Enhanced oil recovery (EOR) studies

Enhanced oil recovery (abbreviated EOR), also called tertiary recovery, is the extraction of crude oil from an oil field that cannot be extracted otherwise. Whereas primary and secondary recovery techniques rely on the pressure differential between the surface and the underground well, enhanced oil recovery functions by altering the physical or chemical properties of the oil itself to make it easier to extract. When EOR is used, 30% to 60% or more of a reservoir’s oil can be extracted compared to 20% to 40% using only primary and secondary recovery.

There are three main EOR techniques:

• • • Miscible gas injection (CO2, Lean Gas, Rich Gas injection, VAPEX…)
    • Thermal EOR (Cyclic steam stimulation, steam flooding, SAGD, THAI, TAGOGD…)
    • Chemical EOR (Polymer, Surfactant, Alkaline…)

ThEC provides our clients with the following EOR services:

• • • Screening the proper EOR method based on reservoir characteristics
    • Developing a reservoir simulation sector model based on RC & RES workflows and type of simulation
    • analyzing different development strategies and selecting the best one
    • uncertainty under optimization to account for Risk and rewards
    • upscaling the results into full field reservoir simulation studies