Systems and processes for hydrocarbon blending

A process for blending a hydrocarbon-based composition comprising:

• combining a first heated water stream with a first pressurized, heated hydrocarbon-based composition comprising asphaltene in a mixing device to create a first combined feed stream;
• allowing the first heated water stream and the first pressurized, heated hydrocarbon-based composition to interact such that the first combined feed stream comprises micelles and reverse micelles, thereby preventing asphaltene aggregation;
• introducing the first combined feed stream into a first supercritical upgrading reactor operating at a temperature greater than a critical temperature of water and a pressure greater than a critical pressure of water;
• at least partially converting the first combined feed stream to a first upgraded product;
• combining a second heated water stream with a second pressurized, heated hydrocarbon-based composition comprising asphaltene in a mixing device to create a second combined feed stream;
• allowing the second heated water stream and the second pressurized, heated hydrocarbon-based composition to interact such that the second combined feed stream comprises micelles and reverse micelles, thereby preventing asphaltene aggregation;
• introducing the second combined feed stream into a second supercritical upgrading reactor operating at a temperature greater than a critical temperature of water and a pressure greater than a critical pressure of water;
• at least partially converting the second combined feed stream to a second upgraded product;
• passing the first upgraded product out of the first supercritical upgrading reactor to a supercritical blending vessel operating at a temperature greater than a critical temperature of water and a pressure greater than a critical pressure of water;
• passing the second upgraded product out of the second supercritical upgrading reactor to the supercritical blending vessel operating at a temperature greater than a critical temperature of water and a pressure greater than a critical pressure of water;
• and
• blending the first upgraded product and the second upgraded product to form an upgraded blended hydrocarbon-based composition.