Chemical injection system for a resource extraction system

A method of injecting a chemical for a resource extraction system, the method comprising:

• determining an ion concentration of a produced fluid;
• comparing the ion concentration of the produced fluid to a baseline ion concentration of the produced fluid;
• and
• adjusting an injection rate of the chemical into the resource extraction system based on the comparison of the ion concentration to the baseline ion concentration, wherein comparing the ion concentration to the baseline ion concentration comprises:
• (i) determining that levels of iron and manganese, a level of chlorides, or both, has increased in the produced fluid, and wherein adjusting the injection rate of the chemical into the resource extraction system comprises increasing the injection rate of the chemical into the resource extraction system;
• or
• (ii) determining that levels of barium and sulfate, levels of calcium and sulfate, levels of calcium and bicarbonate, levels of sodium and chlorides, or a combination thereof, have decreased in the produced fluid, and wherein adjusting the injection rate of the chemical into the resource extraction system comprises increasing the injection rate of the chemical into the resource extraction system.

One or more tangible, non-transitory, machine-readable media comprising instructions configured to cause one or more processors to:

• receive a first pressure from a first pressure sensor located at a first location of a plurality of locations of a resource extraction system;
• receive a second pressure from a second pressure sensor located at a second location of the plurality of locations of the resource extraction system, wherein the first location is different from the second location;
• determine a flowrate of a produced fluid of the resource extraction system based on the first pressure and the second pressure;
• determine an ion concentration of the produced fluid;
• and
• adjust an injection rate of a chemical into the resource extraction system based on the flowrate of the produced fluid, the ion concentration of the produced fluid, or both, wherein the instructions are further configured to cause the one or more processors to:
• compare the ion concentration of the produced fluid to a previous ion concentration of the produced fluid;
• and
• adjust the injection rate of the chemical into the resource extraction system based on the ion concentration of the produced fluid as the comparison of the ion concentration to the previous ion concentration, wherein comparing the ion concentration to the previous ion concentration comprises:
• (i) determining that levels of iron and manganese, a level of chlorides, or both, has increased in the produced fluid, and wherein adjusting the injection rate of the chemical into the resource extraction system comprises increasing the injection rate of the chemical into the resource extraction system;
• or
• (ii) determining that levels of barium and sulfate, levels of calcium and sulfate, levels of calcium and bicarbonate, levels of sodium and chlorides, or a combination thereof, have decreased in the produced fluid, and wherein adjusting the injection rate of the chemical into the resource extraction system comprises increasing the injection rate of the chemical into the resource extraction system.