Scale inhibition antiscaling agent for oil-water well salt prevention and scale-inhibition operation and preparation process thereof

A preparation process and technology for oil and water wells, applied in the field of scale inhibitors, can solve the problems of strong corrosion of pipelines, resistance to high salinity, resistance to high calcium ions, etc., to achieve low corrosion, extended maintenance-free period, and low toxicity Effect

Inactive Publication Date: 2010-07-07
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the products on the market are not resistant to high salinity and high calcium ions, and they are all strongly acidic, highly corrosive to pipelines and injection-production equipment, and have disadvantages such as low sulfate scale inhibition rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1 A kind of preparation technology of antiscaling and antiscaling agent, prepare ethylenediamine tetramethylene phosphonate 2.0Kg, polymaleic acid 4.5Kg, sodium hexametaphosphate 5.0Kg and triethanolamine 7.0Kg; At normal temperature, Dissolve 5.0Kg of sodium hexametaphosphate in 30Kg of water, stir continuously for 20 minutes, then slowly add 7.0Kg of triethanolamine, after the two are fully mixed, continue to slowly add 2.0Kg of ethylenediaminetetramethyl Forked phosphonate and 4.5Kg polymaleic acid.

Embodiment 2

[0008] Embodiment 2 A kind of preparation technology of antiscaling and antiscaling agent, prepares ethylenediamine tetramethylene phosphonate 2.5Kg, polymaleic acid 5.0Kg, sodium hexametaphosphate 4.5Kg and triethanolamine 6.5Kg; At normal temperature, Dissolve 4.5Kg sodium hexametaphosphate in 35Kg water first, stir continuously for 40 minutes, then slowly add 6.5Kg triethanolamine, after the two are fully mixed, continue to slowly add 2.5Kg ethylenediaminetetramethyl in succession while stirring continuously Forked phosphonate and 5.0 Kg polymaleic acid.

[0009] The present invention solves the problem of salt formation and scale production in oil and water wells with complex water systems with high salinity, ensures normal production of oil and water wells, improves oil field development effects, reduces production costs, and solves the problem of salt formation and scale formation in oil fields of the same type. The solution is very instructive. The number of maintenanc...

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PUM

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Abstract

The invention relates to oil-water well salt prevention and scale-inhibition operation in the oil-field development process and a scale-inhibition agent used in a cooling circulation system, in particular to a scale inhibition antiscaling agent for oil-water well salt prevention and scale-inhibition operation and a preparation process thereof; the scale inhibition antiscaling agent is characterized in that: the scale inhibition antiscaling agent at least comprises 1) 2.0-2.5kg of ethanediamine tetramethylene phosphonate; 2) 4.5-5.0kg of polymaleic acid; 3) 4.5-5.0kg of sodium hexametaphosphate; 4) 6.5-7.0kg of triethanolamine; the preparation process of the scale inhibition antiscaling agent for oil-water well salt prevention and scale-inhibition operation is characterized in that: at normal temperature, 4.5-5.0kg of the sodium hexametaphosphate is dissolved by 30-35kg of clear water and is continuously stirred for 20-40 minutes, and then 6.5-7.0kg of the triethanolamine is slowly added in the mixture, after complete mixing, and 2.0-2.5kg of the ethanediamine tetramethylene phosphonate and 4.5-5.0kg of the polymaleic acid are slowly added continuously while stirring is carried out, so as to prepare the scale inhibition antiscaling agent; the scale inhibition antiscaling agent has hypersalinity resistance and high calcium ion resistance, takes alkalescence-neutrality, and has no strong corrosivity to injection-production equipment.

Description

technical field [0001] The invention relates to a scale inhibitor suitable for salt and scale prevention operations of oil and water wells and cooling circulating water systems in the process of oil field development, in particular to a scale and scale inhibitor for oil and water wells for salt and scale prevention operations and its preparation craft. Background technique [0002] Thousands of scale and scale inhibitors have been put on the market, such as Nalco-8365 and Nalco-3350 in the United States; T-225 and NW-25 in Japan. The antifouling agent research in our country started relatively late, but the development speed is very fast. At present, most foreign products can also be produced in our country. However, most of the products on the market are not resistant to high salinity and high calcium ions, and they are all strongly acidic, highly corrosive to pipelines and injection-production equipment, and low in scale inhibition to sulfate. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528
Inventor 王香增江绍静高瑞民周晔王成俊李强洪玲黄春霞刘春燕李世强赵丽
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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