CO2 EOR

Produced water from chemical floods can cause problems for separation and water treatment equipment due to the polymers and surfactants used. Challenges are greater offshore where space limitations can affect treatment options.

This paper proposes a novel concept of low-salinity-water-alternating-gas (LSWAG) injection with CO2 under CO2-miscible-displacement conditions.

A variety of low-cost technologies can result in an increase in production in mature oil and gas fields, although the increase is usually temporary and not always economical.