Modular hybrid low emissions power for hydrocarbon extraction

A system for supplying electric power to a plurality of electric motors coupled to formation treatment pumps, the system comprising:

• a plurality of electric motors, each motor coupled to a well treatment pump configured to treat an earth formation by pumping a liquid into a borehole penetrating the earth formation;
• a mobile substation configured to connect to and receive power from a utility electric grid;
• a plurality of mobile electric power generating units configured to generate electric power;
• and
• a controller configured to (i) receive a total required flow rate of the liquid;
• (ii) calculate a total amount of electric power required to achieve the required total flow rate;
• (iii) receive an amount of power available from the utility electric grid;
• (iv) direct the substation to provide electric power to the plurality of electric motors;
• and (v), direct one or more electric power generating units in the plurality of mobile electric power generating units to provide electric power to the plurality of electric motors according to a priority order to meet the total amount of electric power, if the required amount of electric power exceeds the amount of power available from the utility electric grid.