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Barium/strontium precipitate blocking remover composition for oil field and preparation method thereof

The technology of a plug removing agent and composition is applied in the preparation of barium and strontium scale plug removing agent composition in oil field and the field of barium strontium scale plug removing agent composition in oil field, which can solve the problems of high corrosiveness, large addition amount, toxicity and the like , to achieve the effect of wide applicable temperature range, simple preparation method and less usage

Inactive Publication Date: 2017-05-31
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the barium-strontium scale removing agents in domestic oil fields are basically composed of oxalic acid, citric acid, aminotrimethylene phosphonic acid, disodium ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid and sodium hydroxide. Large, highly corrosive, toxic, and the waste liquid is not easy to degrade after cleaning. The reaction time is 12 to 48 hours, and the descaling rate is between 30% and 90%. Most of the cleaning and descaling are two-step acid-base alternating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1; Weigh raw materials according to the following components and weight: acetone semicarbazone 30Kg, hydroxyethylacetamide 11Kg, hydroxymalonic acid 25Kg, 4-amino-1,2,4-triazole 18Kg, L- Sodium aspartate 7Kg, diethyl phenylacetylmalonate 19Kg, dimethylethanolamine 24Kg, dimethylpropanolamine 8Kg, o-ethoxybenzoic acid 3Kg, ethyl salicylate 10Kg, p-hydroxyacetophenone 10Kg, ammonia water (40wt%) 30Kg, water 110Kg.

[0027] Preparation method: Add the liquid raw materials hydroxyethylacetamide, diethyl phenylacetylmalonate, dimethylethanolamine, dimethylpropanolamine, o-ethoxybenzoic acid, and ethyl salicylate into water first , stir evenly to obtain the first liquid; then add solid raw materials acetone semicarbazone, hydroxymalonic acid, 4-amino-1,2,4-triazole, L-sodium aspartate, p-hydroxyacetophenone into the first Liquid, stirred until the solid raw materials are fully dissolved to obtain the second liquid; then add ammonia water with a concentration of 40...

Embodiment 2

[0028] Embodiment 2; Weigh raw materials according to the following components and weight: acetone semicarbazone 36Kg, hydroxyethylacetamide 16Kg, hydroxymalonic acid 20Kg, 4-amino-1,2,4-triazole 13Kg, L- Sodium aspartate 9Kg, diethyl phenylacetylmalonate 21Kg, dimethylethanolamine 21Kg, dimethylpropanolamine 6Kg, o-ethoxybenzoic acid 7Kg, ethyl salicylate 7Kg, p-hydroxyacetophenone 9Kg, ammonia water (40wt%) 40Kg, water 115Kg.

[0029] Preparation method: adjust the pH of the second liquid to 10.8 with ammonia water, and the remainder is the same as in Example 1.

Embodiment 3

[0030] Embodiment 3: Weigh raw materials according to the following components and weight: acetone semicarbazone 32Kg, hydroxyethylacetamide 13Kg, hydroxymalonic acid 24Kg, 4-amino-1,2,4-triazole 17Kg, L- Sodium aspartate 6Kg, diethyl phenylacetylmalonate 18Kg, dimethylethanolamine 25Kg, dimethylpropanolamine 9Kg, o-ethoxybenzoic acid 5Kg, ethyl salicylate 8Kg, p-hydroxyacetophenone 11Kg, ammonia water (40wt%) 33Kg, water 100Kg. Preparation method: adjust the pH of the second liquid to 11 with ammonia water, and the remainder is the same as in Example 1.

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Abstract

The invention discloses a barium / strontium precipitate blocking remover composition for an oil field. The barium / strontium precipitate blocking remover composition is prepared from the following raw materials in parts by weight: 30-36 parts of acetone semicarbazon, 11-16 parts of hydroxyethyl acetamide, 20-25 parts of tartronic acid, 13-18 parts of 4-amine-1,2,4-triazole, 6-10 parts of L-aspartic acid sodium, 18-22 parts of diethyl(phenylacetyl)malonate, 20-25 parts of dimethylethanolamine, 5-9 parts of dimethyl propanol amine, 3-7 parts of o-ethoxybenzoic acid, 7-10 parts of ethyl salicylate, 8-11 parts of p-hydroxy phenyl ethyl ketone, 30-40 parts of ammonia water and 100-120 parts of water. The blocking remover is used for complexing cleaning and descaling, and is low in usage, free of corrosivity and nontoxic; barium sulfate, barium sulfate, barium carbonate, strontium carbonate, calcium sulfate, carbonate and silicate scales generated by a water injection system can be quickly dissolved; the waste liquid after cleaning does not need to flow back to the ground for treatment and secondary well clogging of cleaning material precipitates is not caused; the blocking remover composition can be used at a room temperature to 100 DEG C; the descaling blockage removal time is 4-8h; and the descaling rate is greater than 98%.

Description

technical field [0001] The invention relates to an auxiliary agent used in oil recovery in oil fields, in particular to an oil field barium strontium scale unblocking agent composition, and also relates to a preparation method of the oil field barium strontium scale unblocking agent composition. Background technique [0002] Barium and strontium scale damage in oilfields is one of the common problems faced by oilfield water injection development, and it is still an unsolved problem so far. In view of the practical problem of barium and strontium scale removal in oilfield water injection development and oil production, our company conducted on-site investigations on the scaling status of domestic oilfields, consulted a large number of relevant domestic and foreign documents and collected data from Daqing Oilfield, Changqing Oilfield, and Shengli Oilfield. and the technical data on scale prevention and control in the water injection development of Qinghai Oilfield and the bari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528E21B37/06
CPCC09K8/528E21B37/06
Inventor 赵丽萍刘音希刘志新
Owner GANSU HEIMA PETROCHEM ENG
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