System and method for liquefying production gas from a gas source

A system for liquefying production gas from a gas source containing a fluid having C1-C12 entrained gases, comprising:

• a first phase separator for separating C1-C12 gases from the fluid from the gas source, the first phase separator having an inlet in fluid communication with the gas source, a gas outlet and at least one alternative outlet;
• a first cryogenic liquefaction vessel having an inlet and an outlet, the inlet being in fluid communication with the gas outlet of the first phase separator, the first cryogenic liquefaction vessel being configured and disposed within the system such that the C1-C12 gases can be cooled to a temperature between −50 degrees Celsius and −87 degree Celsius to liquefy C3-C12 petroleum gases;
• a second phase separator for separating the liquified C3-C12 petroleum gases from the C1-C2 gases, the second phase separator having an inlet, a liquid outlet and a gas outlet, the inlet being in fluid communication with the outlet of the first cryogenic liquefaction vessel;
• at least one storage vessel in fluid communication with the liquid outlet of the second phase separator for collection of the liquefied C3-C12 petroleum gases.