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Scale prevention blocking remover for ternary composite water dependent well

A technology of ternary compound and plugging agent, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of waste of manpower, material and financial resources, oil pipe corrosion, oil pipe blockage, etc. The effect of scale rate

Inactive Publication Date: 2014-06-04
范金彪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the production process of ASP flooding wells in oil fields, some scales of calcium, magnesium, barium and strontium are prone to block the tubing and packers. At present, the strong acidic chemicals used in oil fields are quantitatively injected every 2 months for cleaning and descaling. There is a certain amount of corrosion on the inner and outer walls of the oil pipe, and the price of chemicals for each oil well in the year is 300,000-350,000 yuan, which is a waste of manpower, material and financial resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1

[0014] Weigh 50g of polyether polymer chelating agent, 20g of organic amine scale dissolver, 5g of emulsifier, 5g of stabilizer, 15g of deionized water, and 5g of reinforcing agent and mix them to prepare an acid plugging solution.

[0015] Example 2

Embodiment 2

[0017] Example 3

Embodiment 3

[0019] The anti-scaling, anti-scaling and blocking-removing agent for ASP flooding wells has an effective rate of removing deposited scale ≥ 90%, and the effective period of the measures is ≥ 200d. The corrosion rate of this product is very low. Put the N80 steel sheet into the 1:1 plugging solution solution at 70°C for 4 hours, and there is almost no corrosion. The pipe string can be moved during construction to reduce operating costs. Compared with acidification descaling, the descaling operation cycle is extended by at least 2 times. It can not only reduce the workload and cost of operation and construction, but also relatively increase the normal production timeliness of oil wells.

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PUM

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Abstract

The invention relates to a scale prevention blocking remover for a ternary composite water dependent well. The scale prevention blocking remover comprises the following components in percentage by weight: 40-60% of polyether type macromolecular chelating agent, 10-30% of organic amine scale dissolving agent, 2-10% of emulsifier, 3-9% of stabilizer, 5% of strengthening agent and 15% of deionized water. The scale prevention blocking remover for the ternary composite water dependent well is capable of effectively removing calcium, magnesium, barium and strontium scale and prolonging the scale removal working cycle, has no corrosion on steel and iron and ensures the normal production of scaling oil (water) wells, so that the capacity of the oil (water) wells is recovered.

Description

technical field [0001] The invention relates to a scale-removing, anti-scaling and blocking-removing agent in the field of oil recovery, in particular to a scale-removing, anti-scaling and blocking-removing agent for ternary compound oil flooding wells. Background technique [0002] Scaling of oilfield water is an inevitable problem in oilfield production. Scaling brings many hazards to production. For example, scaling in formations will cause water injection pressure to increase and oil well fluid production to decrease. Scaling in pipelines will cause blockage and localized corrosion, seriously affecting production safety. This problem becomes more and more prominent with the increase of oilfield water production. At present, in the production process of ASP flooding wells in oilfields, some scales of calcium, magnesium, barium, and strontium are prone to block the tubing and packers. At present, strong acidic chemicals used in oilfields are injected quantitatively every ...

Claims

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Application Information

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IPC IPC(8): C09K8/528
CPCC09K8/528
Inventor 范金彪范坤
Owner 范金彪
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