#EOR, #Polymer
Reservoir Drive Mechanism
Primary recovery results from the use of natural energy present in a reservoir as the main source of energy for the displacement of oil to producing wells. These natural energy sources are solution gas drive, gas-cap drive, natural waterdrive, fluid and rock expansion, and gravity drainage. The particular mechanism of lifting oil to the surface, once it is in the wellbore, is not a
factor in the classification scheme.
Secondary recovery results from the augmentation of natural energy through injection of water or gas to displace oil toward producing wells. Gas injection, in this case, is either into a gas cap for pressure maintenance and gas-cap expansion or into oil-column wells to displace oil immiscibly according to relative permeability and volumetric sweepout considerations. Gas
processes that are based on other mechanisms, such as oil swelling, oil viscosity reduction, or favorable phase behavior, are considered EOR processes. An immiscible gas displacement is not as efficient as a waterflood and is used infrequently as a secondary recovery process today. (Its use in earlier times was much more prevalent.) Today, waterflooding is almost synonymous with the secondary recovery classification.
EOR results principally from the injection of gases or liquid chemicals and/or the use of thermal energy.
Hydrocarbon gases, carbon dioxide (CO2), nitrogen, and flue gases are among the gases used in EOR processes. The use of a gas is
considered an EOR process if the recovery efficiency significantly depends on a mechanism other than immiscible frontal displacement characterized by high-interfacial-tension (IFT) permeabilities. A number of liquid chemicals are commonly used, including polymers, surfactants, and hydrocarbon solvents. Thermal processes typically consist of the use of steam or
hot water, or rely on the in-situ generation of thermal energy through oil combustion in the reservoir rock.
EOR processes involve the injection of a fluid or fluids of some type into a reservoir. The injected fluids and injection processes supplement the natural energy present in the reservoir to displace oil to a producing well.

LINK FOR OTHER VIDEOS:

Enhanced Oil Recovery | Surfactant Flooding
https://youtu.be/BuwKSXmiGRI
Enhanced Oil Recovery|Carbon Dioxide
https://youtu.be/nLwOceKgZis
Enhanced Oil Recovery| Polymer Flooding
https://youtu.be/axVB9kk5t7Y
Enhanced Oil Recovery
https://youtu.be/7qoHlIdWkEQ
GLOSSARY OF OIL AND GAS TERMS| HYRDAULIC FRACTURING
https://youtu.be/W6gbH6fi6mc
Glossary Of Oil and Gas Terms | Barrel
https://youtu.be/HFfxh8b6eew
Glossary Of Oil and Gas Terms | API Gravity
https://youtu.be/usGtU2q8_1c
Well Completions| Introduction
https://youtu.be/N8enNcbuKUw
Primary Well Control| Explained
https://youtu.be/XqwW5x_WZpA
Oil and Gas Well Completion| Reservoir Rock Properties
https://youtu.be/NUB8E6QwDvk
Oil and Gas Well Completion| Well Test and DST
https://youtu.be/8bkOtg08yuU
Oil and Gas Well Completion| Cementing and Perforation
https://youtu.be/5S8Iw_KapPM
Basic Well Control| Well Barriers
https://youtu.be/sW6BI4xFiz0
Secondary Well Control | Explained
https://youtu.be/hIrXfQo1kf8