Abstract
The phenomenon of petroleum wax deposition is very common during oil well production. When the wax molecule condenses on the surface of the pipeline, it will hinder the exploitation of crude oil, reduce the recovery rate of crude oil, and may lead to the blockage of the pipeline when it is serious, so that the oil recovery work will stop. This phenomenon can be obviously changed by using wax cleaning agent. However, the low ignition point and toxicity of oil-based wax remover are not conducive to oil recovery. Therefore, a new water-based paraffin remover SGJ-1 was developed in this paper. The best formula is: wax dispersant 15%, wetting reversion agent 1%, sodium silicate 1%, alcohol cosolvent 8% and 75% water. Condensation point, wax dissolution rate and anti-wax performance of SGJ-1 water-based dewaxing and anti-waxing agent were tested by self-assembly testing device. The experimental results show that the condensation point of SGJ-1 is -34°C, the viscosity reduction effect is good under 35°C, and the wax dissolution rate is 0.0512 g/min, The highest wax prevention rate can reach 89.58% and the wax removal and wax prevention ability is excellent. Compared with other paraffin removers, SGJ-1 can also reduce the viscosity of crude oil, so it has a good development prospect.
Highlights
Wax cleaning agent has become one of the most important links in oil mining industry
The experimental results show that the condensation point of SGJ-1 is −34 ̊C, the viscosity reduction effect is good under 35 ̊C, and the wax dissolution rate is 0.0512 g/min, The highest wax prevention rate can reach 89.58% and the wax removal and wax prevention ability is excellent
Because crude oil contains a large number of paraffin components, when the oil temperature decreases below the wax analysis point in the production process, the paraffin will precipitate, resulting in wax formation
Summary
Main experimental drugs: 60# paraffin, methyl stearate polyoxyethylene ether, fatty acid methyl ester ethoxy sulfonate, surfactant, methanol, ethanol, n-butanol, sodium silicate. V (g/min): Wax dissolution rate; m (g): Paraffin quality; t (min): Time required to dissolve paraffin. After the wax removal samples were kept constant temperature, the paraffin wax was invaded into the wax removal samples and the time of complete dissolution of paraffin was recorded. The pump in the device is a magnetic pump, and two waxing tubes are placed in the waxing chamber as the test tube and reference tube of paraffin wax. The test steps are as follows: first, two 500 ml beakers are added, 200 g of diesel oil and 50 g, of paraffin wax are added to dissolve , 50 g of ethanol and 50 minutes of distilled water are added, and the agitator is used to stir evenly for 15 minutes.
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