There is a layer of sludge-like substance in electrodialysis
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There is a sludge-like substance between the oil and water in our electrodialysis tanks; test results show 40% water, 40% oil, and 20% mechanical impurities. Frequent shooting leads to abundance; it keeps gathering. Does anyone know about this? Is there a way to deal with it?
There is always an emulsification layer. In the later stages of development in old oil fields, the proportion of crude oil produced through tertiary composite flooding increases, and more and more chemical agents are added during the oil extraction process, such as polyacrylamide, all of which contribute to increased crude oil emulsification
The key point is that it’s black, similar to mud, and very sticky; if you throw a stone in, traces of it will still be there after ten minutes.
The molecular weight of polyacrylamide ranges from 5 million to 18 million, and it has a very high viscosity
Carry out regular electrodialysis maintenance tasks and perform backwashing on schedule
Is the molecular weight still this high? I’ve walked around underground once
It should be polyacrylamide; during maintenance, one can check the bottom of the tank – there should be a lot of it there.
Polymers added during oil production? What do you do?
Suggestions: 1. Adjust the operating temperature of electrodialysis to between 140-150 degrees； 2. Increase the dosage of the demulsifier appropriately; it is recommended to use an oily demulsifier ； 3. Adjust water injection and water cut to reduce the level of the electrodialysis zone ； 4. Adjust the mixing intensity before electrodialysis water enters the tank.