Mobile blending apparatus for providing fluids with properties that vary over time

A continuous, real-time blending process, comprising:

• providing a flow of at least two concentrated fluids from at least two bulk containers, wherein the concentrated fluids are stored in the bulk containers;
• combining the flows of two or more concentrated fluids from the bulk containers;
• continuously blending the combined flow of the two or more concentrated fluids with water to produce a desired fluid comprising the concentrated fluids and the water;
• continuously providing the desired fluid to a well in a subsurface of the earth for a selected time period;
• automatically varying the flow of the concentrated fluids and the water to provide the desired fluid with a concentration of at least one concentrated fluid in the desired fluid that varies over the selected time period with a selected variation profile, wherein the selected variation profile has an average value of the concentration of the at least one concentrated fluid in the desired fluid, and wherein the concentration of the at least one concentrated fluid in the desired fluid varies both above and below the average value for at least some time during the selected time period;
• and
• determining the selected variation profile based on a plurality of inputs provided by a user, wherein at least one input provided by the user comprises the average value of the concentration of the at least one concentrated fluid in the desired fluid, at least one input provided by the user comprises at least a first time period for the concentration to be below the average value of the concentration, and at least input provided by the user comprises at least a second time period for the concentration to be above the average value of the concentration.

A continuous, real-time blending process, comprising:

• providing a flow of at least two concentrated fluids from at least two bulk containers, wherein the concentrated fluids are stored in the bulk containers;
• combining the flows of two or more concentrated fluids from the bulk containers;
• continuously blending the combined flow of the two or more concentrated fluids with water to produce a desired fluid comprising the concentrated fluids and the water;
• receiving inputs from a user, at least one received input comprising an average value of a concentration of at least one concentrated fluid in the desired fluid, at least one received input comprising at least a first time period for the concentration to be below the average value of the concentration, and at least one received input comprising at least a second time period for the concentration to be above the average value of the concentration;
• determining a selected variation profile for the concentration of the at least one concentrated fluid in the desired fluid based on the inputs received from the user, wherein the selected variation profile comprises varying the concentration of the at least one concentrated fluid in the desired fluid both above and below the average value such that the concentration is below the average value of the concentration for at least the first time period and above the average value of the concentration for at least the second time period;
• continuously providing the desired fluid to a well in a subsurface of the earth for a selected time period;
• and
• automatically varying the flow of the concentrated fluids and the water to provide the desired fluid with the concentration of the at least one concentrated fluid in the desired fluid that varies over the selected time period with the selected variation profile.