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Calcium-silicon mixed scale removing agent for alkali-surfactant-polymer mechanical recovery well

A calcium-silicon and scale-removing technology, which is used in cleaning appliances, earth-moving drilling, wellbore/well components, etc., can solve the problems of insufficient scale-cleaning rate, equipment corrosion, secondary precipitation, etc., and prolong the scale-cleaning time. , reduce corrosion, reduce the effect of use

Inactive Publication Date: 2016-11-09
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a calcium-silicon mixed scale cleaning agent for mining wells of three-way flooding machines. Calcium carbonate and amorphous silica-based calcium-silicon mixed scales have problems of insufficient cleaning rate, serious equipment corrosion, and secondary precipitation

Method used

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  • Calcium-silicon mixed scale removing agent for alkali-surfactant-polymer mechanical recovery well
  • Calcium-silicon mixed scale removing agent for alkali-surfactant-polymer mechanical recovery well
  • Calcium-silicon mixed scale removing agent for alkali-surfactant-polymer mechanical recovery well

Examples

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Effect test

Embodiment 1

[0038] This three-way flooding well calcium-silicon mixed scale cleaning agent is composed of carboxyethyl thiosuccinic acid, ammonium hydrogen fluoride, benzyl quinoline chloride, sodium diisobutylnaphthalene sulfonate, and water, according to mass percentage Calculated, carboxyethyl thiosuccinic acid 9%, ammonium bifluoride 9%, benzyl quinoline chloride 0.9%, sodium diisobutylnaphthalene sulfonate 2‰, and the rest is water; Calcium-silicon mixed scale cleaning agent does not generate secondary precipitation during the cleaning process, and the corrosion rate is 0.43g / ( m 2 h).

[0039] In this embodiment, the calcium-silicon mixed scale cleaning agent in the mining well of the three-way flooding machine is used to remove the calcium-silicon mixed scale method mainly composed of crystalline calcium carbonate and amorphous silicon dioxide. Figure 6 :

[0040] (1) put 6m 3 The calcium-silicon mixed scale descaling agent for the production well of the three-way flooding mach...

Embodiment 2

[0045] This three-way flooding well calcium-silicon mixed scale cleaning agent is composed of carboxyethyl thiosuccinic acid, ammonium hydrogen fluoride, benzyl quinoline chloride, sodium diisobutylnaphthalene sulfonate, and water, according to mass percentage In total, 13% of carboxyethylthiosuccinic acid, 9% of ammonium bifluoride, 1.3% of benzyl quinoline chloride, 5‰ of sodium diisobutylnaphthalene sulfonate, and the rest is water; Calcium-silicon mixed scale cleaning agent does not generate secondary precipitation during the cleaning process, and the corrosion rate is 0.43g / ( m 2 h).

[0046] In this embodiment, the calcium-silicon mixed scale cleaning agent in the production well of the three-way flooding machine is used to remove the calcium-silicon mixed scale mainly composed of crystalline calcium carbonate and amorphous silicon dioxide. The method is the same as in Example 1.

Embodiment 3

[0048] This three-way flooding well calcium-silicon mixed scale cleaning agent is composed of carboxyethyl thiosuccinic acid, ammonium hydrogen fluoride, benzyl quinoline chloride, sodium diisobutylnaphthalene sulfonate, and water, according to mass percentage In total, 11% of carboxyethylthiosuccinic acid, 7% of ammonium bifluoride, 1.1% of benzyl quinoline chloride, 5‰ of sodium diisobutylnaphthalenesulfonate, and the rest is water; Calcium-silicon mixed scale cleaning agent does not generate secondary precipitation during the cleaning process, and the corrosion rate is 0.43g / ( m 2 h).

[0049] In this embodiment, the calcium-silicon mixed scale cleaning agent in the production well of the three-way flooding machine is used to remove the calcium-silicon mixed scale mainly composed of crystalline calcium carbonate and amorphous silicon dioxide. The method is the same as in Example 1.

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Abstract

The invention relates to a calcium-silicon mixed scale removing agent for an alkali-surfactant-polymer mechanical recovery well. The calcium-silicon mixed scale removing agent for the alkali-surfactant-polymer mechanical recovery well is prepared from the following components in percentage by mass: 9 to 13 percent of carboxyethyl thiosuccinic acid, 6 to 9 percent of ammonium hydrogen fluoride, 0.9 to 1.3 percent of benzyl quinolinium chloride, 0.2 to 0.5 percent of diisobutyl sodium naphthalene sulfonate and the balance of water. According to the calcium-silicon mixed scale removing agent for the alkali-surfactant-polymer mechanical recovery well, no secondary precipitates are generated in a scale removing process, and the corrosion rate is 0.43g / (m<2>.h). The calcium-silicon mixed scale removing agent is suitable for removing calcium-silicon mixed scales mainly containing crystalline calcium carbonate and amorphous silicon dioxide common for the alkali-surfactant-polymer mechanical recovery well, and is complete in scale removal and low in corrosion rate, the scale removing rate can reach over 80 percent, and no secondary precipitates are generated in the scale removing process.

Description

technical field [0001] The invention relates to a scale-removing agent for solving the problem of scale-removing and jam-relieving in oil fields, in particular to a calcium-silicon mixed scale-removing agent for three-way flooding production wells. Background technique [0002] At present, in oil field production, ASP flooding results in fouling of oil wells, which increases the cost and time of on-site cleaning and plugging, maintenance and inspection of pumps, and seriously affects the normal oil recovery and economic benefits of the oil field. The existing hydrochloric acid descaling agent has only about 50% descaling rate on the calcium-silicon mixed scale mainly composed of crystalline calcium carbonate and amorphous silicon dioxide, which cannot completely remove the scale, and also has the following hazards: [0003] (1) Due to the H in the solution + High concentration, H + Under the action of the external electric field, the moving speed is fast, which leads to th...

Claims

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Application Information

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IPC IPC(8): C09K8/528E21B37/06
CPCC09K8/528C09K2208/32E21B37/06
Inventor 刘江红徐瑞丹王琪王庆国刘云铎芦艳任静薇王鑫张艳
Owner NORTHEAST GASOLINEEUM UNIV
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