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

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 ...

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.