtain high-temperature composite acidification corrosion inhibition agent.

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Abstract

The invention discloses a high-temperature corrosion inhibitor for tertiary oil recovery. According to the high-temperature corrosion inhibitor, the high-temperature corrosion inhibitor is compatiblewith foam flooding, a foaming agent, a foam stabilizer and a surfactant, or with poly / surface binary flooding, a polymer, the surfactant, the high-temperature corrosion inhibitor is applied to a tertiary oil recovery block with the formation temperature greater than 89 DEG C, the formation water salinity greater than 22000 mg / L, the hardness greater than 800 mg / L and the chlorine ion content greater than 18000 mg / L, the high-temperature corrosion inhibitor is compatible with foam flooding, the surfactant is any surfactant used for tertiary oil recovery, the high-temperature corrosion inhibitoris compatible with poly / surface binary flooding, and in the using process, the high-temperature corrosion inhibitor is mixed with an oil flooding main agent by using sewage to be diluted to 100-500 ppm. The high-temperature corrosion inhibitor has the advantages of being simple in preparation process, low in corrosivity, good in sterilization effect, high in corrosion inhibition capability and good in compatibility with oil recovery chemicals.

Description

technical field [0001] The invention relates to the technical field of petroleum oil recovery, in particular to a high-temperature corrosion inhibitor used for tertiary oil recovery, which adopts sewage preparation and sewage injection technology, and after being compatible with foam flooding and poly / surface binary flooding, the foaming rate and half-life period can be improved. Maintain the original viscosity and surface tension. Background technique [0002] The oil extraction process is generally divided into three stages. The primary oil recovery stage mainly relies on the energy of the formation itself to drive the flow of oil underground; as the energy of the bottom layer decreases, it is necessary to inject water (or gas, etc.) into the oil layer on the ground to drive the oil out. Secondary oil recovery. At present, most oil fields in my country are in the late stage of secondary oil recovery. There are nearly 90 tons of water in every 100 tons of produced liquid, ...

Claims

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Application Information

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IPC IPC(8): C09K8/54C09K8/58C09K8/584C09K8/594
CPCC09K8/54C09K8/58C09K8/584C09K8/594C09K2208/32
Inventor 胡玉国杨怀军庞玉山郭长江李靖郝永俊张婧甄巧玲陈颖周传臣张凤跃杨文涛
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM