System and method for enhanced oil recovery utilizing alternating stacked liquid and gas slugs

A system for conducting enhanced oil recovery, the system comprising:

• a buffer tank configured to hold a liquid and a gas;
• and
• a fluid dispensing system in fluid communication with the buffer tank and comprising:
• a discharge line directed toward a wellbore;
• a gas valve;
• and
• a liquid valve;
• wherein the gas valve and the liquid valve are configured to selectively meter the liquid and the gas to the wellbore via the discharge line to produce liquid segments including entrained gas bubbles alternating with gas segments for delivery downhole into the wellbore.

A method for modeling co-injection of liquid and gas segments into a wellbore, the method comprising:

• determining inputs defining wellbore operating parameters and selecting a liquid and/or a gas for co-injection into the wellbore;
• determining a predicted bottomhole wellbore pressure based on the wellbore operating parameters by applying an alternating-segment hydrostatic pressure model;
• comparing the predicted bottomhole pressure to a predetermined target pressure;
• modifying one or more operating parameters based on the comparison;
• repeating the determining a predicted wellbore bottomhole pressure and comparing steps using the modified operating parameters until the predicted bottomhole pressure corresponds with the target pressure;
• and
• operating an enhanced oil recovery system in accordance with the modified operating parameters.